Abstract: The present disclosure relates to recyclable extrusion blow molded articles made from blends of recycled PET and copolyester compositions which comprise residues of terephthalic acid, neopentyl glycol (NPG), 1,4-cyclohexanedimethanol (CHDM), ethylene glycol (EG), and/or 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues, in certain compositional ranges that are <4 mm thickness, have a high level of recycled PET content, have low haze and are recyclable in a PET stream.

Abstract: A modified EVOH resin comprising aliphatic polyester units, wherein an average chain length of the aliphatic polyester units in the modified EVOH resin is 1.5 or more. A significant decrease in melting point is suppressed in the modified EVOH resin.

Abstract: A polymer including a plurality of melamine monomers and at least one oxalyl linker between each pair of the monomers is disclosed. Related synthesis methods, methods of use and articles of manufacture are also disclosed.

Abstract: The present disclosure relates to a polyimide precursor and flexible polyimide obtained by imidization of the polyimide precursor and having high transparency, high glass transition temperature and low coefficient of thermal expansion.

Abstract: A method for continuously preparing a formulated polyamide prepolymer, of which the solution viscosity is from 0.25 dL/g to 0.70 dL/g, as measured according to ISO 307:2007 in m-cresol at 20° C., the method including a step of polycondensation on the basis of one or more polyamide precursor monomers, said polycondensation step being carried out in an extruder comprising at least two co-rotating conveying screws, the at least one monomer being previously fed therein in solid or liquid form without being dissolved in a solvent or in water, and said polycondensation step being carried out without extraction of the water formed during said polycondensation step and comprising the addition of at least one additive during said polycondensation step in the extruder.

Abstract: The invention discloses a polybutylene terephthalate composition comprising as component (A) polybutylene terephthalate resin in an amount of from 40 wt % to 90 wt %, as component (B) glass fiber having low dielectric constant and dissipation factor measured according to GB 9534-88 in an amount of 10 wt % to 60 wt %. The invention also disclosed a radar device component containing the polybutylene terephthalate composition.

Abstract: A polyester resin including dicarboxylic acid constituent units and diol constituent units, wherein the diol constituent units include a constituent unit A1 derived from a diol having a cyclic acetal skeleton and a constituent unit A2 derived from 2,2,4,4-tetramethoxy-1,3-cyclobutanediol, and wherein the dicarboxylic acid constituent units include a constituent unit B1 derived from 2,6-naphthalenedicarboxylic acid and/or dimethyl 2,6-naphthalenedicarboxylate.

Abstract: An object of the present disclosure is to provide a method for producing an aliphatic polyester resin which substantially does not contain impurities, such as metals, and which has high molecular weight, particularly a polylactic acid having high molecular weight and high optical purity. The method for producing an aliphatic polyester resin of the present disclosure has a step of contacting a solution containing a cyclic ester with a cyclic amine catalyst and a polymerization initiator to initiate a reaction, a step of conducting the reaction by flow-type polymerization, and a step of subjecting the product obtained in the flow-type polymerization to further reaction by postpolymerization by stirring.

Abstract: A process for preparing preferably degradable copolymers by free radical ring-opening polymerization using thionolactone monomers or thionocarbonate monomers, in the presence of a radical polymerization initiator. Also, the copolymers, which include thioester or thiocarbonate bonds, that are obtained by carrying out the process including the free radical ring-opening polymerization using thionolactone monomers or thionocarbonate monomers.

Abstract: Applicants disclose a family of low-molecular-weight, main-chain thermotropic liquid-crystalline polyimides (TLC-PI) that are thermally crosslinkable and processes of making and using same. Such materials provide flexibility advantage when modifying ink materials to meet varying processing conditions in additive manufacturing of devices and components that require high-temperature polymers.

Abstract: Processes and systems for producing isomeric mixtures of aromatic amine monomers from aromatic feeds. An example process for producing isomeric mixtures of aromatic amine monomers from aromatic feeds may include nitrating at least a portion of an aromatic feed to produce a mixture of nitrated aromatic compounds. The example process may further include hydrogenating at least a portion of the nitrated aromatic compounds to produce an isomeric mixture of aromatic amine monomers. The example process may further include processing the isomeric mixture of aromatic amine monomers to form a product selected from an aromatic compound with a different functional group than the aromatic amine monomers, a polymerized product, or a reaction product of the aromatic amine monomers and H2S.

