乳酸乙醇酸共聚物(PLGA)熔体的流变性能

纺织学报 ›› 2005, Vol. 26 ›› Issue (2): 37-40.

乳酸乙醇酸共聚物(PLGA)熔体的流变性能

兰平,薛元,喻琳艳

嘉兴学院服装与艺术设计学院浙江嘉兴314001

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-04-15 发布日期:2005-04-15

Rheological behavior of lactic acid and glycolic acid(PLGA) copolymer melt

LAN Ping;XUE Yuan;YU Lin yan

Academy of Fashion & Art Design;Jiaxing University;Jiaxing;Zhejiang 314001;China

Received:1900-01-01 Revised:1900-01-01 Online:2005-04-15 Published:2005-04-15

摘要/Abstract

摘要： 采用直接法熔融缩聚制备了L-乳酸和乙醇酸共聚物PLGA ,并用锥板流变仪对PLGA的流变性能进行测试。结果表明 :PLGA熔体属于切力变稀流体 ,PLGA熔体的非牛顿指数值大于聚乳酸PLLA熔体的对应值 ,其表观粘度对剪切速率的依赖性小 ;PLGA熔体的表观粘流活化能较高 ,且在同样的切变速率下 ,PLGA熔体的表观粘流活化能大于PLLA熔体的对应值 ,其表观粘度对温度的敏感性大于PLLA熔体。

Abstract: A direct copolymerisation process was used to prepare lactic acid and glycolic acid copolymer (PLGA). Rheological behavior of PLGA melt was tested using cone and plate. It was found that PLGA melt was paeudoplasic fluid,and non Newtonian index value of PLGA melt was bigger than that of PLLA melt, which indicated that the dependence of the PLGA viscosity on shear rate was less; Under the same shear rate, the flow activation energy of PLGA was higher than that of PLLA, which indicated that the viscosity of PLGA was more sensitive to temperature.

兰平;薛元;喻琳艳. 乳酸乙醇酸共聚物(PLGA)熔体的流变性能[J]. 纺织学报, 2005, 26(2): 37-40.

LAN Ping;XUE Yuan;YU Lin yan . Rheological behavior of lactic acid and glycolic acid(PLGA) copolymer melt[J]. JOURNAL OF TEXTILE RESEARCH, 2005, 26(2): 37-40.

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