低收缩高抗冲聚丙烯复合物的制备  

Polypropylene Composites with Low Shrinkage and High Impact Strength

作　　者：康武丽 张鑫[1] 盖景刚[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2016年第3期128-133,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51473097;51003067);四川大学优秀青年学者科研基金资助项目(2012SCU04A03);高分子材料工程国家重点实验室开放课题基金资助(sklpme2014-3-14);中物院-川大协同创新联合基金(XTCX2014002)

摘　　要：等规聚丙烯(iPP)的收缩率高和缺口冲击强度低的缺点严重限制了其应用范围。文中研究了短玻璃纤维(GF)、聚丙烯接枝马来酸酐(MPP)及复合增韧剂(CTAs)对iPP的微观结构、收缩率和冲击强度等性能的影响。结果表明,当体系中加入30 phr GF时,样条在室温下放置24 h和48 h后的收缩率分别降低为0.168%和0.191%,仅仅为纯iPP的收缩率(1.821%)的9.2%和10.5%。在体系PP/GF/MPP/CTAs(质量比为55/30/5/10)中,拉伸强度提高至61.37 MPa,比纯iPP提高了81.2%;拉伸模量提高至1545 MPa,比纯iPP提高了118%;冲击强度提高至20.11 k J/m2,比纯PP提高了225%。The high shrinkage and the low impact strength severely limit the applications of the isotactic polypropylene （iPP）. In this paper, the microstrueture, shrinkage rate, tensile strength and other properties of composites, which were composed of iPP, short glass fiber （GF）, maleie anhydride grafted polypropylene （MPP） or composite toughening agents （CTAs） were studied. The results show that the shrinkage of the composite with 30 portions GF added reduces to 0. 168% and 0. 191% respectively after 24 h and 48 h at room temperature, which is far lower than the shrinkage of iPP. In system of the PP/GF/MPP/CTAs （mass ratio is 55/30/5/10）, the tensile strength ihcreases to 61.37 MPa, which is 81.2% higher than that of pure iPP; the tensile modulus is 1545 MPa, which is 118% higher than that of iPP; the impact strength is 20.11 kJ/m2, which is 225% higher than that of iPP.

关 键 词：等规聚丙烯 收缩率 微观结构 增韧剂 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]