SEVERAL NEW PHENOMENA IN THE FORMATION OF RING-BANDED SPHERULITES OF POLY(EPSILON-CAPROLACTONE) AND POLY(STYRENE-RANDOM-ACRYLONITRILE) BLENDS

Ring-banded spherulites in crystallization of poly(epsilon-caprolacton e) and poly (styrene-random-acrylonitrile) blends were observed with p olarizing optical microscopy and digital image analysis technique was applied directly to the image obtained by polarizing microscope, Sever al new interesting phenomena were found. One is that the ring-banded s tructure 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 spherulite - lamellae twisting, Ano ther 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 (epsil on-caprolactone) and poly (styrene-random-acrylonitrile).