EPDM交联对聚酰胺6基复合材料“沙袋结构”演变与性能的影响  

Effect of Crosslinking of EPDM on "Sandbag" Microstructure Evolution and Properties of PA6/EPDM/Nano-CaCO_3 Ternary Composites

作　　者：傅李丹[1] 陈思[1] 王勇杰[1] 孟季凤[1] 王旭[1] 

机构地区：[1]浙江工业大学化学工程与材料学院,浙江杭州310014

出　　处：《中国塑料》2010年第6期19-23,共5页China Plastics

基　　金：国家自然科学基金资助项目(50573067)

摘　　要：通过熔融法分别制备了三元乙丙橡胶(EPDM)/纳米碳酸钙(nano-CaCO3)交联母料及其与聚酰胺6(PA6)共混的三元复合材料。利用场发射扫描电子显微镜研究了EPDM交联对PA6/EPDM/nano-CaCO3三元复合材料形态的影响。结果表明,随着过氧化二异丙苯含量从0.30%(质量分数,下同)降低到0时,PA6/EPDM/nano-CaCO3三元复合材料中"沙袋结构"粒子粒径变小;冲击强度从22 kJ/m2提高到47 kJ/m2;拉伸强度和弯曲强度变化不明显。在受到外力作用时,含有均匀分散的"沙袋结构"粒子的三元复合材料通过"沙袋结构"粒子诱发微纤化和"扩张带"耗散外界作用能。Crosslinked Ethylene-propylene-diene terpolymer（EPDM）/nano calcium carbonate（EPDM/nano-CaCO3） masterbatch was prepared via melt blending,which was mixed with ployamide6（PA6）forming a ternary composite in a ＂sandbag＂structure with particles of crosslinked EPDM/nano-CaCO3 masterbatch dispersed in PA6 matrix. The effect of crosslinking of EPDM on morphology of the ternary composites was investigated using a field emission scanning electron microscope （FE-SEM）. It showed that when the content of dicumyl peroxide（DCP） in EPDM dereased from 0.30 % to 0, the size of the dispersed particles decreased, the impact strength of the ternary composites increased from 22 kJ/m2 to 47 kJ/m2; the tensile and flexural strength were little affected. When the ternary composite was impacted, the impact energy was dissipated by the mechanisms of fiber-forming mode and dilataional bands which were induced by ＂sandbag＂ microstructure.

关 键 词：聚酰胺6 三元乙丙橡胶 纳米碳酸钙 交联 沙袋结构 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]