摘要
据ＤＳＣ升温过程中会同时发生熔融、重结晶，利用只有１个最大值的初始晶体熔点分布函数和结晶生长速率函数建立了ＰＥＴ的ＤＳＣ过程模型，计算模拟了ＨＯＬＤＳＷＯＲＴＨ的３组实验结果。理论曲线和实验曲线较好的吻合说明ＰＥＴ熔融双峰起因于初始晶体的熔融、重结晶和再熔融。理论计算和分析较清楚全面地说明了结晶温度、结晶时间和ＤＳＣ升温速率对ＰＥＴ熔融双峰的形成产生影响的基理，还证明ＤＳＣ升温过程中发生熔融重结晶并不影响ＤＳＣ结晶度的最终结果。
A mathematical model based on the melting and recrystallization of an initial distribution of melting temperatures containing only one maximum and two inflection points can correctly predict the melting behavior of PET in a scanning calorimeter. The simulated DSC curves are produced that agreed well with experimental DSC curves performed by Holdsworth et al. The model has been used to analyse the origin of dual endotherms of PET with specific thermal histories, thereby the effect of changing crystallization temperature and time as well as the heating rate in the DSC heating scan on the melting behavior of the PET specimens can be explained.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第5期9-14,共6页
Polymer Materials Science & Engineering
基金
联合化学反应工程国家重点实验室华东理工大学固定床实验室开放基金
关键词
聚对苯二甲酸
乙二酯
重结晶
熔融聚合
模拟
DSC
differential scanning calorimeter, poly(ethylene terephthalate), recrystallization
