Abstract: Polyester polymer particle spheroids comprising a polyester polymer including: a carboxylic acid component containing at least 90 mole % of the residues of terephthalic acid, derivates of terephthalic acid, naphthalene-2,6-dicarboxylic acid, and/or derivatives of naphthalene-2,6-dicarboxylic acid,; and a hydroxyl component containing from 90 to 96 mole % of the residues of ethylene glycol, based on 100 mole percent of the carboxylic acid component residues and 100 mole percent hydroxyl component residues in the polyester polymer, wherein said particle has an kV. of at least 0.72 dL/g, and the It.V. at the surface of the particle is from 0.02 dL/g to less than 0.25 dL/g higher than the It.V. at the center of the particle, and wherein the polyester polymer spheroids are not solid state polymerized.

Abstract: A dual curable composition is provided, comprising a compound represented by formula (I): (acrylate)a-(A)-(silane)b ??(I) in which a and b are identical or different and are each represented by an integer greater than or equal to 1; and wherein the dual curable composition is radiation curable and/or moisture curable. The moiety A comprises at least one of an aliphatic hydrocarbon, a cycloaliphatic hydrocarbon, an aryl moiety, an ether, an ester, an amide, a urethane, a urea, a hydroxyl group-containing organic moiety, an acrylic oligomer, an epoxy oligomer, a urethane oligomer, a polyester oligomer, or mixtures thereof, and the dual curable composition has a molecular weight greater than or equal to 300.

Abstract: A method for synthesizing polylactide (PLA). The method employs RCOOCG, a nontoxic carboxylate of cyclic guanidine (CG), as a catalyst and non-toxic organic alcohol R?OH as an initiator to catalyze/initiate a living ring-opening polymerization of lactide (LA). The method includes: 1) adding monomer LA, the catalyst RCOOCG, and the initiator R?OH to a reaction still, where an initial molar ratio of the monomer to the catalyst is [LA]0/[RCOOCG]0=1000-1500:1, an initial molar amount [R?OH]0 of the initiator R?OH is determined by a number average molecular weight (Mn) of a target product PLA; 2) removing air in the reaction still, sealing the reaction still after a pressure in the reaction still is constant at between 1.0 and 0.1 torr; stirring and heating the reaction still in 30 to 40 minutes to a temperature between 95 and 96° C.; and allowing reactants in the reaction still to polymerization.

Abstract: Provided is a polycarbonate resin, including, as a raw material, a bisphenol A having 100 ppm by mass or less of isopropenylphenol and 250 ppm by mass or less of 2-(2-hydroxyphenyl)-2-(4-hydroxyphenyl)propane, each detected after heating in air at 175° C. for 1 hour.

Abstract: This invention provides a chlorinated poly(propylene carbonate) and the preparation method thereof, the chlorinated poly(propylene carbonate) is as represented by formula (I). Compared to the prior poly(propylene carbonate)s, the chlorinated poly(propylene carbonate) has relatively stronger electronegativity due to the presence of chlorine atoms and the interaction of the chlorinated poly(propylene carbonate) with other polar materials can be enhanced, so that it can be widely used as a compatilizer, a binder, a paint, an ink, and the like. After the introduction of chlorine atoms, hydrogen bond interaction is generated within the chlorinated poly(propylene carbonate), so that its processability and mechanical properties are both improved. Furthermore, the chlorine atom may improve the flame retardancy of chlorinated poly(propylene carbonate) materials.

Abstract: A fluorinated compound having at least one (meth)acrylate functional group disclosed. A curable composition comprising the fluorinated compound and polyfunctional acrylate, a cured product formed from the curable composition, and method of forming the cured product are also disclosed.

Abstract: Provided herein are methods of preparing a poloxamer for use in a cell culture medium. Also provided herein are cell culture media containing the poloxamer prepared by the methods herein, as well as methods of using the media for cell culturing and polypeptide production from cells.

Abstract: A polymer of fluorine-containing sulfonated poly(arylene ether)s and a manufacturing method thereof are provided. The polymer is formed by processing a nucleophilic polycondensation between a fluorine-containing monomer having an electron-withdrawing group and a multi-phenyl monomer. A main structure of the polymer of fluorine-containing sulfonated poly(arylene ether)s has a first portion with fluoro or trifluoromethyl substituted phenyl groups, and a second portion with sulfonated phenyl groups.

