Degradable copolyester as well as preparation method and application thereof

A technology of copolyester and polyester, applied in the field of degradable polymer materials, can solve the problems of high cost, low molecular weight, poor mechanical properties and efficient biodegradation of polyester, and achieve high molecular weight, simple method, excellent mechanical strength and The effect of toughness
CN113307957AActive Publication Date: 2021-08-27TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2021-08-27

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Abstract

The invention discloses a degradable copolyester which is a random copolymer or a double-block copolymer composed of difficult-to-hydrolyze polyester fragments and easy-to-hydrolyze fragments or sites, wherein the number-average molecular weight of the copolyester is 30000 g / moL to 500000 g / moL; and the easy-to-hydrolyze fragments or sites are selected from polylactic acid with different chain segment lengths. The copolyester is high in molecular weight, free of environment-unfriendly chain extenders, good in mechanical strength and toughness, resistant to heat and good in processability, and can be independently used as plastic. In various natural environments such as water, soil, compost and the like, the copolyester can be completely degraded in the natural environments to form environment-pollution-free carbon dioxide and water. The invention also discloses a preparation method and application of the degradable copolyester.
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Description

technical field

[0001] The invention relates to the field of degradable polymer materials. More specifically, it relates to a degradable copolyester and its preparation method and application. Background technique

[0002] The increasingly severe marine plastic pollution and its harm to marine ecology and human life have attracted widespread attention. In the long run, the development and use of degradable plastic products in seawater to replace general-purpose refractory plastic products is a fundamental and effective way to prevent this problem from continuing to develop. Among all polymer materials, polyester is particularly susceptible to biodegradation by the action of water and microorganisms in the environment due to the presence of ester bonds in the chain segment, and produces environmentally friendly carbon dioxide and water. This process usually goes through three steps: 1) the material is broken under the combined action of light, oxygen, water, and biology; 2)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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