Hot-Drawing of Ultrahigh-Molecular-Weight Polyethylene Gel Films  

作　　者：戚嵘嵘 朱清仁 周持兴 刘萌戈 周贵恩 

机构地区：[1]School of Chemistry and Chemical Technology, Shanghai Jiaotong University, Shanghai 200240, P. R. China [2]Structure Research Laboratory, the University of Science and Technology of China, Hefei 230026, P. R. China

出　　处：《Journal of Shanghai University(English Edition)》2004年第1期101-108,共8页上海大学学报（英文版）

摘　　要：The three stages in the hot-drawing process of ultrahigh-molecular-weight polyethylene gel films can be detected by x-ray diffraction, infrared spectroscopy, birefringence and scanning electron microscopy. In the first stage of the drawing process, the lamellae in the gel films rotate and/or slip with the b-axis preferentially perpendicular to the drawing direction. With increased drawing, the c-axis of the lamellae become parallel to the stretching direction while unfolding of the chain begins, and the chains of the amorphous phase also orient along the drawing direction in the strain-chain domain. When the draw ratio is large enough, the lamellar structure is transformed into a fibrillar structure in a two-dimensional fashion.The three stages in the hot-drawing process of ultrahigh-molecular-weight polyethylene gel films can be detected by x-ray diffraction, infrared spectroscopy, birefringence and scanning electron microscopy. In the first stage of the drawing process, the lamellae in the gel films rotate and/or slip with the b-axis preferentially perpendicular to the drawing direction. With increased drawing, the c-axis of the lamellae become parallel to the stretching direction while unfolding of the chain begins, and the chains of the amorphous phase also orient along the drawing direction in the strain-chain domain. When the draw ratio is large enough, the lamellar structure is transformed into a fibrillar structure in a two-dimensional fashion.

关 键 词：ultrahigh-molecular weight polyethylenes (UHMWPE) gel film hot-drawing morphological changes. 

分 类 号：O631[理学—高分子化学]