High-resilience polylactic acid segmented copolymer and preparation method thereof

A technology of block copolymer and polylactic acid, which is applied in the field of high resilience polylactic acid block copolymer and its preparation, can solve the problems of complex molecular structure, difficulty in consistent block structure, poor high resilience and the like
CN112062939AActive Publication Date: 2020-12-11CHANGZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGZHOU UNIV
Publication Date
2020-12-11

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Abstract

The invention relates to a high-resilience polylactic acid segmented copolymer and a preparation method thereof, and relates to the technical field of high polymer material synthesis. The invention discloses an ABA (Acrylonitrile Butadiene Styrene) type triblock copolymer (PLAbPBSObPLA) of polylactic acid-b-poly (butylene succinate-co-diphenyl ether dicarboxylate) ester-b-polylactic acid. The preparation method comprises the following steps: preparing hydroxyl-terminated poly (butylene succinate-co-diphenyl ether dicarboxylic acid butanediol) ester by taking 1, 4-butanediol, succinic acid anddiphenyl ether dicarboxylic acid as raw materials, and performing ring-opening polymerization reaction on hydroxyl-terminated polyester serving as a macromolecular initiator and lactide (LA) to prepare the polylactic acid segmented copolymer. The method is simple to operate, can perform polymerization through a common device, and is easy for industrial production. The block copolymer obtained by the invention has excellent resilience and biodegradability, conforms to the development trend of resource-saving and environment-friendly high polymer materials, and has a wide application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high resilience polylactic acid block copolymer and a preparation method thereof.

[0002] technical background

[0003] Due to the existence of polymer segments with different properties in the structure of block copolymers, microphase separation is formed, showing very unique properties. It has a wide range of applications in many fields, especially as a thermoplastic elastomer, binder and surfactant, and has attracted much attention.

[0004] As a block-type thermoplastic elastomer, its structure needs to meet two points: ①It consists of a large number of soft blocks and a small amount of hard blocks. The soft and hard blocks do their job, with the soft block providing pliable elasticity while the hard block provides strength and stiffness. ②ABA type only or (A-B) n Only multi-block copolymers with a type structure exhibit good resilience. In the mul...

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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