摘要
通过在以烷基羧酸盐为表面处理剂的PP/CaCO3 复合体系中添加改性聚烯烃和EPDM 的方法,研制了高冲击韧性PP/EPDM/CaCO3 复合材料。在该材料中,由于烷基羧酸盐可以和CaCO3 发生某种物理化学作用,被牢固地键接在CaCO3 表面上,且改性聚烯烃能与烷基羧酸盐的长链末端产生良好的分子间力作用,并对EPDM 橡胶弹性体中聚乙烯部分发生选择性相容,使EPDM 倾向于包覆在CaCO3 表面上,相当于增大了EPDM 的体积分数,使EPDM 的增韧效率在得以明显提高的同时,能更有效地改善CaCO3 与基体树脂之间的界面粘结状态并增加CaCO3 与基体树脂之间的力学作用层厚度,可使PP/EPDM/CaCO3 复合体系表现出较高的冲击韧性和较大的断裂伸长率,在物理性能行为上表现出类似于PP/EPDM 合金的性质,并在一般力学性能指标上均可达到汽车保险杠用材料的性能。
High impact toughness PP/EPDM/CaCO 3 composite is prepared by adding modified polyolefin and EPDM into PP/CaCO 3 composite which is coupled by alkyl carboxylic salt. Due to that alkyl carboxylic salt can interact with CaCO 3 physically or chemically, thus it can attach to the surface of CaCO 3. Furthermore, modified polyolefin can interact with the long chain end of alkyl carboxylic salt through molecular force and prefers to be compatible with PE in EPDM, thus making EPDM tends to pack on the surface of CaCO 3. This equalizes that EPDM's volume fraction has been increased, when toughening efficiency of EPDM is clearly improved, the interface adhesive state between CaCO 3 and matrix resin has been effectively developed and the dynamic interactive layer thickness between them has been improved. This can make PP/EPDM/CaCO 3 composite achieve relatively high impact toughness and elongation to break. Furthermore, the composite appears the similar physical property as PP/EPDM alloy. They can meet the property index in automobile bumper demand.
出处
《中国塑料》
CAS
CSCD
北大核心
1999年第10期26-31,共6页
China Plastics
关键词
聚丙烯
乙丙橡胶
碳酸钙
复合材料
韧性
PP,EPDM,CaCO 3,Composite, Impact toughness, Alkyl carboxylic salt
