Abstract: Provided are a microexpanded polypropylene material and a preparation method and use thereof. The micro-EPP material includes the following components: polypropylene, poly(1-butene)-grafted sodium maleate, an ethylene-octene random copolymer, a filler, a lubricant, and an antioxidant. The present disclosure adopts a combination of polypropylene and an ethylene-octene random copolymer that have proper melt flow indexes to ensure the smooth foaming of materials. On this basis, poly(1-butene)-grafted sodium maleate is added. The special low melting point and polar grafting modification of poly(1-butene)-grafted sodium maleate can significantly improve the interfacial bonding between a filler and polypropylene, which is conducive to foam molding.

Abstract: Provided are a liquid crystal polymer-based composition and a preparation method and use thereof. The composition includes in parts by weight: 100 parts of an LCP resin, 10-80 parts of a fibrous filler, and 15-80 parts of a sheet-like filler; a mass ratio of the fibrous filler to the sheet-like filler is (0.2-2):1; in the fibrous filler, a weight percentage of a fibrous filler with a retained length of less than or equal to 100 ?m is higher than or equal to 50%, and a weight percentage of a fibrous filler with a retained length of more than or equal to 250 ?m is 1% to 5%; the sheet-like filler consists of a small sheet-like filler with a particle size D50 of 2.5 ?m to 4.5 ?m and a large sheet-like filler with a particle size D50 of 48 ?m to 70 ?m in a mass ratio of (0.5-2):1.

Abstract: The present invention provides an aliphatic polyester, a polyester composition containing the same, and use thereof. The aliphatic polyester includes a dicarboxylic acid residue, a diol residue, and a branching agent residue; the dicarboxylic acid residue includes the following residues: a1) based on a total molar percentage content of a1) and a2) as 100 mol %, 71-89 mol % of a succinic acid residue; and a2) based on the total molar percentage content of a1) and a2) as 100 mol %, 11-29 mol % of a sebacic acid residue; the diol residue is selected from a 1,4-butanediol residue with a molar content at least equal to that of the dicarboxylic acid residue; and based on a total mass of the aliphatic polyester as 100 wt %, a mass percentage content of the branching agent residue is 0.09-0.22 wt %. The aliphatic polyester solves the problem of low heat sealing strength of aliphatic polyesters.

Abstract: The present invention provides an aliphatic polyester, a polyester composition containing the same, and use thereof. The aliphatic polyester includes a dicarboxylic acid residue and a diol residue; the dicarboxylic acid residue includes the following residues: a1) based on a total molar percentage content of a1) and a2) as 100 mol %, 61.2-69 mol % of a succinic acid residue; and a2) based on the total molar percentage content of a1) and a2) as 100 mol %, 31-38.8 mol % of a sebacic acid residue; and the diol residue is selected from a 1,4-butanediol residue with a molar content at least equal to that of the dicarboxylic acid residue.

Abstract: The present invention provides an aliphatic polyester and use thereof. The aliphatic polyester includes a dicarboxylic acid residue and a diol residue; the dicarboxylic acid residue includes the following residues: a1), based on a total molar percentage content of a1) and a2) as 100 mol %, 65-90 mol % of a succinic acid residue; and a2), based on the total molar percentage content of a1) and a2) as 100 mol %, 10-35 mol % of a sebacic acid residue; the diol residue is selected from a 1,4-butanediol residue with a molar content at least equal to that of the dicarboxylic acid residue; and the aliphatic polyester includes an oligomer with a number-average molecular weight<1,000 as measured by gel permeation chromatography (GPC), and a mass percentage content of the oligomer with the number-average molecular weight<1,000 as measured by GPC in the aliphatic polyester is 0.08-3.5 wt %.

Abstract: Provided are a polycarbonate alloy material with good color stability, and a preparation method thereof and use thereof. The polycarbonate alloy material with good color stability includes the following components in parts by weight: 50-90 parts of polycarbonate, 1-20 parts of an acrylonitrile-butadiene-styrene copolymer, 5-20 parts of a flame retardant, 1-25 parts of a toughening agent, 0.1-2 parts of a stabilizer, and 0.1-5 parts of an anti-dripping agent. The polycarbonate alloy material not only has good thin-wall flame retardance, but also has a higher tensile strength retention rate after long-term thermo-oxidative aging, a browning problem is obviously improved, and a use scenario is wide.

