聚己内酯和丙烯腈-苯乙烯无规共聚物的共混物生成环带球晶中的几个新现象

Several New Phenomena in the Formation of Ring banded Spherulites of Poly( ε caprolactone) and Poly(styrene random acrylonitrile) Blends

聚己内酯（ＰＣＬ）和丙烯腈－苯乙烯无规共聚物（ＳＡＮ）的共混物的相容性和形态曾被广泛研究［１～４］．ＰＣＬ的结晶形成球晶结构，其和ＳＡＮ共混，在熔体中结晶时不但可观察到Ｍａｌ－ｔｅｓｅ十字消光，而且存在非常明显的明暗交替的周期性环带状结构，称之为“环...

Ring banded spherulites in crystallization of poly( ε caprolactone) and poly(styrene random acrylonitrile) blends were observed with polarizing optical microscopy and digital image analysis technique was applied directly to the image obtained by polarizing microscope. Several new interesting phenomena were found. One is that the ring banded structure is still clearly seen after the analyzer was removed and this astonished phenomenon couldnt result from the general concept about formation mechanism of ring banded spherulitelamellae twisting. Another one is that there is a slight, dark line in the bright band when cross polars were added, which may be related to the formation process and mechanism of ring banded spherulites in the blends of poly( ε caprolactone) and poly(styrene random acrylonitrile).