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首页> 外文期刊>Journal of Applied Polymer Science >Highly crystalline and oriented high-strength poly(ethylene terephthalate) fibers by using low molecular weight polymer
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Highly crystalline and oriented high-strength poly(ethylene terephthalate) fibers by using low molecular weight polymer

机译：使用低分子量聚合物的高结晶度和取向性高强度聚对苯二甲酸乙二醇酯纤维

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摘要

High-strength poly(ethylene terephthalate) (PET) fibers were obtained using low molecular weight (LMW) polymervia horizontal isothermal bath (hIB), followed by postdrawing process. We investigated the unique formations of different precursors, which differentiated in its molecular orientation and crystalline structures from traditional high-speed spinning PET fibers. Sharp increase in crystallinity was observed after drawing process even though the fibers showed almost no any crystallinity before the drawing. Properties of as-spun and drawn hIB and control filaments at different process conditions were compared. As would be expected, performances of resulted treated undrawn and drawn fibers have dramatically improved with developing unique morphologies. Tenacities more than 8 g/d for as-spun and 10 g/d for drawn treated fibers after just drawn at 1.279 draw ratio were observed. These performances are considerably higher than that of control fibers. An explanation of structural development of high-strength fibers using LMW polymer spun with hIB is proposed. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42747.
机译：使用低分子量（LMW）聚合物通过水平等温浴（hIB）获得高强度聚对苯二甲酸乙二酯（PET）纤维，然后进行后拉伸过程。我们研究了不同前体的独特形成，这些前体的分子取向和晶体结构与传统的高速纺丝PET纤维不同。即使在拉伸前纤维几乎没有显示出结晶度，在拉伸过程后仍观察到结晶度的急剧增加。比较了在不同工艺条件下纺制和拉伸的hIB和对照丝的性能。如所预期的，随着形成独特的形态，处理后的未拉伸和拉伸纤维的性能已得到显着改善。在刚以1.279的拉伸比拉伸后，观察到刚纺时的强度大于8 g / d，拉伸后的处理纤维的强度大于10 g / d。这些性能大大高于对照纤维。有人解释了使用hIB纺丝的LMW聚合物对高强度纤维的结构发展的解释。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42747。

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