【摘要】 采用融熔插层法制备了聚丙烯/马来酸酐接枝聚丙烯/有机蒙脱土纳米复合材料,用示差扫描量热法(DSC)研究了PP和复合材料的非等温结晶动力学.结果表明:PP和PP/PP-g-MAH/OMMT纳米复合材料的动力学速率常数Zc随冷却速率的提高而增加,而半结晶周期t1/2缩短;在相同降温速率下,PP/PP-g-MAH/OMMT纳米复合材料的t1/2比PP的小,纳米复合材料的Avrami指数n也小于PP的,说明蒙脱土起到异相成核剂的作用;OMMT的加入增加了PP的结晶活化能.更多还原

【Abstract】 The melt-intercalation method was employed to prepare polypropylene/maleic-grafted polypropylen/montmorillonite nanocomposites.The nonisothermal crystallization of PP and composites was described by DSC.The result indicates that the constant（Z_c） of crystallization rate were highed with rising of cooling rate,half period of crystallizations t_1/2 were lowered.At the same cooling rate the t_1/2 of PP/PP-g-MAH/OMMT was smaller than that of PP.The index（n） ≈3 for nanocomposites,which indicates the montmorillonite was functioned as a kind of heterogeneous nucleation centers.The addition of OMMT to PP increased the activation energies.更多还原