聚酰胺6微纤增强聚丙烯复合材料制备及化学注塑发泡性能研究  

Preparation of polyamide 6 microfiber reinforced polypropylene composite and its property of chemical foam injection molding

作　　者：杨莲 蒋晶[1,2] 贾彩宜 谢悦涵 王小峰 李倩 YANG Lian;JIANG Jing;JIA Caiyi;XIE Yuehan;WANG Xiaofeng;LI Qian(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;National Center for International Joint research of Micro‐Nano Molding Technology,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]微纳成型技术国家级国际联合研究中心,郑州450001

出　　处：《中国塑料》2024年第6期12-18,共7页China Plastics

基　　金：国家自然科学基金联合重点项目(U1909219)。

摘　　要：将原位成纤(INF)和化学注塑发泡(CFIM)技术结合,研究了相容剂对聚丙烯/聚酰胺6(PP/PA6)复合材料微纤形貌、黏弹性、力学性能和CFIM行为的影响。结果表明,PP-g-MAH相容剂的加入显著减小了PA6分散相尺寸,得到平均直径约265 nm的PA6微纤均匀分布于PP基体中,微纤网络结构的存在和相界面的协同增强效应显著提高了INF复合材料力学强度,拉伸强度相比纯PP提升26.2%,冲击强度相比纯PP提升62%;基于自制的吸‐放热平衡化学发泡剂的CFIM实验,制备出泡孔尺寸62μm、泡孔密度近5×10^(5)个/cm^(3)的INF复合泡沫制品,实现了12%样品减重的同时,相比纯PP泡沫,比拉伸强度提高了17%,比冲击强度提高了46%。T he effect of compatibilizer on the nanofibril morphology,viscoelasticity,mechanical properties,and CFIM behavior of polypropylene(PP)/nylon6(PA6)composite through a combination of in-situ fibrillation(INF)and chemical foam injection molding(CFIM)technologies.The results indicated that the addition of PP-g-MAH compatibilizer reduced the size of PA6 dispersion phase significantly,and PA6 microfibers were uniformly distributed in the PP matrix with an average diameter of about 265nm.The existence of a microfiber network structure and the synergistic enhancement effect of phase interface improved the mechanical strength of INF composites significantly.The tensile strength and impact strength of the composites are 26.2% and 62% higher than those of pure PP,respectively.Based on the CFIM experiment using the self-made endothermic-exothermic equilibrium chemical foaming agent,the INF composite foam product was prepared with a cell size of 62μm and a cell density of nearly 5×10^(5) cells/cm3.The as-prepared sample obtained a decrease in the weight by 12%.Compared to pure PP foam,the composite foam exhibited an increase in the specific tensile strength and impact strength by 17% and 46%,respectively.

关 键 词：聚丙烯 原位成纤 化学注塑发泡 泡孔结构 力学性能 

分 类 号：TQ325.5[化学工程—合成树脂塑料工业]