- 期刊
Metallocene同位聚丙烯（m-iPP）與Ziegler-Natta同位聚丙烯（zn-iPP）纖維物性之研究
Metallocene Isotactic PP (m-iPP) and Ziegler-Natta (zn-iPP) Fibers: Physical Properties
摘要
本研究使用凝膠滲透層析儀（GPC）、熱量差示掃描儀（DSC）、熱重量損失分析儀（TGA）、流變儀（rheometer）、動態熱應力儀（dynamic thermal stress machine）、偏光顯微鏡（polar light microscope）、高速紡絲試驗機（high speed spinning machine）、延伸捲取機（draw-winder machine），以及纖維強度測定儀（tenacity test machine）等實驗設備，探討metallocene同位聚丙烯（m-iPP）與Ziegler-Natta同位聚丙烯（zn-iPP）之纖維物性。由實驗結果發現，m-iPP比zn-iPP具有較高的熱裂解溫度（Td），同時也發現m-iPP的熔點（Tm）明顯比zn-iPP低約13℃左右，但二者之熔解熱焓量（△Hm）則為相近似。M-iPP因具有較窄之平均分子量分佈，以及較規整的分子排列，所以其纖維強度及纖維順向度皆優於zn-iPP，也由於m-iPP纖維分子排列較zn-iPP纖維分子排列整齊，使得m-iPP纖維在進行後段延伸加工時所產生的應力（stress）大於zn-iPP，且m-iPP延伸後之纖維強度值亦比zn-iPP大。
並列摘要
This study investigates the physical properties of metallocene isotactic polypropylene (m-iPP) and Ziegler-Natta isotactic polypropylene (zn-iPP) fibers. The testing methods adopted were differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and gel permeation chromatography (GPC). The equipments employed were a rheometer, a dynamic thermal stress machine, a polar light microscope, a high speed spinning machine, a draw-winder and a tenacity test machine. The experimental results indicate that the degradation temperature (Td) of m-iPP polymer was above that of zn-iPP polymer, and that the melting temperature (Tm) of m-iPP polymer, at about 13℃, was below that of zn-iPP polymer. The fusion heat (△Hm) of m-iPP polymer was similar to that of zn-iPP polymer. Experimental results also show that the molecular arrangement and narrow molecular weight distribution of m-iPP fiber were better than those of zn-iPP fiber. Consequently, the tenacity, crystallinity and orientation of m-iPP fiber were higher than those of zn-iPP fiber. The stress of m-iPP fiber was higher than that of zn-iPP fiber during the draw process, and the tenacity of m-iPP fiber was higher than that of zn-iPP fiber after the draw process.