【摘要】 以聚丙烯(PP)作为基体,长玻璃纤维(GF)作为增强材料,马来酸酐接枝聚丙烯(PP-g-MAH)作为相容剂,经双螺杆挤出造粒后压制为PP/GF复合材料,研究了PP-g-MAH含量对复合材料弯曲性能的影响,以及不同牌号PP对复合材料力学性能和耐热性能的影响。研究表明,PP-g-MAH能有效提高PP/GF复合材料的弯曲性能,但加入量超过10%后材料的弯曲性能变化不大。复合材料的弯曲性能和维卡软化温度随着PP熔体流动速率的增大而提高,冲击性能随熔体流动速率的增大而降低。其中牌号为SF35的PP制备的复合材料综合性能最佳,该复合材料满足塑料建筑模板的要求。更多还原

【Abstract】 In this paper,polypropylene( PP) / long glass fiber( GF) composites were prepared by twin-screw extrusion followed by compression molding,with PP as the matrix,GF as the reinforce and maleic anhydride grafted polypropylene( PP-g-MAH) as the compatibilizer. The effects of PP-g-MAH content on the flexural performance and the effects of PP grade on both mechanical and heat resistance properties were studied in detail. The results showed that flexural properties of PP / GF composite could be improved significantly when PP-g-MAH content was below 10 wt%. Moreover,with increasing melt index of PP matrix,The flexural properties and Vicat temperature of composite increased while the impact strength decreased. The composite with matrix PP SF35 had the best comprehensive performance and could be used in construction formwork.更多还原