熔融共混PPS／PEEK中PPS组分的结晶行为

采用熔融共混法制备结晶／结晶共混体系ＰＰＳ／ＰＥＥＫ，并用差示扫描量热法研究了不同ＰＥＥＫ含量和不同ＰＥＥＫ粒径对ＰＰＳ／ＰＥＥＫ共混物中ＰＰＳ组分结晶行为的影响。随ＰＥＥＫ含量的增加ＰＰＳ的结晶温度提高，结晶峰宽增加。这是由于在降温过程中ＰＥＥＫ先结晶，可充当ＰＰＳ熔体结晶的异相晶核，使ＰＰＳ结晶温度提高，且随着ＰＥＥＫ含量增加，异相晶核密度增大，但ＰＥＥＫ晶区的存在阻碍了ＰＰＳ的结晶生长过程，

INFLUENCE OF PEEK ON CRYSTALLIZATION BEHAVIOR OF PPS COMPONENT IN PPS AND PEEK MELT-BLENDS

PPS/PEEK melt blend prepared by melt-blending is introduced,and the influence of a dif- ferent content of PEEK and a different size of PEEK particales on the crystallization behavior of PPS in the PPS/PEEK blend is investigated by DSC. With the content of PEEK increasing ,TC of PPS increases and width of crystallization peak becomes wider. This is the fact that in the course of temperature decreasing, PEEK crystallized first, its crystalline being as nucleus of PPS crystallizing, crystallization temperature of PPS is caused to increase,the density of nucleuses increase with the increasing of PEEK content,but PEEK crystallization section can impede the growth of PPS crystallization. While the size of PEEK particales decreases, crystallization behavior of both phases is influenced each other more,PPS Tc increase more,PEEK crystallizes in PPS melt,its temperature of crystallization also increases,crystallization peak changed from single peak to double peaks. TGA results show that the compability of both phases increase with the decreasing of PEEK particales.