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首页> 外文期刊>Journal of Applied Polymer Science >Application of a linear synthetic polymer to improve the properties of cellulose fibers made by the NMMO process
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Application of a linear synthetic polymer to improve the properties of cellulose fibers made by the NMMO process

机译：线性合成聚合物在改善NMMO工艺制得的纤维素纤维性能方面的应用

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摘要

Low-molecular polyethylene (LMPE) as an internal flexibilizer was selected to improve the spinnability of cellulose solution in N-methylmorpholine-N-oxide (NMMO). It is compatible with the conditions of cellulose dissolution and fiber spinning because of its chemical stability and melting point. In the course of rheological investigations, it was proven that this modification has a physical characteristic. Cross sections of the fibers reveal that cellulose-LMPE forms a two-phase system with randomly distributed LMPE domains and a dominant skin-core structure. The addition of 5% LMPE is enough to improve significantly the mechanical properties of the fibers. An increase of LMPE above 5% worsens these properties, because LMPE is not a fiber-forming polymer. With the use of spinnerets with suitable dimensions, it is possible to obtain cellulose fibers with mechanical properties similar to those of synthetic fibers. The retention of water is lowered by the hydrophobic polyethylene polymer; however, it is high enough to retain the hydrophilic character of cellulose fibers. (C) 2002 John Wiley Sons, Inc. [References: 24]
机译：选择低分子聚乙烯（LMPE）作为内部增韧剂可改善纤维素溶液在N-甲基吗啉-N-氧化物（NMMO）中的可纺性。由于其化学稳定性和熔点，它与纤维素溶解和纤维纺丝的条件相容。在流变学研究过程中，已证明这种改性具有物理特性。纤维的横截面表明，纤维素-LMPE形成一个两相系统，该系统具有随机分布的LMPE结构域和主要的皮芯结构。添加5％LMPE足以显着改善纤维的机械性能。 LMPE的增加超过5％会使这些性能恶化，因为LMPE不是形成纤维的聚合物。通过使用具有合适尺寸的喷丝头，可以获得具有类似于合成纤维的机械性能的纤维素纤维。疏水性聚乙烯聚合物降低了水的保留;然而，它足够高以保持纤维素纤维的亲水性。 （C）2002 John Wiley Sons，Inc. [参考：24]

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