Method for preparing degradable copolyester by trinary reactivity blending

A reactive and copolyester technology, which is applied in the field of ternary reactive blending to prepare degradable copolyesters. It can solve the problems of high price, limited application range of materials, poor mechanical and thermal properties, etc., and increase the molecular weight of polymers. , easy reaction operation, and simple synthesis process

Inactive Publication Date: 2008-01-16
NANCHANG UNIV
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The environmentally degradable materials currently researched are expensive, and their mechanical and thermal properties are inferior to those of traditional thermoplastics. These defects limit the application range of materials.

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

[0008] Add a certain proportion of 0.1mmol D, L-oligolactic acid and 91.9mmol polyethylene glycol in a nitrogen bottle, and heat at 100°C for 2h, then raise the temperature to 200°C, keep it for 2h, keep it at 200°C, and vacuum for 2h. The reactive blend required for the experiment was obtained. Add 8mmol polybutylene terephthalate, oligomeric lactic acid and polyethylene glycol copolymer into the flame-dried three-necked bottle. The reaction was heated to 110°C, during the heating process, a vacuum was drawn for a period of time, and then N 2 , This process is repeated 5-6 times. Pass N at 110°C 2 , keep for 1 hour. Then heated to 260°C, vacuumed, and the reaction was maintained for 1.5 hours. Stop heating, cool down after the reaction stops, add to chloroform solution to dissolve, and then pour the solution into a large amount of methanol to obtain a white polymer precipitate. The filtrate was dried under vacuum at 40°C.

Embodiment 2

[0010] Add a certain proportion of 29.9mmol D, L-oligolactic acid and 0.1mmol polyethylene glycol in a nitrogen bottle, and heat at 100°C for 2h, then raise the temperature to 200°C, keep it for 2h, keep it at 200°C, and vacuum for 2h. The reactive blend required for the experiment was obtained. Add 70mmol polybutylene terephthalate, oligomeric lactic acid and polyethylene glycol copolymer into the flame-dried three-necked bottle. The reaction was heated to 110°C, during the heating process, a vacuum was drawn for a period of time, and then N 2 , This process is repeated 5-6 times. Pass N at 110°C 2 , keep for 1 hour. Then heated to 260°C, vacuumed, and the reaction was maintained for 1.5 hours. Stop heating, cool down after the reaction stops, add to chloroform solution to dissolve, and then pour the solution into a large amount of methanol to obtain a white polymer precipitate. The filtrate was dried under vacuum at 40°C.

Embodiment 3

[0012] Add a certain proportion of 5mmol polyglycolide and 59mmol polyethylene glycol in a nitrogen bottle, and heat it at 100°C for 2h, then raise the temperature to 200°C, keep it for 2h, keep it at 200°C, and vacuum it for 2h to get the laboratory. Reactive blends required. Add 36mmol polybutylene terephthalate, polyglycolide and polyethylene glycol copolymer into the flame-dried three-necked bottle. The reaction was heated to 110°C, during the heating process, a vacuum was drawn for a period of time, and then N 2 , This process is repeated 5-6 times. Pass N at 110°C 2 , keep for 1 hour. Then heated to 260°C, vacuumed, and the reaction was maintained for 1.5 hours. Stop heating, cool down after the reaction stops, add to chloroform solution to dissolve, and then pour the solution into a large amount of methanol to obtain a white polymer precipitate. The filtrate was dried under vacuum at 40°C.

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

No PUM Login to view more

Abstract

Disclosed is a method of preparing a degradable copolyester by means of ternary reactive blend. The present aliphatic polyester and diol have a reactive blend, then have a melting state transesterification reaction with aromatic polyester to generate degradable fat / aromatic copolyester. The invention has the advantages that the aliphatic polyester is inserted into the aromatic polyester effectively, the molecular weight of the polymer can be improved, and the copolyester is given with the degradation performance. The invention does not use any catalyst during the synthesis, and has the advantages of simple synthesis process, easy reaction operation and cheap and available raw materials. The copolyester either has certain of mechanical property or certain of degradation property.

Description

technical field [0001] The invention relates to a method for preparing degradable copolyester by three-way reactive blending, in particular to a three-way reactive blending method for reactive blending of aromatic polyester, aliphatic polyester and diol to prepare degradable copolyester. Method for degrading copolyesters. Background technique [0002] In recent years, people have paid more and more attention to the surrounding living environment, and environmentally friendly materials have been developed rapidly. Environmentally degradable polyesters have shown excellent performance in terms of mechanics and biodegradation. At present, many materials have been used to make degradable sutures, bone fixation materials, mulch, beverage bottles, etc. At present, many new biodegradable materials have been researched and developed, such as polylactide, polyglycolide, polycaprolactone, polyamino acid, polyanhydride and so on. The environmentally degradable materials currently res...

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): C08G63/91C08G63/183C08G63/08
Inventor 陈义旺朱祥军吴立传黄笔武
Owner NANCHANG UNIV
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap