热氧老化对长玻璃纤维增强PP材料动态流变性能影响  

Effect of Thermal-Oxidative Aging on Dynamic Rheological Properties of Long Glass Fiber Reinforced Polypropylene

作　　者：王蒙[1,2] 宋海硕 郭建兵[1,2] Wang Meng;Song Haishuo;Guo Jianbing(College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China;National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China)

机构地区：[1]贵州大学材料与冶金学院,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：《工程塑料应用》2017年第8期88-92,共5页Engineering Plastics Application

基　　金：国家自然科学基金项目(51003088);贵州省高层次创新型人才培养项目(黔科合人才[2015]4039号;[2016]5667号);贵州省优秀青年科技人才培养对象专项资金项目(黔科合人字[2015]26号);贵州省科技计划项目(黔科合重大专项字[2015]6005号;黔科合成果[2016]4524号)

摘　　要：通过熔融共混法制备长玻璃纤维增强聚丙烯(LGFPP)复合材料,采用旋转流变仪和扫描电子显微镜测试研究了不同热氧老化时间下复合材料的动态流变行为。结果表明,热氧老化过程PP发生降解,分子量降低,同时随老化程度的加深分子链的缠结以及分子间相互作用力逐渐被削弱,分子链松弛能力增加;树脂的降解过程容易在纤维与基体的界面区域进行,使得纤维与基体的界面性能下降,粘结力下降。因此,随老化时间的增加复合材料的储能模量、损耗模量、损耗因子以及复数黏度都呈现下降趋势。The long glass fiber reinforced polypropylene(LGFPP)composite was prepared by melt blending.The dynamic rheological behaviors of the composites with different aging time(0-50d)were investigated using SEM and rotational rheometer.The results show that PP resin is decomposed during the aging process and the molecular weight decreases,meanwhile,the entanglement of molecular chains and the interaction between molecules are weakened,and thus the relaxation of molecular chain increases,the degradation of PP resin at the interfacial area between fiber and matrix is easily to happen,resulting in the deterioration of interfacial properties.Finally,the storage modulus,loss modulus,tanδand complex viscosity of the composites show downward trend with aging time increasing.

关 键 词：长玻璃纤维 聚丙烯 热氧老化 动态流变性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]