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首页> 外文期刊>Journal of Applied Polymer Science >Investigation on dry spinning process of ultrahigh molecular weight polyethylene/decalin solution
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Investigation on dry spinning process of ultrahigh molecular weight polyethylene/decalin solution

机译：超高分子量聚乙烯/萘烷溶液的干法纺丝工艺研究

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摘要

The relationship between the draw-down ratio in the dry spinning process of ultrahigh molecular weight polyethylene/decalin solution and the fiber performance through maximized after-drawing was investigated. The structural development during the after-drawing process was analyzed by scanning electron microscopy, differential scanning calorimetry, wide-angle X-ray diffraction, sonic velocity, and FTIR measurements. An optimum drawdown ratio was found in the multihole dry spinning process, which may be explained by molecular disentanglement and the composite effect of entropy and the viscosity component. The as-spun fiber by draw-down had an obvious shish kebab morphology, lower crystallinity, and a higher melting temperature compared with a free extrusion sample, and higher crystallinity and melting temperature compared with the fiber by first-stage after-drawing. During the subsequent after-drawing process, the crystallinity, melting temperature, X-ray diffraction, and sonic velocity orientation factors increased slowly in the higher after-drawing ratio region, which was not consistent with the rising tendency of the tensile properties. The polarized and unpolarized IR spectra reflected the variations of the orientation and the content of the folded chains. (c) 2005 Wiley Periodicals, Inc.
机译：研究了超高分子量聚乙烯/十氢化萘溶液干法纺丝过程中的拉伸比与最大拉伸后纤维性能之间的关系。通过扫描电子显微镜，差示扫描量热法，广角X射线衍射，声速和FTIR测量分析了后拉伸过程中的结构发展。在多孔干法纺丝过程中发现了最佳的缩水比，这可以用分子解缠结以及熵和粘度成分的复合效应来解释。与自由挤出样品相比，牵伸纺成的纤维具有明显的烤肉串形态，较低的结晶度和较高的熔融温度，并且与第一阶段后牵伸的纤维相比具有较高的结晶度和熔融温度。在随后的后拉伸过程中，结晶度，熔融温度，X射线衍射和声速取向因子在较高的后拉伸比区域缓慢增加，这与拉伸性能的上升趋势不一致。偏振和非偏振红外光谱反映了折叠链的方向和含量的变化。 （c）2005年Wiley Periodicals，Inc.

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