羧化聚苯醚和聚苯乙烯共混物的形态研究

STUDIES ON MORPHOLOGY OF CARBOXYLATED PPO AND POLYSTYRENE BLENDS

研究了同时具有最高临界互溶温度和最低临界互溶温度的羧化聚苯醚／聚苯乙烯共混体系随退火温度的变化而发生的相形态结构的变化．研究了此共混体系的相分离机理．并发现了此特殊共混体系低温和高温区的相分离机理是不同的．从分子的结构和分子间特殊相互作用上探讨了此共混体系产生特殊相行为的原因．

The phase behavior of blends of polystyrene (PS) and a random copolymercarboxylated poly (2, 6-dimethyl - 1, 4-phenylene oalde) (CPPO) with 8.0mol%carboxyl content was studied by DSC. It was found that the blends showed acoexistence of an UCST an a LCST behavior. TEM was used to study the phase morphology of blends' It was found that the phase morphology of blends at lowarmealing temperature is different from that at high annealing temperature. Themechanism of phase transformation was discussed. It was found that the mechanism of phase separation of blends in UCST area is different from that in LCST.