PA 6/EPDM-g-MAH/HDPE三元共混物的形态与力学性能  

Morphology and mechanical properties of PA 6/ EPDM-g-MAH /HDPE ternary blends

作　　者：王伟[1] 窦睿[1] 尹波[1] 杨鸣波[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,四川省成都市610065

出　　处：《合成树脂及塑料》2013年第3期1-4,共4页China Synthetic Resin and Plastics

摘　　要：制备了聚酰胺(PA)6/马来酸酐(MAH)接枝三元乙丙橡胶(EPDM)(EPDM-g-MAH)/高密度聚乙烯(HDPE)三元共混物,采用扫描电子显微镜观察了三元共混物的相形态,研究了注塑过程的二次剪切流动对该三元共混物相形态的影响,以及三元共混物相形态对其力学性能的影响。结果表明:二次剪切流动有利于PA 6/EPDM-g-MAH/HDPE体系向热力学最稳定的壳核结构发生转变。与PA 6/EPDM-g-MAH二元共混物相比,该三元共混物的力学性能得到较大改善,w(EPDM-g-MAH)为15%时,其Izod缺口冲击强度达85.83 kJ/m2,是纯PA 6的9倍,是同等橡胶含量的PA 6/EPDM-g-MAH二元共混物的2倍。Polyamide （PA） 6/maleic anhydride （MAH） grafted ethylene-propylene-diene monomer rub- ber （EPDM）/high density polyethylene （HDPE） ternary blends were prepared. The influence of secondary shear on the morphology of PA 6/EPDM-g-MAH/HDPE ternary blends was studied by means of scanning electron microscope （SEM）. The results indicate that secondary shear attributes to form core-shell structure which is the steadiest thermodynamic structure. Compared with PA 6/EPDM-g-MAH binary blends, the mechanical proper- ties of the ternary blends were improved obviously. When the mass content of EPDM-g-MAH is 15%, the Izod notched impact strength of PA 6/EPDM-g-MAH/HDPE blends reaches 85.83 kJ/m： which is 9 times of pure PA 6 and 2 times of PA 6/EPDM-g-MAH binary blends under the same rubber content.

关 键 词：聚酰胺6 马来酸酐接枝三元乙丙橡胶 高密度聚乙烯 三元共混物 冲击强度 相形态 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]