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題名 | 聚氨基甲酸酯彈性纖維製作之研究=A Study on Manufacture of Polyurethane Elastic Fiber |
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作者 | 徐錦祥; | 書刊名 | 紡織中心期刊 |
卷期 | 8:2 1998.04[民87.04] |
頁次 | 頁131-140 |
分類號 | 467.6 |
關鍵詞 | 軟鏈結; 相分離; PU; Soft segment; Phase-separation; |
語文 | 中文(Chinese) |
中文摘要 | 本實驗共合成了四種型態之PU;由實驗結果知,C型PU無法脫膜,而B型PU則黏度較A型者為低。由機械性質之測試結果可知,各型PU之斷裂強度均隨硬鏈節含量增加而增加,斷裂伸度則隨硬鏈節含量增加而降低,且A型PU之斷裂強度較B型PU為高,而B型PU之斷裂伸度則比A型PU為高。由熱性質測試結果可知,各型PU於-69℃~-76℃間均有一明顯之軟鏈節玻璃轉位溫度(Tgs) ,軟鏈節之熔點則隨著硬鏈節含量之增加而向低溫移動。相分離現象則隨硬鏈節含量之增加而有愈嚴重的趨勢。由紡絲結果得知,以凝固浴濃度30wt%,紡絲固含量35wt%紡出之彈性纖維具有較佳之物性。 |
英文摘要 | In this experiment, we synthesized four types of PU polymers. From the results of experiments, we found that the type C PU could not be released from the mould, and also the type B PU showed a lower viscosity than that of type A. From the mechanical properties, the breaking strength were found to be increased with the increase of the amount of hard segment. On contrary, the breaking elongation was decreased with the increase of hard segment. All PU exhibited a transition temperature of soft segment(Tgs) at 69°C~-76°C.Also, the phase-separation was much enhanced with the addition of more hard segment. From the results of fiber spinning, we found that the best spinning conditions were the coagulating bath with 30 wt% DMF/water solution and solid content 30 wt% of dope. |
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