CBT/ε-己内酯共聚酯的非等温结晶动力学研究  

Study on Nonisothermal Crystallization Kinetics of CBT/ε-Caprolactone Copolyesters

作　　者：刘玲[1] 颜春[1] 陈飞[1] 祝颖丹[1] 

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201

出　　处：《塑料科技》2015年第5期25-30,共6页Plastics Science and Technology

基　　金：中国科学院STS项目(KFJ-EW-STS-080);国家863计划项目(2012AA03A206);宁波市自然科学基金(2014A610130);宁波市石墨烯专项(2014S10004)

摘　　要：采用差示扫描量热法(DSC)研究了环状对苯二甲酸丁二醇酯(CBT)/ε-己内酯(CL)共聚酯的非等温结晶动力学,并用Avrami方程分析了共聚酯的非等温结晶动力学参数。结果表明:Avrami方程可以较好地描述共聚酯的非等温结晶过程;结晶速率随着冷却速率的增大而提高,随着共聚酯中CL单元的增加而降低。用Ziabicki方程分析了共聚酯的结晶能力,结果表明:随着CL单元的增加,共聚酯的结晶能力降低。采用Kissinger法计算了共聚酯的结晶活化能,发现其结晶活化能随着CL单元的增加而提高。The nonisothermal crystallization kinetics of cyclic butylene terephthalate （CBT）/ε-caprolactone （CL） copolyesters were investigated by using differential scanning calorimetry （DSC） under nonisothermal conditions. Avrami equation was used for determining the nonisothermal crystallization kinetic parameters of CBTICL copolyesters. The results show that： Avrami equation can describe the nonisothermal crystallization rate was found to increase with crystallization process of copolyesters. The the cooling rate, while decrease with CL units in the copolyestero The crystallizability of copolyesters was further analyzed by Ziabicki equation and the results suggest that the crystallizability of copolyesters decreases with CL units. The activation energy of copolyesters has been calculated according to the Kissinger method and increases with CL units.

关 键 词：非等温结晶 环状对苯二甲酸丁二醇酯 Ε-己内酯 共聚酯 

分 类 号：O633.14[理学—高分子化学]