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Biodegradable branched co-polyester and preparation method thereof

A biodegradable and copolyester technology, applied in the field of biodegradable branched copolyester and its preparation, can solve the problems affecting the application range, molecular weight and mechanical properties, etc., to expand the application field, shorten the processing process and time , Improve the effect of processing performance

Active Publication Date: 2009-06-03
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with pure PBS, the molecular weight and mechanical properties of branched PBS are reduced to a certain extent, which affects its application range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]This embodiment is to prepare polybutylene succinate-co-succinate 1,2,4-butanetriol ester

[0032] Weigh 0.40mol of succinic acid, 0.4224mol of butanediol, and 0.0176mol of 1,2,4-butanetriol respectively, and add them to the reactor, one of which is connected to stirring, one to nitrogen protection, and the other to water separator and distillation Column; start stirring, and heat the reaction system to 150°C; after 10 minutes of reaction, the temperature is raised to 200°C by means of a temperature program; keep the temperature for 90 minutes until the system is viscous, and the obtained prepolymer is stirred vigorously at 200°C until no more splashing occurs .

[0033] After the esterification reaction, cool the system down to 155°C, remove the water separator and condenser while continuing to ventilate nitrogen, connect the vacuum pump port, close the nitrogen channel valve and start vacuuming to below 0.5mmHg, react for 10 minutes, and remove the system Small molecu...

Embodiment 2

[0036] This embodiment is to prepare polybutylene succinate-co-succinate 1,2-hexanediol ester

[0037] Weigh 0.40 mol of succinic acid, 0.396 mol of butanediol, and 0.044 mol of 1,2-hexanediol into the reactor, one of which is connected to stirring, one to nitrogen protection, and the other to water separator and distillation column; Start stirring, and heat the reaction system to 150°C; after 10 minutes of reaction, the temperature is raised to 180°C by temperature program; keep the temperature for 90 minutes until the system is viscous, and the obtained prepolymer is stirred vigorously at 200°C until no more splashing occurs.

[0038] After the esterification reaction, cool the system down to 150°C, remove the water separator and condenser while continuing to ventilate nitrogen, connect the vacuum pump port, close the nitrogen channel valve and start vacuuming to below 0.5mmHg, react for 10 minutes, and remove the system Small molecules that did not participate in the reacti...

Embodiment 3

[0041] This embodiment is to prepare polybutylene succinate-co-succinate 1,2-pentanediol ester

[0042] Weigh 0.40 mol of succinic acid, 0.066 mol of 1,2-pentanediol, and 0.374 mol of butanediol, and add them into the reactor, one of which is connected to stirring, one to nitrogen protection, and the other to water separator and distillation column; Start stirring, and heat the reaction system to 150°C; after 10 minutes of reaction, the temperature is raised to 200°C by temperature program; keep the temperature for 100 minutes until the system is viscous, and the obtained prepolymer is stirred vigorously at 200°C until no more splashing occurs.

[0043] After the esterification reaction, cool the system down to 150°C, remove the water separator and condenser while continuing to ventilate nitrogen, connect the vacuum pump port, close the nitrogen channel valve and start vacuuming to below 0.5mmHg, react for 10 minutes, and remove the system Small molecules that did not particip...

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Abstract

The invention discloses biodegradable branched co-polyester and a preparation method thereof, and belongs to the polymeric chemical field. The preparation of branched co-polyester adopts a mature esterification and fasculation process route, butane diacid and butanediol which are used as main copolymerization units performs a copolymerization action with one or more than one of lateral group-containing aliphatic dibasic acid, C3, C5 to C8 alkane diacid, terephthalic acid or tribasic acid, or performs a copolymerization action with one or more than one of lateral group-containing dibasic alcohol, C2, C3, C5 to C10 alkane diol or aliphatic trivalent alcohol, so as to obtain random branched co-polyester finally. The intrinsic viscosity of prepared co-polyester ranges from 0.6 to 2.2dl / g, the melting point ranges from 70 to 115, the degree of crystallinity ranges from 20 to 70 percent, and the weight average molecular weight ranges from 5 to 300000. The co-polyester preparation method adopts efficient a blended catalyst, so that the polymerization time is reduced greatly, and the molecular weight and the performance of the products are increased. New performances are given to polyester through quoting third components containing lateral groupsor multi-functional groups, thereby extending the application range of polyester.

Description

technical field [0001] The invention belongs to the technical field of copolyester products and preparation methods thereof, in particular to a biodegradable branched copolyester and a preparation method thereof. Background technique [0002] In recent years, with the development of the plastics industry and the enhancement of people's awareness of environmental protection, the problem of "white pollution" caused by traditional plastics (such as waste plastic films, waste plastic packaging bags, etc. to the environment) is gradually attracting widespread attention. . How to effectively solve the contradiction between the use of plastic products and environmental damage is becoming more and more important. Therefore, the research and application of various "environmentally friendly materials", especially fully biodegradable plastics, has become the focus of people's attention. Especially aliphatic polyester is becoming more and more popular as an excellent biodegradable pla...

Claims

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Application Information

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IPC IPC(8): C08G63/12C08G63/82
Inventor 郭宝华徐军高兵王国利
Owner TSINGHUA UNIV
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