Biodegradable branched aromatic polyester-aliphatic polyester multi-block polymer

A multi-block copolymer and aromatic polyester technology, which is applied in the field of biodegradable branched aromatic polyester-aliphatic polyester multi-block copolymer, can solve the problem of poor melt strength, poor stability, and easy tearing Crack and other issues

Active Publication Date: 2012-02-08
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor melt strength, low melt viscosity, poor stability, low transverse tensile strength and easy tearing of film product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The preparation of biodegradable branched polybutylene terephthalate-block-polybutylene succinate-block-polypropylene succinate multi-block copolymer comprises the following steps:

[0040] ①Synthesis of hydroxyl-terminated polybutylene terephthalate prepolymer

[0041] Take terephthalic acid and 1,4-butanediol with a molar ratio of 1:1.8 by weighing a total of 1,500 g into the reactor, and then add 1 g of antimony trioxide (as a catalyst), wherein the reactor is equipped with a high Pure nitrogen interface, mechanical stirrer, water separator, condenser tube, etc. Start stirring (rotating speed 200r / min), heat the reaction system to 180°C, and then raise the temperature to 220°C in a temperature-programmed manner; at this temperature, the above-mentioned monomers are subjected to esterification reaction until the water output reaches 95wt% of the theoretical water output , raise the temperature to 230°C, close the nitrogen passage valve and start vacuuming to below 10...

Embodiment 2

[0049] Preparation of biodegradable branched polyethylene terephthalate-block-polyethylene adipate-block-poly(ethylene glycol succinate-co-pentanediol succinate) ester A multi-block copolymer comprising the steps of:

[0050] ①Synthesis of hydroxyl-terminated polyethylene terephthalate prepolymer

[0051] Weigh 1,800 g of terephthalic acid and ethylene glycol in a molar ratio of 1:1.9 and add them to the reactor, then add 2 g of ethylene glycol antimony (as a catalyst), wherein the reactor is equipped with a high-purity nitrogen port, Mechanical stirrer, water separator, condenser tube, etc. Start stirring (200r / min), heat the reaction system to 190°C, and then raise the temperature to 240°C in a temperature-programmed manner; at this temperature, the above-mentioned monomers are subjected to esterification reaction until the water output reaches 95wt% of the theoretical water output, Raise the temperature to 260°C, close the nitrogen passage valve and start vacuuming to bel...

Embodiment 3

[0059] Preparation of biodegradable branched polyethylene terephthalate-block-poly(1,4-cyclohexanedimethyl adipate-block-poly(ethylene adipate-co-adipate 1, 2-octanediol) ester multi-block copolymer, comprises the following steps:

[0060] ①Synthesis of hydroxyl-terminated polyethylene terephthalate prepolymer

[0061] Weigh 1,400 g of terephthalic acid and ethylene glycol in a molar ratio of 1:1.6 and add them to the reactor, then add 1.3 g of antimony ethylene glycol (as a catalyst), and the reactor is equipped with a high-purity nitrogen port , mechanical agitator, water separator, condenser tube, etc. Start stirring (200r / min), heat the reaction system to 190°C, and then raise the temperature to 240°C in a temperature-programmed manner; at this temperature, the above-mentioned monomers are subjected to esterification reaction until the water output reaches 95wt% of the theoretical water output, Raise the temperature to 270°C, close the nitrogen channel valve and start va...

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Abstract

The invention relates to a biodegradable branched aromatic polyester-aliphatic polyester multi-block polymer and a preparation method thereof. By combining excellent biological degradability of aliphatic polyester, excellent mechanical property, thermal performance and stability of aromatic polyester and improved physical and mechanical performances of branched aliphatic polyester, the invention provides the biodegradable branched aromatic polyester-aliphatic polyester multi-block polymer. The multi-block polymer is a branched multi-block copolymer comprising an chain segment I and a chain segment II, or a branched multi-block polymer comprising the chain segment I and a chain segment III, or a branched multi-block polymer comprising the chain segment I, the chain segment II and a chain segment III. According to the multi-block polymer, the defects of the aliphatic polyester in performance are overcome; and the multi-block polymer has the advantages of high viscosity of fused mass, high strength of the fused mass, excellent stability and the like.

Description

technical field [0001] The invention relates to a biodegradable branched aromatic polyester-aliphatic polyester multi-block copolymer and a preparation method thereof. Background technique [0002] Biodegradable materials have attracted extensive attention from academia and industry due to their environmental friendliness and biomedical applications, which can alleviate the "white pollution" problem caused by traditional polymer materials to a certain extent. Generally speaking, biodegradable materials break into smaller units through macromolecular chain breakage under physiological environment, forming a single, stable end product. Among them, the degradation can be carried out in the environment of aerobic or anaerobic microorganisms, biological activation process (such as: enzyme reaction), hydrolysis reaction and the like. Aliphatic polyesters, as the most important biodegradable materials, have attracted widespread attention and are mainly used in agriculture, packagi...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/20C08G63/685C08G63/78
Inventor 王国利张英伟原伟伟冯清正
Owner SHANGHAI DONGSHENG NEW MATERIALS
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