【摘要】 采用差示扫描量热法(DSC)研究了实心玻璃微珠(Solid Glass Microsphere)含量对聚四氟乙烯/实心玻璃微珠(PTFE/SGM)复合材料熔融结晶行为的影响,并通过Jeziorny法研究了该复合材料的非等温结晶动力学。结果表明:当SGM含量为15%时,PTFE/SGM复合材料的结晶度达到极大值;SGM对PTFE有异相成核作用,提高了PTFE的结晶速率;SGM含量对PTFE/SGM复合材料的结晶温度没有规律性影响;Jeziorny法可以用于分析PTFE/SGM复合材料的非等温结晶动力学过程;PTFE采取多种结晶机理进行阶段性结晶,而且SGM含量的变化不会改变PTFE的结晶机理。更多还原

【Abstract】 Effects of SGM content in PTFE/SGM composites on behavior of melt crystallization were studied by differential scanning calorimetry(DSC).The Jeziorny equation was used to describe the non-isothermal crystallization process of PTFE/SGM composites.The results show that the crystallinity of PTFE composites reaches a maximum value as the content of SGM increases up to 15%.The SGM exhibited a remarkable heterogeneous nucleation activity and enhanced the crystallization rate of PTFE/SGM composites.The regular influence of SGM content on the crystallization rate of PTFE/SGM composites was not observed.The non-isothermal crystallization kinetics of PTFE/SGM composites was analyzed successfully with the Jeziorny method.It was found that the crystallization mechanisms of PTFE were not affected by the change of SGM content and several crystallization mechanisms were taken in the crystallization process of PTFE.更多还原