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題名 | 改質型聚氨基甲酸酯彈性纖維之濕式紡絲研究=A Study of the Wet Spinning of Modified Polyurethane Elastic Fiber |
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作者姓名(中文) | 林明芳; 曾雯卿; 許耀基; | 書刊名 | 技術學刊 |
卷期 | 12:1 1997.03[民86.03] |
頁次 | 頁131-145 |
分類號 | 478.1 |
關鍵詞 | 改質型PU-pmIA共聚合體; 濕式紡絲; 聚氨基甲酸酯彈性纖維; 初紡纖維; 紡絲液; Modified PU-pmIA copolymer; Wet-spinning; Polyurethane elastic fiber; As spun; Doping solution; |
語文 | 中文(Chinese) |
中文摘要 | 本研究合成三種不同分子量之二胺型全剛性( wholly-rigid )芳香族聚醯胺( aramid ); 聚(間一次苯間醯胺) Poly ( m-phenylene isophthalamide )( PmIA ) (杜邦公司商品名為 Nomex ), 用以改質傳統醚型 PU 聚合體。 利用二種不同分子量( 1000,2000 )之聚醚雙醇( PTMG )與 4, 4 '- 二苯甲基二異氰酸鹽( MDI ),先預聚 合成 PU 預聚合體, 再與三種不同分量二胺型 PmIA ( 346, 584, 823 )製備六種改值型 PU- PmIA 共聚合體,利用濕式紡絲法抽製成改質型彈性纖維。 一般來說,各國生產之聚氨 基甲酸酯彈性纖維,係多根單絲纖維粘合而成,此因初紡出之纖維( asspun )具有極大之 粘著性之故,也因此紡出之纖維容易互相粘著在一起:為解決此一問題,本實驗設計紡絲流 程,來改善絲間互相粘著的缺點,由實驗中得知,互相粘著的情形隨凝固浴溫度上升而減低 ,但卻使纖維表面產生更多皺摺,故再使用多道式紡絲系統,對紡絲過程中之凝固浴溫度、 成份及紡速加以探討,以得到最佳紡絲條件及紡絲液( doping solution )。 由實驗結果 顯示,使用多道凝固絲系統,在凝固浴溫度為 30 ° C,凝固浴成份為 30wt% DMAc 水溶液 ,水洗槽溫度為 50 ° C、70 ° C, 所紡製之纖維,不但具有良好的物性, 亦可得到較光 滑之表面,而纖維的強度隨著紡絲速度加快而增加,但伸度及彈性回復率則呈下降。 |
英文摘要 | In this study, conventional polyurethane(PU) was modified by the low molecular weight diamine-terminated wholly-rigid aromatic polyamide poly(m-phenylene isophthalamide)(pmIA)(Nomex).Two molecular weights (1000 and 2000) of poly (tetramethylene glycol)(PTGM) with 4, 4'-diphenylene methane diisocyanate(MDI) and with three different ratios of low molecular weight(346,584,823)were synthesized to form six modified PU-PmIA copolymer and then the modified PU-PmIA copolymers were spun using wet-spinning for the manufacturing of modified spandex fiber. In a gernral way, the multifilaments of polyurethane elastic fibers are glued together due to their self-adhesion during spinning. In order to avoid this, the wet spinning process was carefully conducted under varying spinning conditions:the temperature of the coagulation bath, composition of the coagulation bath, and spinning velocity. The self-adhesion was found to be reduced with the increas in the coagulation bath temperature. However, experimental results showed that the physical properties of the fiber were decreased due to formation of more corrugation as it was spun. Therefore, this situation could be modified by using a multi-step coagulation water-wash temperature (i.e., 30 ° C, 50 ° C, 70 ° C ). Besides, as the fiber was spun through the coaglation bath with a 30% DMAc water solution, the physical properties were even improved and more smooth-faced. With the acceleration of the spinning velocity, the strength of the fiber was found to be increased, but the elongation and the elastic recovery were decreased. |
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