In vitro degradation of PGA, PLA and its blends produced by melt spinning，2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）-中国聚合物网,论文下载

In vitro degradation of PGA, PLA and its blends produced by melt spinning

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关键词：

Polyglycolic acid (PGA) Polylactic acid (PLA) blend
in vitro degradation

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925K

所属学科：

分子表征

来源：

2009先进纤维与聚合物材料国际学术会议（ICAFPM，10.21-10.24，上海）

简介：

Sevenkindsofblendfiberswithdifferentproportionsofpolyglycolicacid(PGA)andpolylacticacid(PLA)(PGA/PLA:100/0,90/10,70/30,50/50,30/70,10/90,0/100))wereproducedbymelt-spinning.Thedegradationbehaviorsoftheblendfiberswereinvestigatedwithregardtothemassloss,tensileproperties,meltingpoint,crystallinityandmorphologyoffibersbyimmersingtheminphosphatebufferedsolution(PBS)(pH=7.4)at37℃foraperiodoftime.TheexperimentalresultsshowedthattheoperationofblendingPGAwithPLAwereeasierthancopolymerizationofthem,andtheobtainedblendfiberswereingoodperformance,regardlessofitstensile,crystallinityorappearance.PGAcompletelydegradedin4weeks,andPGA/PLA(90/10)alsolostitsstrengthafter3.5weeks.PGA/PLA(70/30)andPGA/PLA(50/50)hadobviouschangesintensilestrengthandmasslossafter4weeks.ThechangesofPGA/PLA(30/70)andPGA/PLA(10/90)wererelativelysmall,andPLAhadlittlechanges.ThedegradationrateoftheblendsdecreasedwiththeincreaseofPLA.

作者：

WANG Hongying, ZHANG Peihua, GUO Zheng

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2010-03-24 15:45:29

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