再生聚酯纤维中低聚物的结构表征

采用超声萃取法研究聚酯纤维中低聚物的含量,对再生聚酯商标织物轧光过程中析出灰色粉末主要成分的溶解性能进行分析,并通过红外光谱(FT-IR)、凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)、核磁共振氢谱(1H-NMR)等测试手段对其化学结构进行表征。结果表明:与普通聚酯纤维相比,再生聚酯纤维中所含低聚物的含量较高;该灰色粉末在三氯甲烷中具有较好的溶解性,且根据红外光谱和核磁氢谱测试结果进一步判断,该灰色粉末主要成分为聚对苯二甲酸乙二醇酯三元环状低聚物。

Structure characterization of oligomers in recycled polyester fabric

The mass fraction of loigomers in polyester fiber is analyzed ultrasonic extraction. The solubility property of the main component of gray powder which is separated during the calendering process of recycled polyester trademark fabrics is investigated. The chemical structure is characterized by infrared spectrum (FT-IR), gel permeation chromatography (GPC),differential scanning calorimetry (DSC) and nuclear magnetic resonance spectroscopy (1HNMR). The results show that compared with the common polyester fibers, the recycled polyester fibres have relatively-high mass fraction of loigomers; and the gray powder has good solubility in chloroform, and the main component of gray powder is poly (ethylene terephthalate) three-membered cyclic oligomers determined according to the results of the FT-IR and ¹H-NMR.