PP／PP—g—MAH／HGB复合材料非等温结晶行为研究

摘要

采用熔融法制备了聚丙烯／马来酸酐接枝聚丙烯／空心玻璃微珠（PP／PP-g-MAH／HGB）复合材料，采用差示扫描量热仪研究了PP、PP／HGB、PP／PP-g-MAH／HGB复合材料的非等温结晶过程，并通过Jeziorny法和Mo法研究了3种材料的非等温结晶动力学。结果表明，随着降温速率的增大，3种材料的结晶峰温、结晶起始温度和结晶度均减小，结晶速率增大；HGB抑制了PP的结晶行为，降低了结晶速率；PP-g-MAH对PP结晶速率的影响较小，HGB和PP-g-MAH都会改变PP的结晶成核和生长机理。%Polypropylene/maleic anhydride grafted polypropylene/hollow glass bead （PP/PP-g-MAH/ HGB） composites were prepared via extrusion molding. The nonisothermal crystallization behavior of the composites was investigated using differential scanning calorimetry. The nonisothermal crystallization kinetics of the composites was analyzed by Jeziorny and Mo equation. It was found that crystallization temperature, initial crystallization temperature, and crystallinity of PP, PP/HGB, and PP/PP-g-MAH/ HGB were decreased, and the crystallization rate was increased with increasing cooling rate. The crystallization rate of PP was decreased by adding HGB. The mechanisms of nucleation and growth of crystallization were changed by mixing HGB and PP-g-MAH.