文献类型：期刊文献

英文题名：Degradation of Poly(butylene terephthalate) in Different Supercritical Alcohol Solvents

作者：Yang, Junhe[2];Huang, Jie[1];Chyu, Minking K.[3];Wang, Qing-Ming[3];Xiong, Danliu[1];Zhu, Zibin[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Shanghai Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200093, Peoples R China;[3]Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA

年份：2010

卷号：116

期号：4

起止页码：2269

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20100912742549);WOS:【SCI-EXPANDED(收录号:WOS:000275434800051)】；

基金：Contract grant sponsor: National Natural Science Foundation of the People's Republic of China; contract grant number: 50773040.

语种：英文

外文关键词：degradation; monomers; recycling

摘要：Reactions were carried out in a batch autoclave reactor. Poly(butylene terephthalate) (PBT) and different alcohol solvents were used in the vessel. The reaction products were analyzed by infrared spectroscopy and gas chromatography/mass spectrometry. Alcoholysis of PBT occurred in supercritical methanol, ethanol, and propanol, and we obtained dimethyl terephthalate (DMT), diethyl terephthalate (DET), and dipropyl terephthalate (DPT), respectively. The conversion of PBT at different temperatures showed similar trends but different degradation degrees. The reactivity for the alcoholysis of PBT in supercritical methanol was much higher than those in supercritical ethanol and propanol. DMT and 1,4-butanediol obtained from the depolymerization of PBT in supercritical methanol reached 98.5 and 72.3%, respectively, at 583 K for 75 min. The yield of DET reached 76% for 75 min. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 116:2269-2274, 2010