Abstract: A composite treatment process includes steps: conveying the waste plastic bottles and adjusting the same to be upright, stretching, feeding, slitting, screening waste materials and plastic strips, cleaning the plastic strips, preliminarily removing water from the plastic strips, and dewatering and drying the plastic strips. According to the present invention, slit products of bottle caps and bottle collars are separated by the physical properties of the slit products of the bottle caps, the bottle collars and bottle bodies to obtain bottle body plastic strips, so that a step of removing label stickiness by heating and boiling and a step of removing cap impurities by floating and filtering are omitted, thereby reducing energy consumption and wastewater.

Abstract: The present invention relates to a polycarbonate alloy material, a preparation method therefor and a use thereof. The polycarbonate alloy material includes the following components in parts by weight: 10-99.9 parts of a polycarbonate resin, 5-50 parts of a styrene resin, 0.05-2 parts of a modified metal hydroxide, 1-30 parts of a toughening agent, and 0.01-2 parts of a stabilizer; the modified metal hydroxide is a metal hydroxide subjected to surface treatment with dimethylsiloxane and/or methylphenylsiloxane; and the styrene resin is at least one of a styrene-acrylonitrile copolymer or a styrene-butadiene-styrene copolymer. The polycarbonate alloy material has a low combustion rate as well as excellent mechanical properties and appearance, and can be widely used in fields such as electronic and electrical appliances, transportation, household appliances, and aerospace.

Abstract: The present invention provides a bio-based succinic acid composition, a preparation method therefor, and use thereof. The bio-based succinic acid composition includes bio-based succinic acid and a readily oxidizable substance; and a content of the readily oxidizable substance in the bio-based succinic acid composition is ?0.32 mL/g. In the present invention, the bio-based succinic acid composition has a long shelf life, a small change in b value after aging, and good aging stability. Moreover, a polyester prepared from the bio-based succinic acid composition has a lower acid number, a whiter color, and a higher molecular weight.

Abstract: The present invention provides a bio-based succinic acid composition, a preparation method therefor, and a polyester prepared therefrom. The bio-based succinic acid composition includes bio-based succinic acid and a metal ion; and a mass content of the metal ion in the bio-based succinic acid composition is 10-350 ppm. In the present invention, by adopting the bio-based succinic acid composition containing the metal ion as a raw material for the polyester and controlling the content of the metal ion in the bio-based succinic acid composition within a specific range, the obtained polyester has better mechanical properties and heat retention stability.

Abstract: The present invention provides a succinic acid composition, a polyester prepared therefrom, and a polyester composite material. The succinic acid composition includes succinic acid, a compound containing a sulfate radical, and a phosphorus compound; a mass content of the sulfate radical in the succinic acid composition is 240-500 ppm; and a mass content of a phosphorus element in the succinic acid composition is 0.5-40 ppm.

Abstract: The present disclosure provides a PBT resin, comprising an end group containing an acylurea group, where a content of the end group containing the acylurea group in the PBT resin is in a range of 0.5-10 mol/t, and a content of a carboxyl end group in the PBT resin is less than or equal to 20 mol/t. The PBT resin of the present disclosure is capped with a capping agent containing an aromatic carbodiimide functional group, and contains the carboxyl end group with a content of less than or equal to 20 mol/t, thereby obtaining PBT with a certain proportion of ?-form crystal and excellent mechanical properties.

Abstract: A biodegradable polyester composition, a preparation method therefor and use thereof are provided. The biodegradable polyester composition of the present invention includes a biodegradable polyester and a titanium element. Polymerizable monomers of the biodegradable polyester include: an aromatic dicarboxylic acid or an esterified product thereof, or a mixture thereof; an aliphatic dicarboxylic acid or an esterified product thereof, or a mixture thereof; a dihydroxy compound; and a chain extender. A content of the titanium element in the biodegradable polyester composition is 55-86 ppm; and an acid number of the biodegradable polyester composition is 1.10-1.96 mg KOH/g.