Abstract: A polyimide resin derived from at least two dianhydrides and at least two diamines is provided. The dianhyride is selected from a group consisting of p-phenylenebis(trimellitate anhydride), 4,4?-(hexafluoroisopropylidene)-diphthalic anhydride, and 4,4?-(4,4?-isopropylidenediphenoxy)bis(phthalic anhydride). One of the diamine monomers is 2,2?-bis(trifluoromethyl)benzidine, and the other diamine monomers are selected from a group consisting of 2,2-bis[4-(4-aminophenoxy)phenyl, 1,3-bis(4-aminophenoxy)benzene, p-phenylenediamine, 4,4?-oxydianiline, 4,4?-methylenedianiline, 4,4?-diaminobenzanilide, 4,4?-diaminodiphenyl-sulfone, m-tolidine, 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane and the combination thereof. The molar ratio of the dianhydrides to the diamines is between 0.85 and 1.15.

Abstract: Methods of forming a polyarylene sulfide and systems as may be utilized in carrying out the methods are described. Included in the formation method is a filtration process for treatment of a mixture, the mixture including a polyarylene sulfide, a salt byproduct of the polyarylene sulfide formation reaction, and a solvent. The filtration process includes maintaining the downstream side of the filter medium at an increased pressure. The downstream pressure can such that the boiling temperature of the mixture at the downstream pressure can be higher than the temperature at which the polyarylene sulfide is insoluble in the solvent.

Abstract: A method of producing a thiol group-containing polymer includes reacting bis(2-chloroethyl) formal with sodium hydrosulfide, wherein the thiol group-containing polymer is represented by general formula: HS—(R—Sr)n—R—SH where R is an organic group including a —C2H4—O—CH2—O—C2H4— structure, n is an integer of from 1 to 200, r is an integer of from 1 to 5, and the average value of r is 1.1 or more and lower than 1.8, and wherein the thiol group-containing polymer is a liquid polymer.

Abstract: Organopolysiloxanes containing a large proportion of methylene-bonded polar groups have high relative permittivities, and are especially useful as thermally stable dielectrics. A methoxymethyl alkoxysilane starting material is easily synthesized, and can be incorporated into the polymers by conventional methods known in organosilicon chemistry.

Abstract: The present invention relates to polysiloxane-polycarbonate block cocondensates comprising particular siloxane domains and having improved rheological properties and good mechanical properties as well as to mouldings and extrudates made from these polysiloxane-polycarbonate block cocondensates.

Abstract: The present invention relates to a resin composition containing components (A), (B), and (C), component (A) being a silicone resin having a weight-average molecular weight of 3,000-500,000 and having constituent units represented by compositional formula (1), component (B) being an epoxy resin curing agent, and component (C) being a filler. The present invention is capable of providing a resin film and a resin composition whereby wafers can be molded (wafer molding) in batch fashion, the resin composition having good molding properties with respect to large-diameter thin-film wafers in particular while at the same time imparting low warpage after molding and good wafer-protective ability, the resin composition also facilitating the molding step and being suitable for use in wafer-level packaging.

Abstract: A process for the processing of an undried particulate polymer or polymer mixture by means of a single- or multiscrew extruder comprising a barrel comprising one or more screws, a feed section intended for the polymer and provided on the barrel and, provided on the barrel, a melting region in which the polymer or polymer mixture melts, where the undried polymer or polymer mixture introduced by way of the feed section into the barrel is devolatilized in at least one vacuum devolatilization region downstream of the feed section and upstream of the melting region in the barrel.

Abstract: Method for producing a gel having a desired strength, by performing a step of removing a part or all of a solvent. Method for producing a gel containing a water-soluble organic polymer (A), a silicate salt (B), and a dispersant (C) for the silicate salt, including a desolvation step of removing a part or all of one or more solvents selected from the group consisting of water and a water-soluble organic solvent in the gel, or gelling a gel-forming composition containing the water-soluble organic polymer (A), the silicate salt (B), the dispersant (C) for the silicate salt, and one or more solvents selected from the group consisting of water and a water-soluble organic solvent and removing a part or all of the solvent in the composition.

