聚L-丙交酯的制备及其热稳定性能的研究  

Studies on the Synthesis and Thermal Stability of Poly(L-lactide)

作　　者：葛海雄[1] 隋峥嵘[1] 潘孝春[1] 崔照云[1] 姜标[1] 

机构地区：[1]中国科学院上海有机所,上海200032

出　　处：《北京大学学报（自然科学版）》2001年第2期251-254,共4页Acta Scientiarum Naturalium Universitatis Pekinensis

摘　　要：对聚丙交酯的合成和热稳定性进行了研究。单体重结晶次数、辛酸亚锡浓度、聚合时间等条件均是影响聚合物特性粘数的重要因素。热稳定剂对聚丙交酯的分子量几乎没有影响。优化聚合条件可以获得粘均分子量大于 2 0 0 0 0 0的聚丙交酯材料 ,聚合结果具有良好的重复性。实验表明在高于聚合物熔点温度以上 ,聚丙交酯表现出热不稳定性。热稳定剂ULTRONOX 6 2The synthesis and thermal stability of poly( L lactide)were investigated.The key factors affecting the polymer intrinsic viscosity were found to be monomer recrystallization times,stannous octoate concentration and polymerization time.The thermal stabilizing agent did not significantly affect the polymer molecular weight.The polymer with a viscosity average molecular weight beyond 200?000 was fairly reproducible by optimizing the polymerization conditions.It was found that poly( L lactide)is thermally unstable above its melting temperature.The thermal stabilizing agent,ULTRANOX 626A,appeared to be able to reduce the extent of the thermal degradation of the polymer.

关 键 词：聚L-丙交脂 可生物降解 特性粘数 热稳定性 高分子材料 L-乳酸 制备 粘均分子量 

分 类 号：O633.14[理学—高分子化学]