摘要
利用差式扫描量热仪(DSC)研究了不同降温速率下热塑性聚酯弹性体(TPEE)的非等温结晶行为,并采用修正Avrami方程的Jeziorny法对TPEE的非等温结晶行为进行处理。结果表明,随着降温速率的增大,TPEE的结晶温度向低温方向移动,结晶峰变宽。随着TPEE中聚酯硬段比例的提高,TPEE的结晶温度提高,结晶速率变快,结晶能力变强,由Kissinger法计算得到的结晶活化能降低也证实了这一点。TPEE中聚酯硬段的提高并没有对晶体生长机制造成影响,均为二维生长。
The non-isothermal crystallization behavior of thermoplastic polyester elastomer(TPEE) at different cooling rates was studied by differential scanning calorimetry(DSC),which was treated via the Avrami equation modified by Jeziorny.The results show that with the increase of the cooling rate,the crystallization temperature of TPEE moves toward the low temperature and the crystallization peak becomes wider.As the proportion of the hard segment of the polyester in TPEE increases,the crystallization temperatue increases,crystallization rate becomes faster and the crystallization ability becomes stronger,which are also confirmed by the decrease in the crystallization activation energy calculated by the Kissinger method.However,the improvement of the hard segment of polyester in TPEE does not affect the crystal growth mechanism,and both are two-dimensional growth.
作者
汪子健
孟寒
邵如
唐龙祥
WANG Zijian;MENG Han;SHAO Ru;TANG Longxiang(School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《弹性体》
CAS
2020年第1期17-21,共5页
China Elastomerics
关键词
热塑性聚酯弹性体
聚酯硬段
聚醚软段
非等温结晶动力学
TPEE
polyester hard segment
polyether soft segment
non-isothermal crystallization kinetics