Abstract: Disclosed are surfactant compositions comprising: (a) at least one alkoxylated glycol ether; and (b) at least one compound in accordance with Formula VII; where x is from about 1 to about 100, and each R4 is independently H or an alkyl moiety having from about 1 to about 2 carbon atoms, provided that the total number of carbon atoms within each x unit is not greater than about 8.

Abstract: The present invention relates to a super absorbent polymer and a method for preparing the same. The present invention has features that it is possible to prepare a super absorbent resin that can have an improved centrifuge retention capacity (CRC) and a high absorbency under load (AUL) by controlling the shape and size of the chopper die holes during coarse pulverization of a hydrous gel phase polymer.

Abstract: The present embodiment can teach a method of feeding to a materials processor a mixture containing an agglomerated drag reducer. The mixture is then homogenized to produce a remediated drag reducer. The maximum particle size diameter of the agglomerated drag reducing polymer is at least 5% larger than the maximum particle diameter of the remediated drag reducer.

Abstract: The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticiser is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.

Abstract: Epoxidised natural rubber [ENR] based vulcanised-blends with two different types of electrical conductive filler (i.e. conductive grade-carbon black and intrinsically electrical conductive polymer) may be produced respectively by using either internal mechanical mixing method or open milling method or the combination of the two methods. All these ENR based vulcanised-blends show high consistent reversible electrical behaviour under the tensile straining process. They also exhibit useful mechanical properties with tensile strengths up to 28.0 MPa, elongations at break up to 800.0% and Dunlop rebound resiliencies up to 55.0%. The lower the rebound resilience, the better the damping property and shock absorption ability for the ENR based vulcanised-blends. As a result, these ENR based vulcanised-blends are ideal to be used for manufacturing flexible sensors that may correspond to the tensile straining process.

Abstract: A composition and a method are provided for graphene reinforced polyethylene terephthalate (PET). Graphene nanoplatelets comprising a suitable initial surface area are added to a solvent for producing PET. In some embodiments, the solvent comprises ethylene glycol. The solvent and graphene nanoplatelets are sonicated to disperse the nanoplatelets within the solvent. The solvent and graphene nanoplatelets are centrifuged to remove nanoplatelet agglomerates within the solvent. A supernatant solution of dispersed graphene nanoplatelets and solvent is decanted and then used for in-situ polymerization of the graphene reinforced PET comprising a continuous matrix of PET with a dispersed graphene reinforcement phase. The graphene reinforcements comprise a minimal number of layers of two-dimensional mono-atomic carbon sheets. In some embodiments, the number of layers ranges between 1 layer and 7 layers.

Abstract: A method for producing a molded article of the present invention includes a step of preparing a pellet raw material containing a resin and raw fibers, a step of cutting the pellet raw material to obtain a plurality of pellets each containing the resin and fibers produced by cutting the raw fibers, a step of opening the fibers contained in each pellet; and a step of molding the pellets after being opened to obtain the molded article. According to the present invention, it is possible to easily produce a molded article (e.g., a back plate of a brake pad) having excellent mechanical strength. Further, According to the present invention, it is also possible to provide a molded article and a back plate each having excellent mechanical strength, and a brake pad having high reliability.

Abstract: The present disclosure provides polymers comprising at least one repeat unit represented by any one of structural formulas (IA)-(IE) disclosed herein, for example: Values for the variables are as disclosed herein. The polymers provided can be employed as ion conductors, for example in fuel cells, and have improved thermal characteristics.

Abstract: The present invention relates to an impregnation process for a fibrous substrate, a liquid composition for implementing this process and the obtained impregnated fibrous substrate. The impregnated fibrous substrate is suitable for manufacturing mechanical or structured parts or articles. In particular the present invention deals with an industrial process for impregnating a fibrous substrate or long fibers with a viscous liquid composition containing mainly methacrylic, vinylic or acrylic components either in form of monomers or polymers. This viscous composition is called hereafter liquid monomer syrup. The invention concerns also a fibrous substrate pre-impregnated with said syrup which is useful for manufacturing mechanical or structured parts or articles. More particular the impregnation of fibrous substrate with the monomer syrup is achieved in a mould.

