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A kind of branched aliphatic-aromatic copolyester and its synthetic method

A synthetic method and aromatic technology, applied in the field of preparation of branched aliphatic-aromatic copolyester materials, can solve the problems of poor biodegradability and large steric hindrance effect of benzene ring

Active Publication Date: 2016-10-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the branched aliphatic-aromatic copolyester, the introduction of benzene ring on the main chain improves the thermal stability of the polymer material and improves the mechanical properties of the polymer, but at the same time, due to the large steric hindrance effect of the benzene ring, the biodegradability become worse

Method used

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  • A kind of branched aliphatic-aromatic copolyester and its synthetic method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Mix 0.18mol of succinic acid, 0.22mol of terephthalic acid, 0.4356mol of 1,4-butanediol, and 0.0044mol of n-butyl glycidyl ether into the three-necked flask reactor, and add 0.05% catalyst tetrabutyl titanate Esters, one of which is connected to a sufficient amount of nitrogen protection, one is connected to a mechanical stirrer, and the other is connected to a water separator and a condenser. Under normal pressure, heat up to 100°C and stir to mix. Then the temperature was raised to 240° C. and reacted for 2 hours until the mixed liquid in the reaction system became clear, and the esterification reaction was completed. Add 1% catalyst tetrabutyl titanate and 0.001% stabilizer trimethyl phosphate, evacuate to an absolute pressure of 20Pa, and quickly raise the temperature to 240°C for 4 hours of constant temperature reaction. The rod climbing phenomenon is obvious, and the vacuum polycondensation reaction is over. A branched aliphatic-aromatic copolyester can be obtain...

Embodiment 2

[0032] Mix 0.22mol of adipic acid, 0.18mol of terephthalic acid, 0.432mol of 1,4-butanediol, and 0.048mol of 1,2-epoxyheptane into the three-necked flask reactor, add 5% catalyst dioxide For silicon, a sufficient amount of nitrogen protection is introduced into one port, a mechanical stirrer is connected to one port, and a water separator and a condenser are connected to the other port, and the system is evacuated to 1kPa. Raise the temperature to 140°C and stir to mix. Then gradually increase the temperature to 280°C, react for 3 hours, and then add a water separator to separate the water until no more liquid distills out, and the mixed liquid in the reaction system becomes clear, and the esterification reaction ends. Add 10% catalyst silicon dioxide and 0.05% stabilizer triphenyl phosphite, evacuate until the absolute pressure is below 100Pa, and quickly raise the temperature to 280°C for 3 hours of constant temperature reaction. The rod climbing phenomenon is obvious, and t...

Embodiment 3

[0035] Add 0.12 mol of adipic acid, 0.252 mol of terephthalic acid, 0.028 mol of isophthalic acid, 0.72 mol of 1,4-butanediol, and 0.08 mol of 1,2-epoxyhexane into the three-necked flask reactor, Add 0.001% catalyst tetrabutyl titanate, one port is fed with enough nitrogen protection, one port is connected with a mechanical stirrer, and the other port is connected with a water separator and a condenser pipe, and the system is vacuumed to 10kPa. Raise the temperature to 120°C and stir to mix. Then gradually increase the temperature to 220°C, react for 3 hours, and then add a water separator to separate the water until no more liquid distills out, and the mixed liquid in the reaction system becomes clear, and the esterification reaction is completed. Add 0.001% catalyst tetrabutyl titanate and ethyl orthosilicate (10:1 mass ratio) and 1% 1,3,5-trimethyl-2,4,6-tri(3,5- Di-tert-butyl-4-hydroxybenzyl)benzene and triphenyl phosphite are used as stabilizers. Vacuumize until the abso...

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Abstract

The invention belongs to the technical field of cladodified fat-aromatic copolyester material preparation, and in particular relates to a cladodified fat-aromatic copolyester and a synthesis method thereof. The cladodified fat-aromatic copolyester is prepared by: carrying out polymerization reaction on glycidyl ether or unimolecular substitution ethylene oxide cladodified monomer, aliphatic dicarboxylic acid, aromatic dicarboxylic acid and aliphatic diol with a commonly used esterification and ester exchange catalyst under the classic polyester preparation process conditions by using an esterification and vacuum polycondensation two-stage method. The prepared polyester has higher molecular weight and low terminal carboxyl content, the intrinsic viscosity of the prepared polyester is within 1.2-1.7 dl / g, and the terminal carboxyl content can be lower than 10 mol / t. The prepared copolyester has excellent mechanical property and hydrolysis resistance stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of branched aliphatic-aromatic copolyester materials, and in particular relates to a branched aliphatic-aromatic copolyester and a synthesis method thereof. Background technique [0002] Due to its advantages in strength, performance and function, and ease of use, plastic products have become more and more widely used in packaging, agriculture, construction, machinery and various aspects of society. Non-degradable plastic products will remain in the soil when they are landfilled, and some plastic products will also produce harmful gases when they are incinerated, which will easily cause landscape damage when they are discarded. With the increasingly prominent environmental problems, the application of biodegradable polyester has attracted people's attention. Aliphatic-aromatic copolyester material, on the one hand, has the advantages of low production cost of aromatic polyester, good mechanic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/42C08G63/78
Inventor 郭宝华张瑜齐治国徐军
Owner TSINGHUA UNIV