臺灣博碩士論文加值系統

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.