Abstract: The invention provides a gas barrier film with low deterioration in the gas barrier property before and after high-temperature hot water treatment. The gas barrier film has a gas barrier coating film, formed as a composite film comprising a network structure having a mesh structure with Si—O—Si bonds as the basic lattice and a water-soluble polymer crystallized as microcrystals, incorporated into the mesh of the network structure, wherein a barrier coating agent, obtained by mixing a condensate solution of an alkoxysilane hydrolysate prepared as a mixed solution in which the proportion of bonded states of the silicon atoms of the condensate with Q1 and Q2 structures is at least 60% of the total silicon atoms, with a crystalline water-soluble polymer, is coated on a base material film, either after forming or without forming an aluminum oxide vapor deposition film, to form a coating layer.

Abstract: The present invention provides a sterilized oxygen-absorbing resin composition obtained by performing at least: a sterilizing step of irradiating with radiation an oxygen-absorbing resin composition containing a transition metal catalyst and a thermoplastic resin (a) having a tetralin ring as a constituent unit; and a step of heating the oxygen-absorbing resin composition at a temperature equal to or higher than the glass transition temperature of the thermoplastic resin (a) and equal to or lower than 200° C., after the sterilizing step.

Abstract: A structured porous metamaterial includes a three-dimensional matrix of at least one repeating base unit. The matrix is formed from an array of at least eight base units, each base unit including a platonic solid including at least one shaped void, wherein each base unit has void geometry tailored to provide a porosity of between 0.3 and 0.97, and to provide the metamaterial with a response that includes a Poisson's ratio of 0 to ?0.5 when under tension and compression, or negative linear compression (NLC), negative area compression (NAC), zero linear compression (ZLC), or zero area compression (ZAC) behaviour when under pressure.

Abstract: There is disclosed a phenol resin foam which contains a phenol resin, and a foaming agent comprising at least either one of a chlorinated hydrofluoroolefin or a non-chlorinated hydrofluoroolefin. With respect to the phenol resin foam, a density is 10 kg/m3 or more and 150 kg/m3 or less, a thermal conductivity under a 10° C. environment is 0.0175 W/m·k or less, and a thermal conductivity under a 23° C. environment is 0.0185 W/m·k or less.

Abstract: The present invention relates to polyolefin resin expanded beads containing multi-layer expanded beads containing a core layer in a foamed state containing a polyolefin resin and a cover layer coated on the core layer, the cover layer containing a mixed resin of a polyolefin resin (A) and at least one resin (B) selected from a polystyrene resin and a polyester resin, and the mixed resin having a weight ratio (A/B) of the polyolefin resin (A) and the resin (B) of from 15/85 to 90/10, and a composite laminated body using an expanded beads molded body thereof, and the expanded beads molded body is excellent in solvent resistance and also excellent in adhesiveness to a thermosetting resin on the surface of the molded body, and can provide a composite laminated body excellent in productivity with a thermosetting resin.

Abstract: A masterbatch containing an organic base component and heat-expandable microspheres including a thermoplastic resin shell and a thermally vaporizable blowing agent encapsulated therein. The organic base component has a melting point not higher than the expansion-initiation temperature of the heat-expandable microspheres and a melt flow rate (MFR, g/10 mm) higher than 50 and not higher than 2200. A ratio of the heat-expandable microspheres ranges from 30 to 80 wt % of the total weight of the heat-expandable microspheres and the organic base component. Also disclosed is a molding composition, a foamed molded article manufactured by molding the molding composition and a weathers tripping.

Abstract: A method for producing a heat-shrinkable product is provided. First, a polymer composition containing a polymer, a crosslinking agent and a micro-encapsulated foaming agent uniformly dispensed therein is melt mixed. The foaming agent has a peak activation temperature which is higher than a temperature of the melt mixing. Next, the polymer composition is injection molded into a molded product. This carried out at the peak activation temperature to activate the foaming agent. Then, the molded product is crosslinked within the mold.

Abstract: The present invention relates to a mesoporous polymeric separation material comprising one or more functional groups bound to metal ions from Cu, Zn, Ag, or Pd. Methods of producing the material, as well as methods for its preparation, and use of said material in separation of pesticides from food or feed products is disclosed.

