PA6/EPDM-g-MAH/HDPE三元共混物的形态与性能  

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

作　　者：李澜鹏[1,2] 白富栋[1] 尹波[2] 

机构地区：[1]中国石油化工股份有限公司抚顺石油化工研究院,辽宁省抚顺市113001 [2]四川大学高分子科学与工程学院,四川省成都市610065

出　　处：《合成树脂及塑料》2015年第1期10-14,共5页China Synthetic Resin and Plastics

摘　　要：分别采用一步法和两步法制备了聚酰胺(PA)6/马来酸酐接枝三元乙丙橡胶(EPDM-g-MAH)/高密度聚乙烯(HDPE)三元共混物,研究了不同加工方法对三元共混物形态和力学性能的影响。结果表明:与一步法相比,采用两步法所制PA 6/EPDM-g-MAH/HDPE三元共混物形成了更加完善的壳-核包覆形态;用一步法所制共混物的悬臂梁缺口冲击强度为24.50 k J/m2,约为用两步法所制共混物的1/3;具有壳-核包覆形态的分散相粒子在受到应力时发生纤维化,纤维的形成能够吸收大量的断裂能以及阻止裂纹的扩展,从而提高共混物的韧性。Polyamide（PA）6/maleic anhydride grafted ethylene-propylene-diene monomer（EPDM-g-MAH）/high density polyethylene（HDPE） ternary blends were prepared via one- and tow-step methods, respectively. The effects of different processing methods on morphology and mechanical properties of the ternary blends were studied. The results indicate that the shell-core coating morphology formed in the PA 6/EPDM-g-MAH/HDPE ternary blend prepared by two-step method is more perfect than that prepared by one-step method. The Izod notched impact strength of the blend prepared by one-step method is 24.50 kJ/m2,which is about one-third of that prepared by two-step method. The fibrillation of dispersion phase particles with shell-core coating morphology in PA 6/EPDM-g-MAH/HDPE ternary blend can absorb plenty of fracture impact energy and pre-vent micro-crack further propagating,thus the impact toughness of the ternary blend is increased.

关 键 词：聚酰胺 高密度聚乙烯 三元共混物 壳-核形态 冲击韧性 

分 类 号：O633.22[理学—高分子化学] TQ325.12[理学—化学]