https://scholars.lib.ntu.edu.tw/handle/123456789/64436
標題: | 運用共聚高分子強化高分子界面 | 作者: | 戴子安 | 公開日期: | 31-十月-2003 | 出版社: | 臺北市:國立臺灣大學化學工程學系暨研究所 | 摘要: | 在兩不互溶高分子材料,聚苯乙烯(polystyrene ,簡稱PS)及聚甲基丙酸甲酯 (poly-metyl methacrylate ,簡稱PMMA)間,加入苯乙烯與甲基丙酸甲酯聚合之無 規共聚物[poly(styrene-co-methyl methacrylate) random copolymer],以達到界面增 強的效果。所添加之無規共聚物(random copolymer)以苯乙烯含量來區分,共有 九種不同之組成,分別為f s=0.9 、0.82 、0.74 、0.64 、0.52 、0.39 、0.28 、0.18 、 0.09 。利用非對稱雙懸臂界面接著測量法(ADCB adhesion method)量測苯乙烯與 聚甲基丙酸甲酯之界面接著強度,可得知藉由等比例混摻不同組成之九種無規共 聚物(random copolymer)能夠有效的強化接著的強度,使界面破裂能量(Gc)達 140(j/m 2 ),相較於未加任何共聚物之裸界面之界面破裂能量(Gc)的4(j/m 2 )有相當 顯著之提升。在破壞面分析的部分,將非對稱雙懸臂界面接著測量法(ADCB adhesion method)破壞後的表面進行ATR-FTIR (Fourier Transform Infrared Microscopy)進行表面析,發現塊材厚度比之幾何效應將會影響破壞裂縫(crack) 行進的方向,使破壞位置改變,而顯現出不同的界面破裂能量(Gc)。 We have measured the fracture toughness of interface between polystyrene (PS)/poly methyl methacrylate (PMMA) using mixed composition of different random copolymers of PSf-r-PMMA1-f, where f is the volume fraction of PS in the random copolymer. Nine different composition of PS-PMMA were used with f ranging from 0.1 to 0.9. We have found the fracture toughness of interface can be significantly increased with mixed random copolymer compared with that from the copolymer of single composition. It is found that with increasing concentration of the mixed random copolymer at the interface, the Gc of the interface increase quickly and finally reaches a plateau. The failure mechanism is examined by ATR-FTIR technique. With thick random copolymers layer at the interface, we found that beside the homopolymer PS crazes, the thick random copolymer itself also crazes. This method suggests a simple method for one to effectively use random copolymers for reinforcement. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/9348 | 其他識別: | 912216E002015 | Rights: | 國立臺灣大學化學工程學系暨研究所 |
顯示於: | 化學工程學系 |
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