Polylactic acid radical biological degradable material and method for preparing same

A polylactic acid-based, degradable material technology, applied in the field of polylactic acid-based biodegradable materials and their preparation, can solve the problems of inability to obtain high molecular weight polymers with physical and mechanical properties

Inactive Publication Date: 2008-03-05
SHANGHAI TONG JIE LIANG BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Polylactic acid disclosed in early patent literature cannot obtain

Method used

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  • Polylactic acid radical biological degradable material and method for preparing same
  • Polylactic acid radical biological degradable material and method for preparing same
  • Polylactic acid radical biological degradable material and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 30mol of refined L-lactide, 0.3mol of Sn(Oct) 2 , 0.3mol of polybutylene succinate is added in the reactor, vacuumize and ventilate nitrogen repeatedly three times to get rid of the air in the reactor, under the environment of ventilate nitrogen (3L / min), gradually heat up (8 ℃ / 30min) to 160°C for 20 hours. A polymer having a weight average molecular weight of 198,000 was obtained.

[0032]

Embodiment 2

[0034] 30mol of refined D,L-lactide, 0.03mol of SnCl 2 , 0.3mol of polybutylene succinate is added in the reactor, vacuumize, nitrogen gas is repeatedly removed the air in the reactor three times, under the environment of nitrogen gas (3L / min), gradually heat up (10 ℃ / 30min) to 140°C for 20 hours. A polymer having a weight average molecular weight of 215,000 was obtained.

Embodiment 3-7

[0036] 30mol of refined D,L-lactide, 0.03mol of Sn(Oct) 21. A certain amount of polybutylene succinate is added in the reactor, and the air in the reactor is removed by evacuating and passing nitrogen repeatedly three times. Under the environment of passing nitrogen (3L / min), gradually heat up (12°C / 30min) to 160°C for 20 hours.

[0037] polybutylene succinate

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Abstract

The present invention belongs to the field of biodegradable material preparing and modifying technology, and is especially one kind of polylactic acid-based biodegradable material and its preparation process. The polylactic acid-based biodegradable material is prepared with lactide, tin catalyst/initiator and end hydroxyl group co-initiator in certain molar ratio and through polymerization in a reaction kettle inside nitrogen atmosphere at 110-180 deg.c for 8-20 hr. The polymer has rigid segment or flexible segment accounting for 0.1-30 mol% weight average molecular weight greater than 150,000, and possesses biodegradability, improved flexibility, raised shock resistance, etc. The present invention provides one new way for the copolymerizing modification of polylactic acid.

Description

field of invention [0001] The invention belongs to the technical field of preparation and modification of biodegradable materials, and in particular relates to a polylactic acid-based biodegradable material and a preparation method thereof. Background technique [0002] With the depletion of petroleum resources and the rising price of petroleum, the plastic industry using petroleum as raw material is facing tremendous pressure from raw material depletion and cost increase. In addition, the harm of white pollution to the environment is becoming more and more significant, so biomass is used as raw material Degradable materials have become a hot research topic. [0003] Polylactic acid (Poly lactic acid, PLA) is a type of polymer chemically synthesized from microbial fermentation product lactic acid as a monomer. It is a non-toxic, non-irritating, biocompatible, and biodegradable polymer. Ester linear biodegradable polymer materials. Lactic acid can be obtained by fermenting ...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08G63/82
Inventor 王秦峰张乃文任杰
Owner SHANGHAI TONG JIE LIANG BIOMATERIALS
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