Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Polylactic acid copolymer with high glass-transition temperature and preparation method thereof

A technology of polylactic acid copolymer and transition temperature, which is applied in the field of polylactic acid copolymer and its preparation, can solve the problems of low glass transition temperature, energy consumption, and highly toxic carbonyl chloride, etc., and achieve the effect of simple preparation method

Active Publication Date: 2014-12-31
JIANGSU SUPLA BIOPLASTICS CO LTD
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application No. 200580024916.X discloses a high molecular weight polylactic acid copolymer with excellent heat resistance, but its raw material phosgene is highly toxic; application No. 201110385357.2 discloses a polylactic acid copolymer and a preparation method thereof. Methods The polylactic acid copolymer prepared with lactic acid monomer and comonomer as the main raw material has high molecular weight, but the lactic acid monomer used is aqueous lactic acid aqueous solution, and the dehydration reaction needs to be increased for 0.5-3h before the polymerization reaction, which is time-consuming , energy consumption and glass transition temperature is not high

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 2

Embodiment 2

[0025] Example 3

Embodiment 3

[0027] Example 4

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
Login to View More

PUM

PropertyMeasurementUnit
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
glass transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention discloses a polylactic acid copolymer with high glass-transition temperature and a preparation method thereof. Lactide and copolymerization monomer as main raw materials are subjected to ring opening polymerization and polycondensation reactions in the presence of a catalyst, so as to prepare the polylactic acid copolymer. The copolymer contains an aromatic diacid monomer unit and a diol monomer unit with ring structure, has weight average molecular weight of 3-300000 and the glass-transition temperature of 110-200 DEG C. The preparation method of the invention is simple, the raw material is lactide rather than a lactic acid solution, and the aromatic dicarboxylic acid rather than non phosgene or oxalic acid is used. By adjusting the ratio of materials for ring opening polymerization, can be simple, polylactic acid copolymers with different monomer unit ratio can be precisely designed, and the prepared polylactic acid copolymer has high molecular weight and glass transition temperature up to 200 DEG C.

Description

technical field [0001] The invention belongs to the field of biodegradable polymer materials, in particular to a polylactic acid copolymer with a high glass transition temperature and a preparation method thereof. Background technique [0002] Polylactic acid is a high molecular polymer prepared from lactic acid obtained by starch fermentation as the main raw material. Due to its good biocompatibility, degradation performance and non-toxic and non-irritating to the human body, it can replace traditional materials and is widely used in medical treatment. , pharmacy, agriculture, packaging industry, clothing industry and other fields, and my country's polylactic acid production raw material - corn is abundant, and the polylactic acid industry has broad prospects. [0003] As a crystallizable material, polylactic acid has replaced traditional general-purpose plastics in many aspects, but its glass transition temperature is below 60 °C, which limits the wider application of polyl...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/181C08G63/08C08G63/78
Inventor 吴迪林育锋张简邦宏吴中仁
Owner JIANGSU SUPLA BIOPLASTICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products