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首页> 外文期刊>繊維学会誌 >Structural Changes in Poly(ethylene terephthalate) Induced by Supercritical Carbon Dioxide Containing a Cosolvent as a Modifier
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Structural Changes in Poly(ethylene terephthalate) Induced by Supercritical Carbon Dioxide Containing a Cosolvent as a Modifier

机译：含助溶剂超临界二氧化碳改性聚对苯二甲酸乙二醇酯的结构变化

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摘要

In order to investigate the structural changes in PET yarn induced by scCO_2 treatment and the effect of the additive 1-BuOH on these structural changes, WAXD measurements, DSC analysis and FT-Raman spectroscopy analysis were performed for undrawn PET gut yarn treated with pure scCO_2 (120℃, 25 MPa) or scCO_2/1-BuOH (120℃, 25 MPa/5.0 mol%). The PET yarn treated with pure scCO_2 had a semi-crystalline structure with small and imperfect crystallites and oriented amorphous supermolecular segments. The yarn treated with scCO_2/1-BuOH showed higher crystallinity and lower distribution of extended chains, such as oriented supermolecular segments, in the amorphous region than the yarn treated with pure scCO_2. Based on these results, we hypothesized on the process of structural change in scCO_2 and in scCO_2/1-BuOH. We found that the addition of 1-BuOH to scCO_2 brings about a significant change in the structure of the PET gut yarn immersed in scCO_2.
机译：为了研究scCO_2处理引起的PET纱线的结构变化以及添加剂1-BuOH对这些结构变化的影响，对纯scCO_2处理的未拉伸PET肠纱进行了WAXD测量，DSC分析和FT拉曼光谱分析（120℃，25 MPa）或scCO_2 / 1-BuOH（120℃，25 MPa / 5.0 mol％）。用纯scCO_2处理的PET纱具有半结晶结构，具有小的和不完美的微晶以及定向的无定形超分子链段。与纯scCO_2处理的纱线相比，scCO_2 / 1-BuOH处理的纱线在非晶区域显示出更高的结晶度和更低的延伸链分布，例如定向超分子链段。基于这些结果，我们假设了scCO_2和scCO_2 / 1-BuOH中的结构变化过程。我们发现，将1-BuOH添加到scCO_2中会导致浸泡在scCO_2中的PET肠纱结构发生重大变化。

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