Abstract

The use of a solvent, Vaseline oil, for the orientational drawing of high-strength and high-modulus UHMWPE fibers is considered. Since the side effect of the residual solvent during orientational drawing of UHMWPE fibers is the formation of pores that reduce the packing density of macromolecules, then at a certain stage of drawing the fiber, the solvent is removed from it by washing in n-heptane. The task of monitoring the residual solvent is studied by wide-line ¹H NMR and ATR IR spectroscopy. In terms of methodology, the task is complicated by the accumulation of low molecular weight fragments of broken UHMWPE macromolecules, which are difficult to distinguish from short solvent molecules, in highly oriented fibers.

中文翻译：

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高取向超高分子量聚乙烯纤维中的残留溶剂

摘要

考虑使用溶剂凡士林油进行高强度和高模量的UHMWPE纤维的定向拉伸。由于在UHMWPE纤维定向拉伸过程中残留溶剂的副作用是会形成降低大分子堆积密度的孔，因此在拉伸纤维的某个阶段，可通过用正庚烷洗涤将溶剂除去。通过宽线¹ H NMR和ATR IR光谱研究了监测残留溶剂的任务。就方法论而言，由于断裂的UHMWPE大分子的低分子量片段在高度取向的纤维中积累而使任务变得复杂，而UHMWPE大分子的低分子量片段难以与短溶剂分子区分开。