Biodegradable polyester and its preparation method

A technology for degrading polyester and biology, applied in the field of biodegradable polyester and its preparation, can solve the problems of poor processing performance, low transverse strength of the film, decreased mechanical properties, etc., and achieve better processing performance, outstanding mechanical properties, and hardness. smaller effect

Active Publication Date: 2013-01-02
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its processability is very poor, and the transverse strength of the obtained film is very low. If a small amount of multifunctional monomer is added to obtain a long-chain branched polyester product, the processability has been significantly improved, but the mechanical properties have been significantly reduced.

Method used

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  • Biodegradable polyester and its preparation method
  • Biodegradable polyester and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 118g of succinic acid, 190g of 1,4-butanediol, 15g of 1,2-octanediol, and 0.2g of tetra-n-butyl titanate into a 500mL three-necked flask equipped with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen conditions. The esterification reaction was stirred at 200° C. for 4 h. During this process, water was distilled out from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of water is twice the molar amount of succinic acid).

[0050] 0.15 g of tetraisopropyl titanate and 0.4 g of triphenyl phosphite were added to the reaction mixture as a polycondensation catalyst and heat stabilizer, respectively. The polymerization reaction was stirr...

Embodiment 2

[0054] Add 59g of succinic acid, 73g of adipic acid, 195g of 1,4-butanediol, 9g of 1,2-decanediol, and 0.3g of zinc acetate into a 500mL three-necked flask equipped with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the esterification reaction is carried out under nitrogen conditions. The esterification reaction was stirred at 210° C. for 3 h. During this process, water was distilled out from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of water is twice the sum of the molar amounts of succinic acid and adipic acid).

[0055] 0.25 g of antimony trioxide and 0.5 g of trimethyl phosphate were added to the reaction mixture as a polycondensation catalyst and heat stabilizer respectively. The poly...

Embodiment 3

[0059] 73g dimethyl succinate, 87g dimethyl adipate, 200g 1,4-butanediol, 8g 1,2-octanediol, 0.1g magnesium acetate, 0.15g tetraisooctyl titanate Add it to a 500mL three-necked flask equipped with a mechanical stirring device. After all the materials have been added, equip the flask with a condensation device, vacuumize and fill with nitrogen three times to remove the oxygen in the reaction vessel to ensure that the transesterification reaction is carried out under nitrogen conditions. The transesterification reaction was stirred at 220° C. for 3 h. During this process, methanol was distilled off from the reaction mixture as a by-product until the amount of the distillate reached 92% of the theoretically calculated amount. (The theoretically calculated amount of methanol is twice the sum of the molar weights of dimethyl succinate and dimethyl adipate).

[0060] 0.2 g of tetraisopropyl titanate and 0.4 g of triethyl phosphate were added to the reaction mixture as a polycondens...

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Abstract

The invention belongs to the field of polymer material technology, and discloses a biodegradable polyester and its preparation method. The inventive biodegradable polyester has the following repeated unit structure, wherein n=1-1,000, M=1-1,000, o=0-11, P=2-13, q=0-11, and r=0-10. The prepared product has excellent processing performance and mechanical performance and outstanding biodegradability, and can be used to substitute for the widely used PE plastic film.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a biodegradable polyester and a preparation method thereof. Background technique [0002] With the advancement of science and technology and the rapid development of human society, the production and living standards of human beings have been greatly improved. At the same time, the impact on the earth, the planet on which human beings depend, is becoming increasingly serious, far beyond the self of the earth. repair ability. Among them, the most obvious is the white pollution caused by PE plastics. After these plastics are discarded after use, they will not change in the natural environment even for decades. The accumulation of more and more PE plastic wastes has gradually developed into Significant pollution to the biological environment, waste plastics dumped in the ocean cause harm to fish resources and shipping, and waste plastics buried underground hinder rainwater ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/16C08G63/78
Inventor 赵冬云杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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