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題名 | 改質型段式共聚醚酯-氨酯之研究=Investigation of Modified Block Copolyether-ester-urethanes |
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作 者 | 李大剛; 陳賢文; 蔡宏斌; | 書刊名 | 宜蘭技術學報 |
卷期 | 3 1999.12[民88.12] |
頁次 | 頁61-67 |
分類號 | 467.42 |
關鍵詞 | 段式共聚醚酯-氨酯; 熱塑性彈性體; 結構物性; 熱性質; Block copolyether-ester-urethanes; Liquid crystalline behavior; Thermoplastic elastomers; Thermal properties; Structureproperty relationships; |
語文 | 中文(Chinese) |
中文摘要 | 本研究將過量之1,5-戊二醇與二酸混合物[4,4'-聯苯二甲酸二甲酯(dimethy14,4'- bibenzoate;BB):對苯二甲酸二甲酯(dimethyl terephalate:PTA)=75:25及50:50]依設 定的入料比聚縮合法生成二種分子量約3,000但不同成份之聚(4,4'-聯苯二甲酸-共-對苯二 甲酸戊二酯)二醇[poly(pertamethylene 4,4'-bibenzoate-co-terephthalate)] glycol,同時利用 HNMR鑑定其組成。再以此二種不同成份之聚(4,4'-聯苯二甲酸-共-對苯二甲酸戊二酯)二 醇與MDI(甲撐二苯異氰酸酯)及分子量2000之聚醚二元醇PTMEG以溶液(DMF)聚合 生成硬段含量分別為15%,30%及45%之熱向性段共聚醚酯-氨酯。此系列段式共聚醚酯-氨 酯具聚(4,4'-聯苯二甲酸-共-對苯二甲酸戊二酯)之硬鏈節及聚四甲撐醚的軟鏈節,而可作 為熱塑性彈性體。改變聚(4,4'-聯苯二甲酸-共-對苯二甲酸戊二酯)二醇之成份及其硬段含 量(15%,30%及45%)將對段式共聚醚酯-氨酯之熱學性質、機械性質及液晶性質,均有 很大的影響。不同結構組成之段式共聚醚酯-氨酯以DSC(示差掃描熱卡計)測其熱學性 質、拉力機研究其機械性質及以偏光顯微鏡及X-射線繞分析其結晶性質,並依此建立段式 共聚醚酯-氨酯的結構-物性的關係。由實驗結果發現本系列共聚醚酯-氨酯成品具有良好 之機械性質,且其受組成影響甚鉅。由DSC,偏光顯微鏡及X-射線繞射分析其結晶性質 得知共聚酯寡聚合體之排列規則性及硬鏈節含量對聚醚酯-氨酯成品之結晶性質有決定性之 影響。 |
英文摘要 | Two poly(pertamethylene 4,4'-bibenzoate-co-terephthalate) glycols, molar mass about 3,000 with different composition are formed by melt polycondensation of 1,5-pertanediol and diacid mixtures [dimethy1-4, 4'-bibenzoate:dimethyl terephalate = 75;25 and 50;50] at fixed feed ratio. The poly(pertamethylene 4,4'-bibenzoate-co-terephthalate) glycols react with MDI and poly(tetramethylene either) glycol (PTMEG, Mn=2,000) in DMF to form a series of block copolyether-ester-urethanes with hard segment content of 15%, 30% and 45%, respecitively. The block copolyether-ester-urethanes are comprised of poly(pentamethylene 4, 4'-bibenzoate-co- terephthalate) glycol as the hard segment and poly(tetramethylene ether) as the soft segment which shows rubbery behavior. They can be used as the thermoplastic elastomers. The composition of the hard segment and the hard segment content have great influence on the thermal properties, mechanical properties and liquid crystalline behavior of these block copolyether-ester-urethanes. The effects of hard segment composition and hard segment content on the thermal transitions, mechanical properties and liquied crystalline behavior are characterized by DSC (differential scanning calorimetry), universal tensile test machine and wide-angle X-ray diffraction respectively From tensile results, the block copolyether-ester-urethane shows good mechanical properties, which affects by the hard segment composition and hard segment content, significantly. The liquid crystalline behavior are investigated by DSC, wide-angle X-ray diffraction and polarized microscopy. Only the copolyether-ester-urethanes with highter BB content in hard segment and higher hard segment content (BTO-45) display monotropic liquid crystalline behavior. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。