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題 名 | Preparation and Physical Properties of Polyurethane Modified with Poly(4,4'-diphenylsulfone terephthalamide)=以聚(4,4'-二苯磺醯基對苯醯胺)改質聚氨基甲酸酯之製備及其物性之研究 |
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作 者 | 汪輝雄; 蕭凱仁; | 書刊名 | 逢甲學報 |
卷 期 | 26 1993.11[民82.11] |
頁 次 | 頁217-225 |
分類號 | 467.42 |
關鍵詞 | 改質; 物性; 苯醯胺; 聚4,4'-二苯磺醯基; 聚氨基甲酸酯; 製備; |
語 文 | 英文(English) |
中文摘要 | 三種傳統聚氨基甲酸酯彈性體與高分子量聚(4,4'-二苯磺醯基對苯醯胺) (PSA)做物理性聚摻合以獲得十二種聚摻合體以改善其物性,此外,三種新聚 氨基甲酸酯乃由低分子量PSA預聚合體當氫供給鏈延長劑而獲得。由動態黏 彈機械性,它顯示聚合體及新聚氨基甲酸酯皆較傳統PU顯現0℃以下之玻 璃轉位溫度(Tgs)及高的模體E',由X-光繞射測知,傳統與新聚氨基甲酸酯習 產生應力誘導結晶,它與其軟,硬鏈結及其延伸度有關。由形態學觀察,聚摻 合體及新聚氨基甲酸酯皆為二相構造,雖然新聚氨基甲酸酯有較佳之相容性。 除外,對強度而言,新聚氨基甲酸酯較聚摻合體及傳統者有較佳之抗張及伸度。 |
英文摘要 | Three conventional polyurethane (PU) elastomers were blended physically with various ratios of high molecular weight of poly (4, 4'-diphenylsulfone terephthalamide) (PSA) to form twelve PU/PSA polyblends in order to modify their physical properties. Also three new polyurethanes were synthesized with a low molecular weight PSA prepolymer as a hydrogen donor for chain extending. From dynamic properties, it showed that both the blends and the new polyurethanes exhibited a glass transition temperature (Tgs) below 0℃ and had a hihger modulus E' than those of the conventional PU. Based on the analysis of X-ray diffraction of the conventional and the new PU, it was shown that the degree of stress-induced crystallization was dependent on the segmental composition of the soft and hard segments and also the degree of its stretching. On the morphological observation, it was revealed that both the blends and the new polyurethanes all exhibited a two-phase structure although new polyurethanes had a better compatible state. For tensile properties it was found that both tensile strength and elongation of the new polyurethanes were better than those of the blends and conventional PU. |
本系統中英文摘要資訊取自各篇刊載內容。