PP-MAH对PP/汉麻纤维复合材料结构及性能的影响  

Influence of PP-MAH on the Morphology and Properties of PP/Hemp Fiber Composites

作　　者：牛鹏飞[1] 陈建野[1] 卫晓明[1] 王孝军[2] 杨杰[2,3] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]四川大学材料科学与技术研究所,四川成都610064 [3]四川大学高分子材料工程国家重点实验室,四川成都610065

出　　处：《中国塑料》2010年第12期46-51,共6页China Plastics

摘　　要：研究了PP-MAH对注射成型PP/汉麻纤维(HFs)复合材料的皮-芯层形态结构及力学性能的影响。结果表明,未添加PP-MAH的复合材料体系中,HFs在注塑试样皮层和芯层沿流动方向高度取向。在试样皮层,HFs诱导PP产生β晶。试样皮层呈现韧性断裂行为,而芯层则发生脆性断裂;添加5份(质量份数,下同)PP-MAH后,HFs在注塑试样皮层高度取向,然而在试样芯层HFs呈现无规则分布。与未添加PP-MAH的体系相比,试样皮层中,HFs诱导PP产生β晶能力减弱,复合材料的冲击强度稍有降低,且皮层和芯层试样均呈脆性断裂行为。添加PP-MAH的复合体系拉伸强度和弯曲强度则呈明显提高趋势。This paper investigated the influence of PP-MAH on skin/core morphology and mechanical properties of injection molded polypropylene/hemp fiber composites. Without PP-MAH, highly oriented HFs along flowing direction was observed in both skin and core zone of the specimen. Moreover, the incorporation of HFs induced the formation of β-form crystal in skin zone. The skin zone showed ductile fracture while core zone brittle fracture. When 5 phr PPMAH was introduced, only in the skin zone was highly oriented HFs observed, in the core zone but random ones. The relative content of β-form crystals in the skin zone was reduced. Impact strength of the composite decreased slightly. Brittle fracture behavior in both skin and core zone of the composite was observed. Additionally, the tensile and flexural strengths were significantly improved with the presence of PP-MAH.

关 键 词：聚丙烯 汉麻纤维 皮一芯结构 力学性能 冲击韧性 

分 类 号：TB332[一般工业技术—材料科学与工程]