摘要
采用低剪切应力下分散混合与普通熔融混合方法制备出聚丙烯/无机纳米粒子复合材料。使用扫描电子显微镜(SEM)观察其脆断表面发现;采用低剪切应力下分散混合方法制备的试样中纳米粒子以纳米尺度均匀分散于树脂基体中,而普通熔融共混方法制备的试样中,纳米粒子多以十几个以上的粒子团聚体形式存在。采用示差扫描量热(DSC)研究了聚丙烯及其复合材料的非等温结晶动力学,通过对t1/2、Zc、n和ΔE等结晶动力学参数的分析,证明了在同等含量下,纳米粒子以纳米尺寸均匀分散的聚丙烯/纳米碳酸钙复合材料更容易结晶,且结晶速率更快。
PP/nano-meter CaCO3 composites were prepared by means of mixed blending and general melt blending in low shear field, and the frozen fractured surfaces of the composites were studied by means of SEM. The results showed the nano-meter particles well dispersed in the PP matrix in nano-meter scale by mixed blending in low shear field, while the nano-meter particles in the composite prepared by general melt blending in low shear field were in the form of aggregates of more than 10-particle.The nonisothermal crystallization kinetics of PP and PP/ nano-meter CaCO3 composites were studied by means of DSC. The results of the analysis of the parameters of the crystallization kinetics, such as t1/2, Zc n and △E, showed when the content of the nano-meter particles was the same, the PP/nanp-meter CaCO3 composites, in which the nano-meter CaCO3 composites well dispersed in the PP matrix in nano-meter scale, were easy to crystallize and had higher crystallization rate.
出处
《塑料工业》
CAS
CSCD
北大核心
2006年第9期48-50,54,共4页
China Plastics Industry
基金
国家自然基金重大项目资助(批准号:10590351)
