中国塑料

中国塑料 ›› 2008, Vol. 22 ›› Issue (07): 42-46 .DOI: 10.19491/j.issn.1001-9278.2008.07.008

• 材料与性能 • 上一篇    下一篇

POM /TPU共混物非等温结晶动力学研究

刘春林，周如东，丁永红，吴盾   

  1. 1.江苏工业学院材料科学与工程学院，江苏常州213164;2.常州市高分子新材料重点实验室，江苏常州213164
  • 收稿日期:2008-03-07 修回日期:1900-01-01 出版日期:2008-07-26 发布日期:2008-07-26

Study on Non-isothermal Crystallization Kinetics of POM/TPU Blends

LIU Chun-lin，ZHOU Ru-dong，DING Yong-hong，WU Dun   

  1. 1 .School of Materials Science and Engineering, Jiangsu Polytechnic University, C;hangzhou 213164，China;2. Polyrmer Materials Key Lab of C;hangzhou, C;hangzhou 213164，China
  • Received:2008-03-07 Revised:1900-01-01 Online:2008-07-26 Published:2008-07-26
  • Contact: LIU Chun-lin

摘要： 采用差示扫描量热法(DSC}研究了不同冷却速率下聚甲醛( POM)以及POM/热塑性聚氨酷弹性体(TPU)共混物的非等温结晶过程，分别采用Jeziorny法、Ozawa法和Mo法进行处理。结果表明:随着冷却速率的增大，POM及其共混物的结晶峰都变宽，结晶峰值温度(Tc)都降低;在相同冷却速率下，POM /TPU共混物的Tc。较纯POM有所提高;Jeziorny法和Mo法处理非等温结晶过程比较理想，而由于次级结晶的存在Ozawa法并不适用;Jeziorny法和Mo法处理所得的数据表明，TPU的加人能够提高POM的结晶速率，减小半结晶时间(t1/2)，并且导致POM的结晶成核和生长发生了改变。

关键词: 聚甲醛, 热塑性聚氨酷弹性体, 非等温结晶动力学

Abstract: The non-isothermal crystallization behavior of POM and POM/TPU blends were investigated by differential scanning calorimetry (DSC).The Jeziorny, Ozawa, and Mo methods were employed to analyze the DSC data. The results showed that the width of the crystallization peak was broadened，the
crystallization temperature(Tc) decreased with increasing cooling rate.At the same cooling rate, Tc of the blends was higher than that of neat POM. Jeziorny method could well he used to treat the nonisothermal crystallization. It showed that TPU increased the crystallization rate, decreased the half crys-tallization time(t1/2)，and changed the nucleating mechanism during crystallization of POM. However,Ozawa method did not fit the polymer blends, because it ignored the influence of secondary crystalliza-tlon.

Key words: polyoxymethylene, thermoplastic polyurethane clastomer, non-isothermal crystallization

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