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/碳酸钙复合体系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。
The non-isothermal crystallization kinetics of polyoxymethylene （POM） and polyoxymethylene/calciurn 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/ealcium 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.
出处
《中国塑料》
CAS
CSCD
北大核心
2010年第12期52-56,共5页
China Plastics
关键词
聚甲醛
碳酸钙
非等温结晶
动力学
polyoxymethlene
calcium carbonate
non-isothermal crystallization
kinetics
