反相高效液相色谱法分析超临界甲醇解聚聚对苯二甲酸乙二醇酯的产物

摘　要：配合超临界甲醇解聚聚对苯二甲酸乙二醇酯的工艺开发，采用高效液相色谱法对聚对苯二甲酸乙二醇酯的超临界甲醇解聚固体产物进行了分离、定性和定量分析。采用反相色谱体系，色谱柱为Zorbax-C₈柱，流动相为甲醇水(70/30,V/V)，紫外检测器。该法具有高色谱分辨率、简便、准确、重复性好等特点。

关键词：高效液相色谱法，聚对苯二甲酸乙二醇酯，解聚

分类号：065　文献标识码：A

Determination of Depolymerization Products in Supercritic al Methanolysis of Poly(ethylene terephthalate)polyester by Reversed Phase High Performance Liquid Chromatography??

Yang Yong（State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001）　
Zhang Changming（State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001）　
Xu Yuanyuan（State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001）　
Li Yongwang（State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001）　
Xiang Hongwei（State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001）　

Abstract：qualitative and quantitative analysis of solid depolymerization products for supercritical methanolysis of ploy(ethylene terephthalate) polyester (PET) were studied by means of reversed?phase high performance liquid chromatogr aphy on Zorbax-C₈(4.6mm×250mm) with 70%(V/V) methanol as mobile phase. The results showed that the solid depolymerization products were mainly composed of dimethyl terephthalate (DMT), methyl（2hydroxyethyl)terephthalate (MHET), bis(hydroxyethyl)tere phthalate (BHET), dimers and oligomers, which could be separated effectively under the above chromatographic conditions. The calibration curves of DMT and BHET were linear in the range of １.0～45 mg/L (n=8), r=0.9998～1.0000 and RSD＜2.8%. The determination limits of DMT and BHET were 4.0×10^-4μg and 6.0×10^-4μg respectively. ?
Keywords：Reversed phase high performance liquid chromatography, ploy(ethylene terephthalate)polyester, depolymerization

参考文献：

［1］Tang Weirong (唐伟荣). Chemical Technology Marke t(化工科技市场)1999,7:8?10
［2］Paszun D, Spychaj T, Ind. Eng. Chem. Res., 1997, 36(4):1373～1383
［3］Yang Yong（杨勇）, Xiang Hongwei（相宏伟）,Xu Yuanyuan（徐元源）, Li Yongw ang（李永旺）. Proceeding of 3rd International Workshop on Green Chemistry（第三次国际绿色化学研讨会论文集）.Guangzhou（广州）, 2000:48～50
［4］Yamanis J, Vikenchich R, Adelman M. J. Chromatogr., 1975,108:79～84
［5］Song Jirong(宋纪蓉).Chinese J. Chromatogr.(色谱), 1989, 7(2):118～119
［6］Dalian Institute of Chemical Physics, CAS（中国科学院大连化学物理研究所）,Gas Chromatography(气相色谱法). Beijing(北京 ) : Science Press(科学出版社), 1972:146～152

收稿日期：2000年7月20日

修稿日期：2000年11月23日

出版日期：2001年6月1日