：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。

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.