摘要
采用熔融挤出法分别制备了聚苯醚 (PPO)与苯乙烯 乙烯 丁二烯 苯乙烯嵌段共聚弹性体 (SEBS)及其与马来酸酐接枝共聚物 (SEBS g MA)的共混物。DSC法对共混物的相容性研究发现 ,PPO与SEBS有一个共同的Tg,两者共混可达到完全热力学相容 ;而PPO与SEBS g MA存在两个Tg,其中一个为PPO相的 ,另一个则远高于SEBS g MA相的Tg,表明PPO与SEBS g MA中的PS相达到部分相容。力学性能研究显示 ,对于PPO/SEBS共混物 ,由于分散相SEBS与被增韧基体热力学完全相容 ,无法通过两相界面作用有效地增韧SEBS ;而部分相容的PPO/SEBS g MA共混物显示了增韧剂与基体良好的两相相界面作用 ,其缺口冲击强度在SEBS g MA质量分数为2 0 %时达到 12 6 0J/m的超韧性。
The miscibility of poly(phenylene oxide) (PPO) blends with styrene ethylene-co-butadiene styrene block copolymer (SEBS) and a version grafted with maleic anhydride (SEBS-g-MA) was investigated using a differential scanning calorimeter (DSC). Thermograms of these blends demonstrated that PPO was miscible with SEBS, which showed a unique Tg. But PRO was partially compatible with SEBS-g-MA because there were two of Tg in DSC curve, where one was close to Tg of PPO and the other was much higher than that of SEBS-g-MA. Mechanical property research revealed that PPO/SEBS blends achieved little higher notched Izod impact strength than pure PPO in all of composition. However SEBS-g-MA could effectively toughen PPO and the blends reached super toughness with a notched Izod impact strength of 1 260 J/m at the SEBS-g-MA content of 20% by weight.
出处
《北京化工大学学报（自然科学版）》
EI
CAS
CSCD
2001年第1期33-36,共4页
Journal of Beijing University of Chemical Technology(Natural Science Edition)
基金
国家"8 6 3"高新技术项目! (715 0 0 7 0 0 6 0 )
