聚對苯二甲酸丁酯/聚甲基丙烯酸甲酯相容化聚摻合物之研究

Abstract

本文研究針對PMMA/PBT部份相容摻合系統,加入反應性相容劑MMAG (Methyl methacrylate -co- glycidyl methacrylate random copolymer)及催化劑之後對摻合系統相容性,相形態,熱處理以及機械性質 方面所造成的影響.經由微差掃描卡計(DSC)分析結果顯示,PMMA/PBT摻合 系統之玻璃轉移溫度(Tg)為組成之函數,而且隨著PMMA含量的增加而遞減, 加入相容劑之後,Tg更向低溫偏移.而相形態在組成比為60/40時形成共連 續相結構,由於兩相黏度比的改變,使得相形態更趨於複雜.對於熱處理而 言,相容劑之加入對高溫時系統形態之穩定性有顯著的效果.而抗張伸長率 亦隨著相容劑以及催化劑的參與而增加.選擇不同型態之彈性體以及不同 之加工順序將可控制彈性體分佈於PMMA,PBT或兩相中;彈性體落於PBT相中 比落於PMMA相中擁有較佳的抗張性質. This paper reports the effect of MMAG in-situ compatibilizers in PMMA/PBT blends on miscibility,phase morphology,heat history and mechanical properties.DSC results showed the glassy transi- tion temperature (Tg) of PMMA/PBT blending system is a function of The phase morphology of PMMA/PBT=60/40 blend showed a co-con -tinuous phase structure. The addition of compatibilizer (MMAG) in the blend stabilized the phase morphology under annealing and improved slightly the resulted mechanical properties. By select- ing type of elastomer and processing sequence,elastomer particles distributed in PMMA,PBT or in both phases can be controlled. The elastomer residing in PBT phase results in better tensile proper- ties than in PMMA phase.