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首页> 外文期刊>Journal of Applied Polymer Science >Properties of recycled and virgin poly(ethylene terephthalate) blend fibers
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Properties of recycled and virgin poly(ethylene terephthalate) blend fibers

机译：再生和原始聚对苯二甲酸乙二醇酯混纺纤维的性能

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摘要

Material from recycled poly(ethylene terephthalate) (PET) chips obtained from used water bottles was extruded with virgin fiber-grade PET chips in blends of 20, 40, and 70 wt %. Filament fibers from the recycled/virgin PET blends were spun using a melt spinning process and drawn by a thermal drawing process to improve their mechanical properties. As the virgin PET chips were compounded with recycled PET chips, the thermal degradation temperature (T_d) and the melting temperature (T_m) were increased, and the crystallization temperature (T_c) and crystallization rate were decreased. This means that virgin PET has a better thermal stability but a lower crystallization rate than recycled PET. The double melting behavior observed in the case of the drawn fibers may have been a consequence of larger crystallites or areas of crystallites being formed during the thermal drawing process. The birefringence and mechanical properties, such as tensile strength and tensile modulus, increased and elongation at break decreased for the drawn fibers, and this was attributed to the orientation induced during crystallization. The effect of the virgin PET content in the blends on mechanical properties was investigated; 30/70 wt % recycled/virgin blended fibers showed comparable mechanical properties to virgin PET fibers.
机译：将来自用过的水瓶的回收的聚对苯二甲酸乙二醇酯（PET）切片的材料与原始的纤维级PET切片以20、40和70 wt％的混合物挤出。使用熔体纺丝工艺对来自回收/原始PET共混物的长丝纤维进行纺丝，并通过热拉伸工艺对其进行拉伸，以改善其机械性能。由于将原始的PET碎片与回收的PET碎片混合在一起，热降解温度（T_d）和熔融温度（T_m）升高，结晶温度（T_c）和结晶速率降低。这意味着与回收的PET相比，纯净的PET具有更好的热稳定性，但结晶率更低。在拉伸纤维的情况下观察到的双重熔融行为可能是在热拉伸过程中形成较大的微晶或微晶区域的结果。拉伸纤维的双折射和机械性能（例如拉伸强度和拉伸模量）增加，断裂伸长率降低，这归因于结晶过程中引起的取向。研究了共混物中原始PET含量对机械性能的影响。 30/70 wt％的再生/原始混纺纤维表现出与原始PET纤维相当的机械性能。

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