聚苯醚与SEBS及SEBS-g-MA共混物的相容性和力学性能  

Miscibility and mechanical properties of blends of poly(phenylene oxide) with SEBS and maleated SEBS

作　　者：汪晓东[1] 张强[1] 冯威[1] 金日光[1] 

机构地区：[1]北京化工大学材料科学与工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》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 )

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.

关 键 词：聚苯醚 苯乙烯-乙烯-丁二烯-苯乙烯接枝马来酸酐共聚物 共混物 相容性 韧性 力学性能 共混改性 

分 类 号：TQ326.53[化学工程—合成树脂塑料工业] TQ316.6