聚甲醛结晶性能的改性

Improvement on Crystallization Property of POM

研究了高摩尔质量羧酸盐类成核剂HC对聚甲醛(POM)的结晶成核作用,采用示差扫描量热分析(DSC)、偏光显微镜观察(PLM)及等温结晶动力学分析等方法研究了该类成核剂对POM结晶形态、结晶度、结晶速率等的影响,并考察了其力学性能。结果表明,高摩尔质量羧酸盐类成核剂HC的加入,使POM晶粒细化,结晶诱导期缩短,显著提高了POM的结晶速率。

The nucleation effect of nucleating agent HC （mainly containing salt of high molecular carboxylic acid） on polyoxymethylene （POM） was studied, and the effects of the nucleating agent on the crystalline morphology, crystallizability and crystallization rate of POM were also studied by means of DSC, PLM and isothermal crystallization kinetics analysis. The mechanical properties of the modified POM were studied, too. The results showed the addition of nucleating agent HC made the crystal grain more fine, shortened the induction period of crystallization and increased the crystallization rate of POM greatly.