Chemical degradation of thermoplastic polyurethane for recycling polyether polyol

被引:0
|
作者
Xinkai Wang
Hongbiao Chen
Chiguang Chen
Huaming Li
机构
[1] Xiangtan University,College of Chemistry
[2] Xiangtan University,Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, and Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province
[3] Gaoming Polyurethane Co. Ltd.,undefined
来源
Fibers and Polymers | 2011年 / 12卷
关键词
Glycolysis; Thermoplastic polyurethane; Chemical recycling; Polyether polyol;
D O I
暂无
中图分类号
学科分类号
摘要
Thermoplastic polyurethane, based on 4,4′-diphenylmethane diisocyanate and polyether polyol, was degraded by glycol and ethanolamine at 170 °C. Optimum conditions for the glycolysis of thermoplastic polyurethane were investigated by adjusting the ratio of polymer to degradation reagent, glycol to ethanolamine as well as the reaction temperature. The degradation reaction was conducted under nitrogen atmosphere and accelerated by catalysts such as lithium acetate, which was evidenced by lowering the degradation temperature as well as the amounts of degradation reagent. The decomposition products were completely separated into two layers. The upper liquid layer was a polyether polyol, which was characterized by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The present glycolysis procedure allows a simple recycling of the hydroxyl terminated polyol in pure form.
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页码:857 / 863
页数:6
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