PP–R管材专用料抗低温性能的研究  

Study on Low-Temperature Crack Resistance of PP–R Pipe Dedicated Materials

作　　者：王潇梦 尹晓刚[1,3] 刘卫[1,2] 何颖[3] 龚维[1,2,3] 

机构地区：[1]贵州师范大学材料与建筑工程学院,贵阳550025 [2]贵州省无机非金属功能材料重点实验室,贵阳550025 [3]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《工程塑料应用》2015年第2期20-25,共6页Engineering Plastics Application

基　　金：国家自然科学基金项目(21264004);贵州省工业攻关项目(黔科合GZ字〔2013〕3019);贵州省功能高分子材料科技创新人才团队建设(黔科合人才团队[2014]4006号);贵州省无机非金属材料实验室建设(2012-004号)

摘　　要：通过在无规共聚聚丙烯（PP–R）中添加不同的改性剂制备PP–R管材专用料。采用差示扫描量热分析、动态力学分析、扫描电子显微镜等技术，分析了不同改性剂对无规共聚聚丙烯（PP–R）管材专用料抗低温性能的影响规律。结果表明，在–10～0℃低温条件下，与未改性的PP–R材料比较，PP–R／聚烯烃弹性体（POE）／高密度聚乙烯（PE–HD）共混料的低温冲击韧性最理想，其综合力学性能最好，0℃的冲击强度为58.35 kJ／m2，–10℃的冲击强度也高达47.06 kJ／m2。POE／PE–HD在不降低PP–R管材专用料其它力学性能的基础上，显著地提高了PP–R管材专用料低温冲击韧性。By adding different modifiers into polypropylene random copolymer（PP–R）,the pipe dedicated materials of PP–R were prepared. The influence rules of low-temperature crack resistance of different modifiers in PP–R were analyzed by means of differential scanning calorimetry,dynamic mechanical analysis,scanning electron microscope,and other testing technologies.The results show that comparing with unmodified PP–R materials,PP–R/POE/high density polyethylene（PE–HD） blend indicates desired impact toughness and the relative better comprehensive mechanical properties under low temperature about–10 to 0℃. The impact strength of 0℃is 58.35 kJ/m2 and the impact strength of–10℃is also up to 47.06 kJ/m2. Therefore,POE/PE–HD, significantly improve the performance of impact toughness at low temperature without reducing other mechanical properties of PP–R pipe dedicated materials.

关 键 词：无规共聚聚丙烯 抗低温性能 改性剂 专用料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]