聚丙烯/凹凸棒土纳米复合材料的非等温结晶动力学  

Nonisothermal Crystallization Kinetics of Polypropylene/Attapulgite Nanocomposites

作　　者：王平华[1] 徐国永[1] 

机构地区：[1]合肥工业大学化工学院高分子科学与工程系,合肥230009

出　　处：《应用化学》2004年第8期783-787,共5页Chinese Journal of Applied Chemistry

基　　金：安徽省自然科学基金资助项目 ( 0 3 0 44 80 2 )

摘　　要：　用熔融复合法制备聚丙烯 /凹凸棒土纳米复合材料 ,用DSC法研究其非等温结晶行为 ,对所得的数据分别用Jeziorny法、Ozawa法和Liu法进行处理。结果表明 ,Jeziorny法和Liu法处理非等温结晶过程比较理想。聚丙烯及聚丙烯 /凹凸棒土纳米复合材料的结晶活化能分别为 194 1和 16 2 8kJ/mol,表明凹凸棒土的加入 ,降低了聚丙烯的结晶活化能 ,且t1/2 缩短 ,起到了异相成核作用。Polypropylene/attapulgite(PP/AT) nanocomposites were prepared by melt-compounding. The nonisothermal crystallization kinetics of polypropylene(PP) and PP/AT nanocomposites were investigated by differential scanning calorimetry(DSC). The Jeziorny, Ozawa and Liu methods were employed to analyze the DSC data. The results show that both Jeziorny method and Liu method could describe this system very well. The activation energies of the nonisothermal crystallization of PP and PP/AT nanocomposite evaluated by Arrhenius equation were 194.1 kJ/mol and 162.8 kJ/mol, respectively. Compounding with attapulgite decreases the activation energy of crystallization of PP. Attapulgite could be used as nucleating agent in nonisothermal crystallization process of PP.

关 键 词：聚丙烯 凹凸棒土 纳米复合材料 非等温结晶动力学 

分 类 号：O633.11[理学—高分子化学]