对叔丁基杯[8]芳烃成核剂对聚乳酸结晶行为的影响  

Effect of p-tert-Butylcalix[8] arene Nucleating Agent on Crystallization of Polylactic Acid

作　　者：温亮[1] 辛忠[1] 胡东康[1] 

机构地区：[1]华东理工大学联合化学反应工程研究所化学工程联合国家重点实验室,上海200237

出　　处：《石油化工》2010年第9期1001-1005,共5页Petrochemical Technology

基　　金：上海市科委学科带头人计划项目(10XD1401500);高等学校博士学科点专项科研基金项目

摘　　要：用DSC和POM技术分析了新型成核剂对叔丁基杯[8]芳烃(TBC8-d)对聚乳酸结晶行为的影响。实验结果表明,TBC8-d是一种高效的聚乳酸成核剂,与纯聚乳酸相比,加入TBC8-d的聚乳酸的结晶温度和相对结晶度分别提高了14.1℃和11.1%;且TBC8-d的成核能力优于传统成核剂滑石粉。等温结晶动力学研究表明,随结晶温度的升高,TBC8-d的加入使聚乳酸的半结晶时间缩短,结晶速率常数增大;用TBC8-d成核的聚乳酸的结晶生长方式为异相成核的三维球晶生长。Effects of nucleating agent p-tert-butylcalix[8]arene（TBC8-d） on crystallization and melting behaviour of polylactic acid（PLA） were studied by means of DSC and POM.The results showed that TBC8-d was a good nucleating agent and after addition of TBC8-d,crystallization temperature and relative crystallinity of PLA increased by 14.1 ℃ and 11.1%,respectively.The nucleating ability of TBC8-d was stronger than that of the conventional nucleating agent talcum powder.Isothermal crystallization kinetics of PLA showed that addition of TBC8-d could decrease the half crystallization time and increase the crystallization rate constant.The crystallization of PLA with TBC8-d nucleating agent was through three-dimension spherulite growth with heterogeneous nucleation.

关 键 词：成核剂 聚乳酸 结晶 对叔丁基杯芳烃 

分 类 号：TQ316.6[化学工程—高聚物工业]