NMR characterization of pentaerythritol glycolysis products of polyethylene terephthalate

被引：0

作者：

Monroy-Barreto, Minerva ^{[1
]}

Esturau-Escofet, Nuria ^{[2
]}

Romero-Avila, Margarita ^{[3
]}

Recillas-Mota, Jesus ^{[4
]}

机构：

[1] Univ Nacl Autonoma Mexico, Fac Quim, Unidad Apoyo Invest & Ind, Mexico City, DF, Mexico

[2] Univ Nacl Autonoma Mexico, Inst Quim, Mexico City 04510, DF, Mexico

[3] Univ Nacl Autonoma Mexico, Fac Quim, Dept Quim Organ, Mexico City, DF, Mexico

[4] Comis Fed Protecc Riesgos Sanitarios, Comis Control Anal & Ampliac Cobertura, Mexico City, DF, Mexico

来源：

INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION | 2017年 / 22卷 / 01期

关键词：

Glycolysis; NMR characterization; pentaerythritol esters; recycling polyethylene terephthalate; POLY(ETHYLENE-TEREPHTHALATE); DEPOLYMERIZATION; POLYESTERS; PET;

D O I：

10.1080/1023666X.2016.1219835

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The degradation of polyethylene terephthalate (PET) bottles has been successfully achieved by depolymerization through glycolysis with pentaerythritol. The reaction was performed at 250 degrees C in the presence of an organotin catalyst. The glycolyzed products were characterized by 1D and 2D nuclear magnetic resonance (NMR) spectroscopy. The existence of the chemical bond between the polyol and the PET was detected through heteronuclear multiple bond correlation spectroscopy, and the NMR signals of different species were separated according to their diffusion coefficient by diffusion-ordered spectroscopy. This method offers a rapid quantification of glycolyzed products. Furthermore, it was found that the major product was the mono-pentaerythritol ester followed by the di-pentaerythritol ester, and lastly the tri-pentaerythritol ester.

引用

页码：11 / 16

页数：6

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