聚丙烯／八乙烯多面齐聚倍半硅氧烷复合材料非等温结晶动力学

Nonisothermal crystallization kinetics of polypropylene/octavinyl polyhedral oligomeric silsesquioxane composites

用DSC手段研究了物理共混合反应共混制备的聚丙烯(PP)/八乙烯基多面齐聚倍半硅氧烷(OvPOSS)复合材料的非等温结晶和熔融行为.结果表明:物理共混中OvPOSS具有β晶成核剂的作用,反应共混时PP的β晶消失,成核作用更为显著,结晶速率更高.采用Ozawa法和莫志深法对材料的非等温结晶动力学进行了研究,表明材料的结晶动力学行为符合Mo-Avinm-Ozawa方程.

The crystallization and melt behavior of physical blending and reactive blending polypropylene （PP）/octavinyl polyhedral oligomeric silsesquioxane （OvPOSS） composites were studied with differential scanning calorimetry tests. For the physical blending composite, OvPOSS could act as β nucleating agents and increase the crystallization rate. While for the reactive blending composite, the β-form crystalline disappeared and the crystallization rate increased greatly due to the significant nucleating effect of reactive OvPOSS. The nonisothermal crystallization kinetics of PP/OvPOSS composites was studied with Ozawa＇s method and Mo＇s method and the crystallization kinetics behavior of the materials agreed with the Mo- Avinm-Ozawa equation.