中国塑料 ›› 2010, Vol. 24 ›› Issue (12): 52-56 .DOI: 10.19491/j.issn.1001-9278.2010.12.010

• 材料与性能 • 上一篇    下一篇

POM与POM/碳酸钙复合材料非等温结晶动力学研究

惠江涛 陈正广 李云勇 周维燕 周涛 张爱民   

  1. 四川大学高分子研究所
  • 收稿日期:2010-09-13 修回日期:1900-01-01 出版日期:2010-12-26 发布日期:2010-12-26

Study on Non-isothermal Crytallization Kinetics of POM and POM/ Calcium Carbonate Composites

Jiangtao HUI Zhengguang CHEN Yunyong LI Weiyan ZHOU Tao ZHOU Aimin ZHANG   

  • Received:2010-09-13 Revised:1900-01-01 Online:2010-12-26 Published:2010-12-26

摘要: 采用差示扫描量热仪研究了聚甲醛(POM)和POM /碳酸钙复合材料在不同降温速率下的非等温结晶行为,并用Jeziorny法和莫志深法计算了POM及其复合材料的非等温结晶动力学参数。结果表明:提高降温速率,POM与POM/碳酸钙复合材料的结晶峰均向低温方向移动,且结晶放热峰逐渐变宽;降温速率为5、10、15和20 ℃/min时对应POM/碳酸钙复合材料的结晶峰峰值和结晶放热焓分别为144.6、142.4、141.2、140.2 ℃和177.4、152.2、148.0、137.2 J/g;加入碳酸钙的使POM的结晶温度提高,结晶速率加快,其在体系中起到了异相成核的作用。

关键词: 聚甲醛, 动力学, 碳酸钙, 非等温结晶

Abstract: The non-isothermal crystallization kinetics of polyoxymethylene (POM) and polyoxymethylene/calcium carbonate at different cooling rates was investigated using differential scanning calorimetry (DSC). The parameters of non-isothermal crystallization kinetics were obtained through Jeziorny and MO methods. It showed that the increase of cooling rates made the crystallization peaks of POM and POM/calcium carbonate move towards lower temperature and become wider. When the cooling rates was 5℃,10℃,15℃, and 20℃/min, the crystallization temperature peaks and crystallization heat of POM/calcium carbonate system were 144.6, 142.4, 141.2, 140.2℃ and 177.4, 152.2, 148.0, 137.2 J/g, respectively. Acting as a nucleating agent, calcium carbonate increased the crystallization temperature and accelerated the crystallization rate.

Key words: polyoxymethlene, kinetics, calcium carbonate, non-isothermal crystallization