摘要
本文研究了 PP,HDPE 和弹性体三元共混体系的形态、形变与组合的关系,重点分析了 PP/HDPE=1/1的复合基体对 PP 三元共混体系的增韧作用。采用10%弹性体与 PP/HDPE 复合基体共混,可获得具有较大冲击韧性的 PP 共混材料,其常温缺口冲击强度为66.6KJ/m^2,低温(-20℃)缺口冲击强度为9.6KJ/m^2。研究表明,PP/HDPE 复合基体的增韧作用有以下几方面:1.细化了 PP 球晶形态,PP 球晶以无规则碎块形态存在,弹性体同样起着相同的作用,2.改善了弹性体与 PP/HDPE 复合基体之间的界面粘结性能,3.改善了弹性体分散相在 PP/HDPE 复合基体內的分散状态,4.改变了基体的形变特性,与弹性体掺混后,发生银纹和剪切形变。
In this paper,the relationship of morphology,deformation,and constitu-ent for PP,HDPE and elastomer ternary polymer blend was studied.The tou-ghening effects of PP/HDPE(1/1)composite matrix on this blend system wasmainly analysed.It was shown that the blend with 10% elastomer have highimpact strength of 66.6 KJ/m^2 at room temperature and 9.6 KJ/m^2 at-20℃.It was found that the toughening effects of PP/HDPE composite matrix onthis system are:(1)to reduce the PP Spherulites and existing in randomfragmental form,and so does the elastomer;(2)to improve the interfacebonding properties between elastomer and composite matrix;(3)To mo-dify the distribution of elastomer dispersing phase in composite matrix;(4)To Change the deformation characteristic of composite matrix.Craze and sheardeformation occurred in composite matrix after blending with elastomer.
出处
《中国塑料》
CAS
CSCD
1990年第2期12-20,共9页
China Plastics
基金
中国自然科学基金会的资助
