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題 名 | 聚氨基甲酸酯與聚(間一次苯基間苯醯胺)聚摻合體及嵌狀共聚合體其物性之研究 |
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作 者 | 林明芳; 許耀基; | 書刊名 | 技術學刊 |
卷 期 | 8:3 1993.09[民82.09] |
頁 次 | 頁355-366 |
分類號 | 467.42 |
關鍵詞 | 甲酸酯; 物性; 嵌狀共聚合體; 聚氨基; 聚間一次苯基間苯醯胺; 聚摻合體; |
語 文 | 中文(Chinese) |
中文摘要 | 本文係採用三種聚氯基甲酸酯彈性體與各種不同比率的高分子量聚 (間一次苯基間苯醯胺) ,藉物理摻合法製備八種PU/Nomex聚摻合體來改質傳統PU物性。亦使用低分子量二胺型Nomex預聚合體當做鏈延長劑來合成二種 PU-Nomex嵌友狀共聚合體。由熱分析與粘彈性質得知,聚摻合體與嵌狀共聚合 體均含有低於0℃之Tg (軟鏈節之Tg:Tgs) 和儲存係數E'值且高於傳統PU 。由X-ray繞射儀測試顯示嵌狀共聚合體和傳統PU的應變誘導結晶順向效應與PU及Nomex預聚合體的軟鏈節和硬鏈節組成與拉伸程度有關。由SEM圖得知較小的Nomex成份,在聚接合體與嵌狀共聚合體均為分散相。嵌狀共聚合體的抗張強度及斷裂伸度發現均優於聚摻合體。 |
英文摘要 | Two convnentional polyurethane (PU) elastomers were blended physically with various ratios of high molecular weight poly (m-phenylene isophthalamide) (Nomex) to form eight PU/Nomex polyblends in order to modify their physical properties. Two PU-Nomex multiblock co polymers were also synthesized with a low molecular weight diamineterminated Nomex prepolymer as a hydrogen donor for chain extending. DSC and dynamical properties showed that both the polyblends and multiblock copolymers exhibited a glass transition temperature (Tgs) under 0℃ and had a higher storage modulus (E') than those of the conventional PU. X-ray diffraction of the conventional PU and the multiblock copolymers showed that the degree of strain-induced crystallization is dependent on the PU and Nomex prepolymer segmental composition of the soft and hard segments and also the degree of its stretching. SEM micrograph revealed that the minor component of Nomex is in a dispersed phase in both the polyblends and multiblock copolymers. Both tensile strength and elongation of the multiblock copolymers were found better than those of the polyblends . |
本系統中英文摘要資訊取自各篇刊載內容。