聚合物共混物脆韧转变性能研究 Ⅱ准韧性聚合物共混物脆韧转变的几何模型  

STUDY OF THE BRITTLE DUCTILE TRANSITION OF POLYMER BLENDS Ⅱ.A GEOMETRIC MODEL

作　　者：刘浙辉[1] 朱晓光[1] 张学东[1] 漆宗能[1] 蔡忠龙[2] 王佛松[3] 

机构地区：[1]中国科学院化学研究所 [2]香港理工大学应用物理系 [3]中国科学院

出　　处：《高分子学报》1998年第1期1-7,共7页Acta Polymerica Sinica

基　　金：国家自然科学基金

摘　　要：给出了分散相粒间基体层厚度Ｔ与分散相粒径（ｄ）、粒径分散度（σ）和分散相体积分数（）的定量关系式．发现σ对Ｔ的影响与有关，不仅Ｔ随σ的增大而增大，而且越大，这种影响越显著．用计算机图像分析仪直接测定了聚氯乙烯／丁腈橡胶、聚丙烯（ＰＰ）／三元乙丙橡胶、ＰＰ／乙烯醋酸乙烯酯共聚物共混物的Ｔ，发现这三种共混物的Ｔ近似于对数正态分布．理论预示与实验结果很好符合．A new equation for correlating morphological parameters,particle size ( d ),particle size distribution ( σ ),particle volume fraction (  ) and matrix ligament thickness ( T ) is derived.The equation is generally applicable to binary polymer blends with the lg normal distribution of particle size and the morphology of well dispersed particles.The effect of σ on T is discussed.The new equation predicts that T increases with d and σ ,and with reducing  .The effect of σ is found to be influenced by  .The higher the  ,the more significant the effect of σ on T .The new equation is applied to the poly(vinyl chloride)/nitrile rubber,polypropylene (PP)/EPDM,and PP/EVA blends.The theoretical predictions agree well with the experimental results.

关 键 词：聚合物共混物 基体层厚度 共混物 脆韧转变 

分 类 号：O631.21[理学—高分子化学]