文献类型：期刊文献

中文题名：聚2-吡咯烷酮的非等温结晶动力学

英文题名：Nonisothermal Crystallization Kinetics of Poly(2-pyrrolidone)

作者：黄文景[1];陈涛[1];赵黎明[2];魏杰[1];邱勇隽[2];骆佳伟[1]

机构：[1]华东理工大学材料科学与工程学院上海市先进聚合物重点实验室,上海200237;[2]华东理工大学生物反应器工程国家重点实验室发酵工业分离提取技术研发中心生物工程学院,上海200237

年份：2017

卷号：30

期号：3

起止页码：314

中文期刊名：功能高分子学报

外文期刊名：Journal of Functional Polymers

收录：北大核心:【北大核心2014】；CSCD:【CSCD2017_2018】；

基金：国家高技术研究发展计划(863)课题(2014AA021202);上海市自然科学基金(17ZR1407200);华东理工大学大学生创新创业训练计划(X16041)

语种：中文

中文关键词：聚2-吡咯烷酮;非等温结晶;活化能

外文关键词：poly（2-pyrrolidone）; nonisothermal crystallization; activation energy;

摘要：用差示量热扫描热分析仪(DSC)测试了不同降温速率下聚2-吡咯烷酮(PPD)样品的温度-热焓曲线,样品黏均分子量为2.2×10~4,熔点为272℃。采用Jeziorny法、Ozawa法和莫志深法分析了PPD的非等温结晶动力学。结果表明,在给定降温速率范围内,Ozawa法不适用于描述PPD的非等温结晶动力学过程,Jeziorny法只适用于描述PPD的主结晶阶段,而莫志深法能很好地描述整个结晶过程。Jeziorny法处理结果表明,PPD主结晶阶段的Avrami指数(n)为1.68~1.78,晶体生长为准二维生长。莫志深法处理结果表明,在单位结晶时间里达到某一相对结晶度所需的降温速率随相对结晶度的增加而增大。用Kissinger方程求得PPD的非等温结晶活化能为-31.9kJ/mol。
Temperature-enthalpy curves of poly（2-pyrrolidone）（PPD） were investigated using Differential Scanning Calorimeter （DSC）.The viscosity-average molecular weight of PPD sample is 2.2×10~4 and the melting temperature is 272℃.The nonisothermal crystallization kinetics of PPD were analyzed by Jeziorny model,Ozawa model and Mo model,respectively.Ozawa model is inappropriate for analysing nonisothermal crystallization kinetics of PPD,and Jeziorny model is only suitable for primary crystallization stage.However,it can be described perfectly by Mo model.The Avrami constant n calculated by Jeziorny model ranges from 1.68 to 1.78,indicating that PPD crystals grow in quasi-twodimensional direction in primary crystallization stage.Mo model gives the information that faster cooling rate is required to achieve a certain degree of crystallinity in the unit crystallization time.Activation energy for nonisothermal crystallization of PPD is-31.9kJ/mol by Kissinger equation.