退火对PPR管材专用料结晶行为及抗低温性能的影响  

Effect of Annealing on Crystalline Structure and Low-temperature Toughness of Polypropylene Random Copolymer Dedicated Pipe Materials

作　　者：王潇梦 尹晓刚[1,2] 蒋团辉[2] 刘卫[1] 龚维[1,2] WANG Xiaomeng YIN Xiaogang JIANG Tuanhui LIU Wei GONG Wei(College of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025 National Engineering Research Center for Compounding and Modification of Polymeric Materials, Guiyang 550014)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵阳550014

出　　处：《材料导报》2017年第4期65-69,74,共6页Materials Reports

基　　金：国家自然科学基金(21264004);贵州省"百"层次人才项目(黔科合人才[2016]5673号);贵州省功能高分子材料科技创新人才团队建设项目(黔科合人才团队[2014]4006号);贵州省优秀青年科技人才项目(黔科合人字(2015)29号);贵州省科技特派员项目(黔科合农科特派[2015]4003-5号)

摘　　要：通过对无规共聚聚丙烯(PPR)管材专用料进行退火处理,采用SEM、DSC、XRD、POM等表征技术,分析了退火对PPR力学性能及结晶行为的影响规律。结果表明,在常温及低温(0~23℃)条件下,与未退火的PPR比较,退火工艺为120℃退火6h的材料冲击韧性最理想,其综合力学性能最好。在23℃时的冲击强度为51.61kJ/m^2,是未退火样品的1.9倍。0℃时的冲击强度也高达33.86kJ/m^2,是未退火样品的2.9倍。The effect of annealing on mechanical properties and crystallization behaviors of polypropylene random copolymer （PPR） dedicated pipe materials were analyzed by SEM, differential scanning calorimetry （DSC）, XRD and polarized optical microscopy （POM）. The results showed that when compared with unannealed sample, PPR annealed at 120℃ for 6 h indicated desired impact toughness and the relative better comprehensive mechanical properties under room temperature and low temperature （0-23℃）. The impact strength at 23℃ was 51.61 kJ/m^2 which was 1.9 times than that of unannealed sample. And the impact strength at 0℃ was also up to 33.86 kJ/m^2 which was 2.9 times than that of unannealed PPR

关 键 词：无规共聚聚丙烯 退火 抗低温性能 结晶行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]