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《Materials Review》 2007-S2
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Study of Microwave Selective Action on Polyester Hydrolytic Depolymerization

ZHAO Xiaofei, LIU Lixin, LI Jie, BI Lina, ZHANG Dong ( School of Chemistry & Chemical Engineering, DaQing Petroleum Institute, Daqing 163318; Institute of Applied Chemistry, Wenzhou Normal College, Wenzhou 325027)  
The hydrolytic depolymerization of Polyethylene terephthalate (PET)and polybutylece terephthalate (PBT) under microwave irradiation is studied in this paper. The experimental results for PET and PBT are compared for samples processed at 2MPa for 120 min, at 800W and with weight ratio of water to PET of 10 : 1. PET completely depolymerized to terephthalate acid(TPA) and ethylene glycol(EG). However, the maximum degree of PBT depolymerization only 1.59%. The results indicate that microwaves are highly selective in activating reaction pathways. When compare with traditional heating methods, there are clearly non-thermal effects contributing to the microwave depolymerization of PET.
【CateGory Index】: O631.5
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