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Degradable polyester-polycarbonate copolymer with high gas barrier property as well as preparation method and application thereof

A gas barrier and polycarbonate technology, applied in the field of polymer materials, can solve the problems of degradable polyester mechanical properties, poor heat resistance gas barrier performance, etc., to achieve improved gas barrier performance, excellent comprehensive performance, excellent gas barrier performance effect

Pending Publication Date: 2022-01-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a degradable high gas barrier polyester-polycarbonate copolymer, its preparation method and application, to overcome the poor mechanical properties, heat resistance and gas barrier properties of existing degradable polyester Shortcomings

Method used

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  • Degradable polyester-polycarbonate copolymer with high gas barrier property as well as preparation method and application thereof
  • Degradable polyester-polycarbonate copolymer with high gas barrier property as well as preparation method and application thereof
  • Degradable polyester-polycarbonate copolymer with high gas barrier property as well as preparation method and application thereof

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preparation example Construction

[0045] A method for preparing a degradable high gas barrier polyester-polycarbonate copolymer provided by an aspect of the embodiments of the present invention includes:

[0046] (1) Under a protective atmosphere, the first mixed reaction system comprising carbonic acid diester, the first dihydric alcohol, and the first transesterification catalyst is subjected to transesterification at 90 to 220° C., and the first intermediate product is formed after completion ;

[0047] (2) Under protective atmosphere, make the catalyst containing bio-based aromatic dibasic acid and / or esterification thereof, adipic acid and / or esterification thereof, the second glycol, the second esterification or transesterification The second mixed reaction system is subjected to esterification or transesterification reaction at 140-240°C, and the second intermediate product is obtained after completion;

[0048](3) The third mixed reaction system comprising the first intermediate product, the second in...

Embodiment 1

[0116] 56.8g (0.63mol) of dimethyl carbonate, 41.2g (0.21mol) of tricyclodecane dimethanol and 0.1% tetrabutyl titanate of the theoretical mass of the polycarbonate tricyclodecane dimethanol oligomer are put into the reaction In the container, under the condition of nitrogen protection, the temperature was gradually raised to 90°C, and the reaction was carried out for 36.0h. After the end, the temperature was lowered to room temperature at a cooling rate of 10°C / min, and then kept in a nitrogen atmosphere for 1h to obtain polycarbonate tricyclodecane Dimethyl ester oligomers.

[0117] 38.7g (0.225mol) of 2,5-thiophene dicarboxylic acid, 40.2g (0.275mol) of adipic acid, 117.8g (0.6mol) of tricyclodecane dimethanol and poly-2,5-thiophene dicarboxylate Put 0.1% tetrabutyl titanate of the theoretical mass of tricyclodecane dimethanol ester oligomer into the reactor, and gradually raise the temperature to 240°C under the condition of nitrogen protection, and react for 4.0h. The te...

Embodiment 2

[0126]56.8g (0.63mol) of dimethyl carbonate, 82.4g (0.42mol) of tricyclodecane dimethanol and 0.2% tetrabutyl titanate of the theoretical mass of the polycarbonate tricyclodecane dimethanol oligomer are put into the reaction In the container, under the condition of nitrogen protection, the temperature was gradually raised to 90°C, and the reaction was carried out for 30.0h. After the end, the temperature was lowered to room temperature at a cooling rate of 20°C / min, and then kept in a nitrogen atmosphere for 2h to obtain polycarbonate tricyclodecane Dimethyl ester oligomers.

[0127] 38.7g (0.225mol) of 2,5-thiophene dicarboxylic acid, 40.2g (0.275mol) of adipic acid, 157.07g (0.8mol) of tricyclodecane dimethanol and poly-2,5-thiophene dicarboxylate Put 0.01% tetrabutyl titanate of the theoretical mass of tricyclodecane dimethanol ester oligomer into the reactor, and gradually raise the temperature to 220°C under the condition of nitrogen protection, and react for 6.0h. The t...

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Abstract

The invention discloses a degradable polyester-polycarbonate copolymer with high gas barrier property as well as a preparation method and application thereof. The structural formula of the degradable polyester-polycarbonate copolymer with the high gas barrier property is shown in the description, wherein R1 is a structural unit of bio-based aromatic dibasic acid, R2, R3 and R4 are cyclic dihydric alcohol or a structural unit formed by combining aliphatic dihydric alcohol and cyclic dihydric alcohol, x, y and z are integers of 1-10, and m is an integer of 15-150; the bio-based aromatic binary acid comprises thiophenedicarboxylic acid; and the cyclic dihydric alcohol comprises any one or a combination of more than two of tricyclodecane dimethanol, tricyclodecane diol and tetracyclic diol. The degradable polyester-polycarbonate copolymer with the high gas barrier property has excellent gas barrier property, the ester bond density of a polymer molecular chain segment is improved, so that the degradation rate is improved. Meanwhile, dihydric alcohol is added to adjust the mechanical property, the heat resistance and the like, and the comprehensive performance of the copolymer is excellent.

Description

technical field [0001] The invention relates to a copolymer, in particular to a degradable high gas barrier polyester-polycarbonate copolymer and its preparation method and application, belonging to the technical field of polymer materials. Background technique [0002] Common degradable polyesters such as polyglycolic acid (PGA), polylactic acid (PLA), polycaprolactone (PCL), polyhydroxyalkanoate (PHA), etc. are all aliphatic polyesters, although the degradation of these polyesters The performance is very good, but the mechanical properties, heat resistance and gas barrier properties are poor. Polybutylene terephthalate adipate (PBAT) is also a well-known degradable polyester. Its structure contains not only flexible aliphatic segments, but also rigid aromatic segments, so its mechanical properties, heat resistance Compared with the aliphatic degradable polyesters, the performance and gas barrier properties have been improved, but the gas barrier properties are still not g...

Claims

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Application Information

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IPC IPC(8): C08G63/64C08G63/85C08G63/86C08L69/00
CPCC08G63/64C08G63/85C08G63/863C08L69/005C08L2201/06C08L2201/14
Inventor 张小琴王静刚王潜峰胡晗高瑞雪朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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