Abstract: An aliphatic-aromatic polyester composition, a polyester fiber, a preparation method therefor and use thereof are provided. The aliphatic-aromatic polyester composition includes the following components: i) an aliphatic-aromatic polyester based on aliphatic and aromatic dicarboxylic acids and an aliphatic dihydroxy compound; and ii) a titanium element, wherein calculated based on a weight of the aliphatic-aromatic polyester composition, a content of the titanium element is 55-88 ppm, and an acid number of the aliphatic-aromatic polyester composition is ?0.84 mg KOH/g according to the standard DIN EN 12634-1998.

Abstract: A polyamide molding composition is provided, including the following components in parts by weight: a PAXC/YC resin in 40 parts to 75 parts, a white pigment in 30 parts to 60 parts, and a dispersing agent in parts by weight that are 1.5% to 5% of the parts by weight of the white pigment; based on a molar percentage of the PAXC/YC, the PAXC/YC resin includes 60 mol % to 100 mol % of an XC unit and 0 mol % to 40 mol % of a YC unit; the XC unit consists of a 1,4-cyclohexanedicarboxylic acid unit and a diamine unit; the YC unit consists of a 1,4-cyclohexanedicarboxylic acid unit and a diamine unit.

Abstract: The present invention belongs to the technical field of quantum-dot diffusion plates, and particularly relates to a quantum-dot diffusion plate, and a preparation method therefor and the application thereof. The quantum-dot diffusion plate comprises a diffusion layer, a quantum dot layer and a transparent layer, wherein the quantum dot layer is arranged between the diffusion layer and the transparent layer. The design of the diffusion layer and the transparent layer, which are respectively at the upper portion and lower portion, can ensure that quantum dots are protected by the upper and lower layers as well as ensuring a lighting effect of the diffusion plate, thereby preventing the quantum dots from inactivation caused by the impact of external factors during the use and storage of the quantum dots, and improving the brightness retention rate.

Abstract: The present invention discloses a polyester, a preparation method therefor and use thereof. The polyester includes repeating units derived from the following components: a first component A, based on the total molar weight of the first component A, including: a1) 81-100 mol % of succinic acid, or an ester derivative thereof or an anhydride derivative thereof, and a2) 0-19 mol % of a dicarboxylic acid other than succinic acid, or an ester derivative thereof or an anhydride derivative thereof; a second component B: 1,4-butanediol; and a third component C: a dimer(1,4-butanediol); based on the total molar weight of the first component A, the molar content of the repeating unit —CH2CH2CH2CH2—O— in the third component C is 0.05-3.0 mol %. In the present invention, the molar content of the repeating unit —CH2CH2CH2CH2—O— in dimer(1,4-butanediol) is controlled to 0.05-3.0 mol %, and thus, the resin color of the polyester can be effectively improved.

Abstract: The present disclosure relates to a polypropylene composition resistant to thermo-oxidative aging, a preparation method and a use thereof. The polypropylene composition resistant to thermo-oxidative aging comprises polypropylene, a toughener, a filler, carbon black and other additive or additives. The polypropylene composition resistant to thermo-oxidative aging provided in the present disclosure has a better thermo-oxidative aging resistance by adding specific carbon black, without any complicated surface modification for the carbon black, and the polypropylene composition can be widely used in auto parts or cables.

Abstract: Disclosed are a semi-aromatic polyester, and a preparation method therefor and a use thereof. In the present invention, on the basis of the total molar amount of diacid, the molar content of a repeating unit —CH2CH2CH2CH2—O— in dimer(1,4-butanediol) is controlled to be 0.05-0.35 mol %, which can effectively improve the resin color of the semi-aromatic polyester.

Abstract: The present invention discloses a semi-aromatic polyester, and a preparation method therefor and an application thereof. The semi-aromatic polyester has a specific scope of double bond content. Compared with the existing semi-aromatic polyester, the semi-aromatic polyester of the present invention has better melting heat retention stability and fine color.