Abstract: A method for the controlled removal of water from devulcanized rubber, comprising steps of contacting the devulcanized rubber with a solvent, dissolving the water out of the devulcanized rubber and into solution without removing other components in the rubber such as polymer, separating the devulcanized rubber from the solvent, and drying the devulcanized rubber. By controlling the amount of water that is in the solvent-solution, and/or the amount of time the devulcanized rubber is in contact with the solvent solution the amount of water that is removed can be controlled. By controlling the amount of water that is removed the rheology/viscosity (e.g. G? and G?) of the devulcanized rubber can be controlled.

Abstract: This invention relates to a method for producing functionalised telechelic oligomers, comprising two steps. The first step relates to bringing a raw material comprising at least one high-molecular-weight polymer comprising at least two unsaturations, into contact with a solution comprising at least one metathesis catalyst and at least one functionalising agent. The second step relates to the separation of the functionalised telechelic oligomers produced by the metathesis reaction in ionic liquid medium of the first step.

Abstract: A method for producing devulcanized rubber and an apparatus (100) therefor. The method for producing devulcanized rubber comprises the steps of (1) providing vulcanized rubber particles with a pre-determined particle size and (2) devulcanizing the vulcanized rubber particles. The vulcanized rubber particles are devulcanized mechanically by impact forces and devulcanized chemically by a chemical composition. The impact forces break sulphur-sulphur and sulphur-carbon bonds of the vulcanized rubber particles causing surfaces of the rubber to become receptive in reacting with the chemical composition and the chemical composition renders the sulphur passive to prevent reattachment of the bonds, of which the chemical composition comprises at least one accelerator, at least one inorganic activator and at least one organic activator.

Abstract: Provided is a resin composite material having a small number of voids and excellent tenacity. The resin composite material may be one obtained by mixing a carbon material having a graphene structure and having a content of less than 1 weight % of a volatile component volatilizable at 200° C. and a thermoplastic resin. The resin composite material may be a resin composite material including a carbon material having a graphene structure and a thermoplastic resin, the resin composite material containing 5 parts by weight or more of the carbon material per 100 parts by weight of the thermoplastic resin and having a breaking strain of 50% or more as measured according to JIS K 7161.

Abstract: A composition and a method are provided for graphene reinforced polyethylene terephthalate (PET). Graphene nanoplatelets (GNPs) comprising multi-layer graphene are used to reinforce PET, thereby improving the properties of PET for various new applications. Master-batches comprising polyethylene terephthalate with dispersed graphene nanoplatelets are obtained by way of compounding. The master-batches are used to form PET-GNP nanocomposites at weight fractions ranging between 0.5% and 15%. In some embodiments, PET and GNPs are melt compounded by way of twin-screw extrusion. In some embodiments, ultrasound is coupled with a twin-screw extruder so as to assist with melt compounding. In some embodiments, the PET-GNP nanocomposites are prepared by way of high-speed injection molding. The PET-GNP nanocomposites are compared by way of their mechanical, thermal, and rheological properties so as to contrast different compounding processes.

Abstract: The organic-inorganic composite of the present invention includes an organic compound having a carbonyl group, an inorganic compound containing a metal component, and a silver component. The ratio of the number of metal atoms in the inorganic compound to the number of carbon atoms in the organic compound is from 0.04 to 1.60, and the ratio of the number of silver atoms in the silver component to the number of carbon atoms in the organic compound is from 0.07 to 0.55. The organic-inorganic composite may include, for example, an inorganic compound having a metal matrix structure containing a metal M and oxygen, an organic compound having a carbonyl group, and silver ions. The carbonyl group is bonded to a side chain R1 of the organic compound and has an end group R2.

Abstract: A method involving polymerizing ethylene in the presence of a catalyst composition containing BaFe12O19 nanoparticles, a zirconocene catalyst, and an alkylaluminoxane co-catalyst. A nanocomposite is formed by the polymerization, whereby the BaFe12O19 nanoparticles are dispersed in a matrix of polyethylene (PE), and the % crystallinity is lowered. The activity of the catalyst is increased in the presence of the BaFe12O19 nanoparticles.

Abstract: Methods of preparing high-density polyethylene (HDPE) nanocomposites by in situ polymerization with a zirconocene catalyst, a methylaluminoxane cocatalyst, a calcium zirconate nanofiller in a solvent. The calcium zirconate nanofiller, which is dispersed across the polyethylene matrix, is found to enhance catalyst activity, and other properties of the HDPE nanocomposites produced, including but not limited to flame retardency, crystallinity and surface morphology.

