LGFPP/IFR复合材料热氧老化性能研究  

Study on Thermal-oxidative Aging Properties of LGFPP/IFR Composite Material

作　　者：慈书亭 何敏[1] 张景中[1] 张道海[2] 吴斌[2] 郭建兵[2] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料科技》2014年第8期53-56,共4页Plastics Science and Technology

基　　金：贵州省科技计划(黔科合GY字[2013]3026);国家科技支撑计划项目(2013BAF07B00)

摘　　要：用熔融共混法制备了长玻纤增强聚丙烯/膨胀阻燃剂(LGFPP/IFR)复合材料,采用热烘箱老化法研究了140℃下老化时间对复合材料热氧老化性能的影响。结果表明:随着老化时间的延长,复合材料的力学性能显著下降,说明其分子量降低,发生了明显的热氧化降解。SEM测试结果表明:LGFPP/IFR复合材料表面出现了明显的网状裂纹,局部还出现了较大的裂纹。PP基体分子链的断裂以及长玻纤与PP基体间发生界面脱黏是导致LGFPP/IFR复合材料宏观力学性能下降的主要原因。The composite based on long glass fiber reinforced polypropylene（LGFPP） and intumescent flame retardant（IFR） were prepared by melt blending. The thermal-oxidative aging properties of the composite with different thermal exposure time at 140℃ were studied by means of oven heating. The results show that, the mechanical properties decreases significantly with the lengthening of aging time, which indicates the molecular weight of PP matrix decreases and significant thermaloxidative degradation is apparent. The SEM results show that： the pattern cracks appear obviously on the surface of LGFPP/IFR composites and part of cracks is larger. The results indicate that the fracture of the molecular chain of PP matrix and interface debonding between LGF and PP matrix is the main reason for the decline in the micro-mechanical properties of LGFPP/IFR composites.

关 键 词：长玻纤 聚丙烯 复合材料 膨胀阻燃剂 热氧老化 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]