Preparation of PET using homogeneous catalysts. II. Effect of BHPP, NPG and PD in Sb2O3 glycol solution catalysts |
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| Authors: | Tae Won Son Hae Shik Son Won Ki Kim Dong Won Lee Kwang Il Kim Jae Hun Jeong |
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| Institution: | (1) School of Textiles, Yeungnam University, Kyungsan, Korea;(2) Tongkook Synthetic Fibers Co., Ltd., Kumi, Korea |
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| Abstract: | In the polycondensation reaction of polyethyleneterephthalate(PET), Sb2O3 can react effectively as a catalyst, if physically transformed. Sb2O3 powder is transformed into liquid solution by dissolving in ethylene glycol(EG). Homogeneous catalyst is made by mixing this
liquid solution with glycols having different solubility. The efficient reaction of PET polymerization is expected by using
homogeneous catalyst. PET was synthesized using homogeneous catalysts of 4 wt.% Sb2O3 solution dissolved in glycolEG, 2,2-bis(4-(2-hydroxyethoxy)phenol)propane(BHPP), neopentyl glycol(NPG), and 1,3-propandiol(PD)].
PET using EG-BHPP(Sb2O3) catalysts shows the highest I.V. within a reaction time of 120 min. In the p-d analysis, PET using EG-BHPP(Sb2O3) catalysts has the fastest propagation rate and slowest degradation rate. EG-BHPP(Sb2O3) catalysts are more efficient than EG(Sb2O3) catalysts and Sb2O3 powder catalysts. |
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