Abstract: The present invention provides a polyamide resin composition comprising (A) a polyamide resin, (B) an aluminic acid metal salt, and (C) an organic acid, wherein the content of the aluminic acid metal salt (B) is larger than 0.6 parts by mass based on 100 parts by mass of the polyamide resin (A).

Abstract: A cross-linkable nitrile rubber composition has a carboxyl group-containing nitrile rubber (A) with an iodine value of 120 or less, polyamine cross-linking agent (B), and at least one compound (C) selected from an aliphatic alcohol (c1) having 1 to 9 carbon atoms, hydroxyl group-containing aromatic compound (c2), and nitrogen-containing heterocyclic compound (c3).

Abstract: Free radical scavengers, especially those that require the presence of oxygen, are useful in extending the life of photochromic, thermochromic, electrochromic, radiochromic, magnetochromic, photo-electrochromic and similar dyes. Particularly, preferred scavengers are the quinones be it O, M or p- and, most preferably, either the ortho, meta or para-hydroquinone. The so-enhanced dye can be used as a coating or cast as a film.

Abstract: This invention relates to an elastomeric nanocomposite composition, the composition comprising at least one elastomer, at least one nanofiller, and an ionomer stabilizer in the amount of at least about 0.5 phr of the composition, the elastomer comprising units derived from isoolefins having from 4 to 7 carbon atoms and at least one multiolefin, and the nanofiller consisting of a layered filler, wherein the stabilizer is added to improve the stability of the Mooney viscosity of the composition over time.

Abstract: The present invention relates to a process for producing a thermoplastic polyurethane, comprising the provision of a composition Z(W) comprising at least one carbodiimide selected from the group consisting of monomeric aliphatic carbodiimides, oligomeric aliphatic carbodiimides, polymeric aliphatic carbodiimides, monomeric aromatic carbodiimides, oligomeric aromatic carbodiimides and polymeric aromatic carbodiimides, and at least one ester selected from the group consisting of citric acid esters, acetyl citric acid esters, phthalic acid esters, benzoic acid esters, adipic acid esters, hydrogenated phthalic acid esters and phosphoric acid esters; and the subsequent addition of the composition Z(W) to a thermoplastic polyurethane or a reaction mixture for producing a thermoplastic polyurethane. Further, the present invention relates to a thermoplastic polyurethane obtainable or obtained by a process according to the invention and to the use of the composition Z(W) as plasticizer for thermoplastic polyurethanes.

Abstract: Provided is a vinyl chloride resin composition that can provide a molded product having superior flexibility at low temperatures. The vinyl chloride resin composition includes (a) a vinyl chloride resin and (b) a dodecanedioic acid diester. Moreover, (a) the vinyl chloride resin includes (x) a base vinyl chloride resin in an amount of from 70 mass % to 100 mass % and (y) vinyl chloride resin fine particles in an amount of from 0 mass % to 30 mass %.

Abstract: Anti-fog compositions comprising a primary film having opposing major planar surfaces and a central coplanar region disposed between the opposing major planar surfaces and comprising cellulose acetate and a plasticizer. The cellulose acetate may have a degree of substitution less than 2.6. The plasticizer may be selected from the group consisting of 1,2,3-triacetoxypropane (triacetin), tributyl citrate, triethyl citrate, triphenyl phosphate, tris(clorisopropyl)phosphate, dimethyl phthalate, diethyl phthalate, bornan-2-one, PEG-DGE, PPG-DGE, tributyl phosphate, and combinations thereof. The primary film has a thickness greater than 90 microns.

Abstract: Disclosed is a rubber composition, including a conjugated diene-based polymer and an amine compound.

Abstract: This invention relates to a brominated elastomer composition comprising a free radical scavenger. The scavenger is present in the amount of at least about 0.05 wt % of the composition. The scavenger is added to the composition so that the Mooney viscosity of the composition does not increase by more than about 15% to about 40%, for up to about 15 days at 80° C. The scavenger can be a sterically hindered nitroxyl ether, a nitroxyl radical, or both.