PA66／可反应性纳米SiO2复合材料的非等温结晶动力学

摘要

PA66/reactable nano-SiO2 composites were prepared in a twin-screws extruder by melt compounding. The non-isothermal crystallization of the composites and neat PA66 was studied through Jeziorny and Mo methods based on DSC analysis. It showed that reactable nano-SiO2 had a strong heterogeneous nucleation effect on PA66 matrix. Its addition increased the crystallization rate of PA66, and led to changes in crystal structure, growth mechanism, and activation energy of PA66.%通过双螺杆挤出机制备出聚酰胺（PA）66／可反应性纳米SiO2（RNS）复合材料，采用Jeziorny法和Mo法对其非等温结晶行为进行了研究。结果表明，RNS具有较强的异相成核能力，能提高PA66的结晶速率，并使PA66的晶体结构和生长机制发生改变；通过对比PA66及其复合材料的结晶活化能发现RNS能够降低PA66的结晶活化能。