i-PP-g-MAH对i-PP/CaSO_4复合材料的影响

Effects of interfacial modifier i-PP-g-MAH on morphology and mechanical performance of the polypropylene/CaSO_4 composites

用在 5 0 L固相接枝反应器中合成的马来酸酐接枝聚丙烯 ( i PP g MAH)作界面改性剂 ,制备了马来酸酐接枝聚丙烯 /聚丙烯 /硫酸钙晶须 ( i PP g MAH/i PP/Ca SO4 )复合材料 .研究了 i PP g MAH/i PP/Ca SO4 复合材料的形态结构和力学性能 .结果表明 :i PP g MAH对 i PP/Ca SO4 复合物的缺口抗冲强度、弯曲强度和拉伸强度均有增强作用 ;i PP g MAH对硫酸钙晶须填充的 i PP/Ca SO4 复合物表观粘度几乎没有影响 .SEM观察发现 i PP g MAH对硫酸钙晶须填充的 i PP/Ca SO4

Polypropylene/CaSO_4 composites(iPP/CaSO_4) were prepared by adding interfacial modifier isotactic polypropylenemaleic anhydride graft copolymer(iPPgMAH) utilizing the technique of solid phase graft copolymerization in 50 L reactor.Their morphology,rheological behaviour and mechanical performance were investigated.The results show that the impact strength,tensile strength and flexural strength were strengthened;the apparent viscosity of the composites was a little increased in the present of iPPgMAH. SEM shows that the interface of the iPP/CaSO_4 has improved obviously.