循环再利用聚酯纤维鉴别方法的研究(二)Study on Identification Method of Regenrated Polyester Fiber
付昌飞,李红杰,陆秀琴
FU Chang-fei,LI Hong-jie,LU Xiu-qin
摘要(Abstract)：
涤纶主要成分为聚对苯二甲酸乙二醇酯,也同时存在砌入大分子结构的异质链节和游离于大分子之外的齐聚物。再生涤纶制备过程会引起大分子异质链节和齐聚物含量以及分布的变化。通过对涤纶样品解聚或萃取等前处理方法,获得含有大分子异质链节或齐聚物的溶液,再经高效液相色谱测试,检测信号即可反映大分子异质链节和齐聚物的分布曲线,探寻能够反映再生涤纶和原生涤纶差异的停留时间段的信号强弱,达到再生涤纶的定性鉴别目的。该方法突破了国内外通过间苯二甲酸单元和聚集态结构等检测方法应用范围极其狭窄的技术瓶颈。
The main component of polyester(PET) fibers is polyethylene terephthalate, and there are heterogenous chains and free oligomers lining in macromolecular structure. The process of regenerated PET fibers will cause the changes in the content and distribution of heterogenous chains and free oligomers. The solution containing heterojunctions chains or free oligomers was obtained by pre-treatment methods such as depolymerization or extraction of PET samples, and then tested by high performance liquid chromatography.The detection signal can reflect the distribution curve of heterojunctions lines and free oligomers, and explore the signal strength of residence time which can reflect the difference between regenerated polyester(PET) and raw PET, so as to achieve the purpose of qualitative identification of regenerated PET. It breaks through the technical bottleneck of narrow application scope of detection methods such as isophthalic acid unit and aggregate structure at home and abroad.
关键词(KeyWords)：
再生涤纶;鉴别;异质链节;齐聚物;指纹峰
regenerated PET;identification;heterogenous chain;free oligomer;fingerprint peak
基金项目(Foundation): 国家重点研发计划重点基础材料技术提升与产业化重点专项《再生聚酯纤维高效制备技术》(项目编号2016YFB0302900)
作者(Author):
付昌飞,李红杰,陆秀琴
FU Chang-fei,LI Hong-jie,LU Xiu-qin
DOI: 10.16090/j.cnki.hcxw.2019.07.002