Abstract: A method for producing a polyoxymethylene polyoxyalkylene copolymer, comprising reacting a polymer formaldehyde compound with an alkylene oxide in the presence of a double metal cyanide (DMC) catalyst, wherein the polymer formaldehyde compound comprises at least one terminal hydroxyl group and wherein the method comprises the steps of placing a suspending agent in a reactor and subsequently incrementally or continuously metering in the polymer formaldehyde compound into the reactor during the reaction is provided.

Abstract: Disclosed are biodegradable polyester polymers comprising lignin-containing segments and vegetable-oil based segments. Also disclosed herein are methods of making biodegradable polyester polymers and the articles made from these polymers.

Abstract: Disclosed herein are ethylene-based polymers generally characterized by a melt index of less than 1 g/10 min, a density from 0.93 to 0.965 g/cm3, a CY-a parameter at 190° C. of less than 0.2, an average number of short chain branches per 1000 total carbon atoms of the polymer in a molecular weight range of 400,000 to 600,000 g/mol that is greater than that in a molecular weight range of 40,000 to 60,000 g/mol, and an average number of long chain branches per 1000 total carbon atoms of the polymer in a molecular weight range of 400,000 to 600,000 g/mol that is greater than that in a molecular weight range of 4,000,000 to 6,000,000 g/mol.

Abstract: A polymer having a backbone chain, wherein the backbone chain includes linear amide linkages and nitrogen-atom-containing heteromonocyclic moieties, wherein the backbone chain is free of peptide linkages or wherein the backbone chain has a proportion of peptide linkages of maximum 30%, based on a total number of the linear amide linkages of the backbone chain, and wherein the nitrogen-atom-containing heteromonocyclic moieties have a proportion of 5% by weight to 25% by weight, based on the total weight of the polymer, is provided. A product or article and the use of the polymer for manufacturing or producing the product or article are further provided.

Abstract: The present disclosure pertains to a 3D scaffold for cell growth and proliferation. In particular, the present disclosure provides a method of producing an artificial 3D scaffold to support stem cell growth and later their differentiation, by converting biodegradable amphiphilic copolymers (star polymer) into nanowire scaffolds, through a molecular self-assembly process. The invention also relates to the use of said scaffold for cell culture and/or transplantation.

Abstract: The present invention provides an optical film comprising a polymer resin, which comprises a first repeating unit, a second repeating unit, a third repeating unit and a fourth repeating unit, wherein the optical index of the film is 1.

Abstract: Provided is a poly(lactic acid-b-3-hydroxypropionic acid) block copolymer in which transparency is improved by introducing a 3-hydroxypropionic acid-derived monomer into a polylactic acid, and thus its application field can be expanded.

Abstract: [Problem] Provided is a resin composition capable of producing a film having an excellent gas-barrier property and a small variation in thickness. [Solution] The resin composition comprises (A) an EVOH-based resin in an amount of at least 40% by weight but 99% by weight or less, (B) a PVA-based resin (B), and (C) an acid-modified polyolefin. The resin composition contains at most 1% of volatile content. The component (B) is preferably a PVA-based resin having a primary hydroxyl group in the side chain.

Abstract: A negative-type photosensitive resin composition that has a satisfactory imidization rate and can yield a resin layer with high chemical resistance, even under low-temperature curing conditions of 200° C. or below, the negative-type photosensitive resin composition containing a photopolymerization initiator (B) in a proportion of 0.1 part by mass to 20 parts by mass with respect to 100 parts by mass of a polyimide precursor (A), the polyimide precursor (A) being a polyamic acid ester or polyamic acid salt with a specific structure, and the weight-average molecular weight (Mw) of the polyimide precursor (A) being 3,000 or greater and less than 16,000, in terms of polystyrene, according to gel permeation chromatography (GPC).