化学和机械后处理回收PET纤维的结晶性

IF 0.9 Q4 ENGINEERING, MECHANICAL

Tire Science and Technology Pub Date : 2023-03-20 DOI:10.2346/tire.23.22020

Leyao Wu, Gavan W. Lienhart, S. Basak, S. Jana, Kevin A. Cavicchi, J. Eagan

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引用次数: 0

摘要

研究了聚对苯二甲酸乙二醇酯（PET）材料中间苯二甲酸酯（iso）含量对其结晶度（χ%）和力学性能的影响。熔融共混物由原始（0等重量%）和瓶级（1.7等重量%的）PET制备，随后纺成纤维。采用差示扫描量热法（DSC）、X射线衍射法（XRD）和单轴拉伸试验测定了其力学性能和结晶度。DSC和XRD测定的结晶度结果量化了材料中iso含量与χ%之间的关系。研究发现，不同等级间苯二甲酸酯的熔融混合对熔融温度（Tm）和χ%的影响小于化学回收的对苯二甲酸酯和间苯二酸酯无规共聚物。进一步表明，<0.25 iso-wt.%的无规共聚物具有与原始高模量低收缩（HMLS）材料相当的结晶度。

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Crystallinity of Recycled PET Fibers from Chemical and Mechanical Reprocessing

This work investigated the effect of isophthalate (iso) content in poly(ethylene terephthalate) (PET) materials on its degree of crystallinity (χ%) and mechanical properties. Melt blends were prepared from virgin (0 iso-wt.%) and bottle-grade (1.7 iso-wt.%) PET and subsequently spun into fibers. The mechanical and crystallinity properties were determined using differential scanning calorimetry (DSC), X-ray diffraction (XRD), and uniaxial tensile testing. The crystallinity results determined from DSC and XRD quantified the relationship between iso-content and χ% in the materials. It was found that melt-mixing of different isophthalate grades had a lesser effect on melting temperature (Tm) and χ% than chemically recycled random copolymers of terephthalate and isophthalate. It was further shown that random copolymers of <0.25 iso-wt.% had comparable crystallinity to the virgin high-modulus low-shrink (HMLS) materials.

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来源期刊

Tire Science and Technology ENGINEERING, MECHANICAL-

CiteScore

2.10

自引率

0.00%

发文量

期刊介绍： Tire Science and Technology is the world"s leading technical journal dedicated to tires. The Editor publishes original contributions that address the development and application of experimental, analytical, or computational science in which the tire figures prominently. Review papers may also be published. The journal aims to assure its readers authoritative, critically reviewed articles and the authors accessibility of their work in the permanent literature. The journal is published quarterly by the Tire Society, Inc., an Ohio not-for-profit corporation whose objective is to increase and disseminate knowledge of the science and technology of tires.