摘要
以新型的超支化聚磷酸酯(HPPE)对聚丙烯(PP)进行共混改性,研究了HPPE的用量和分子量对PP/HPPE复合材料性能的影响,还通过扫描电子显微镜(SEM)观察其试样冲击断面的微观形态并研究其增韧机理。结果表明,HPPE对PP/HPPE复合材料的冲击强度影响明显,当HPPE-1用量为3份时冲击强度可提高143.56%;熔体流动速率也有提高,但拉伸强度、弯曲强度和维卡软化点温度有微小下降,其增韧机理为两相"海-岛"结构增韧。
A kind of composite material was prepared by novel hyperbranched polyphosphate ester （HPPE） and PP. The effect of HPPE content and molecular weight （or generation） on performance of HPPE/PP composite was studied. SEM was used for observing micro - morphology of their impact fracture surface and studying toughening mechanism. The results showed that the impact strength and melt flow index of HPPE/PP systems increased remarkably for the addition of HPPE, and the maximum impact strength was 2.43 times that of pure PP while containing 3phr HPPE - 1 in HPPE - 1/PP composite material, but some performance, such as tensile strength, flexural strength, Vicat temperature of HPPE/PP systems decreased a little to some extent.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2009年第12期8-11,共4页
Engineering Plastics Application
基金
国家自然科学基金资助项目(50903094)
江苏省自然科学基金资助项目(BK2009585)
武汉市青年科技晨光计划(200850731406)
关键词
超支化聚磷酸酯
聚丙烯
改性
hyperbranched polyphosphate ester, PP, modification
