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《China Synthetic Fiber Industry》 2006-01
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Study on solid-state polycondensation of PET particles

Wang Jianfeng ,Hu Qunhua,Qiu Gao,Xiao Weizhen,Cheng Zhan,Dai Junming College of Science,Donghua University,Shanghai 200051 SINOPEC Yizheng Chemical Fiber Co. ,Ltd. ,Yizheng 211900  
The solid-state polycondensation of PET particles was studied systematically. The drying and crystallization conditions were optimized as drying temperature 14℃ and time 120 min, crystallization temperature 180℃ and time 45 min, chips water content lower than 30 μg/g. The effects of reaction temperature, particle size and N2 flow rate on the solid-state polycondensation of PET were studied. The mechanism of the threshold N2 flow rate was analyzed during the process of solid-state polycondensation. The results showed that the higher the reaction temperature, the smaller the particle, the faster the solid-state polycondensation. The PET prepolymer particles were supposed to solid-state polycondensation at a certain temperature, during which the threshold N2 flow rate can be observed. The interface diffusion rate of PET particles and the reaction rate of the solid-state polycondensation can be maximized under the threshold N2 flow rate at the specified temperature. The smaller the particles, the higher the threshold N2 flow rate.
【Fund】: 国家自然科学基金资助(20276013)
【CateGory Index】: TQ323.41
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