Stannous oxalate: An efficient catalyst for poly(trimethylene terephthalate) synthesis |
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| Authors: | Jia ShuYong Ren YuRong Zhang Dan Hu Jing Zeng Yi and Wang GongYing |
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| Institution: | (1) Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, China;(2) College of Chemistry, Jilin Normal University, Siping, 136000, China;(3) Changzhou Institute of Chemistry, Changzhou, 213164, China;(4) Graduate University of Chinese Academy of Sciences, Beijing, 100039, China |
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| Abstract: | A complete study on the catalytic activity of stannous oxalate for poly(trimethylene terephthalate) (PTT) synthesis via esterification method is carried out by comparison to the well known catalysts (tetrabutyl titanate (TBT), dibutyltin oxide (Bu2SnO), and stannous octoate (SOC)). Their catalytic activity in the esterification process is monitored by measuring the amount of water generated, while intrinsic viscosity (IV) and content of terminal carboxyl groups (CTCG) are used as the index in the polycondensation process. Stannous oxalate shows higher activity than the other catalysts. Decrease in reaction time and improvements in PTT property are observed. The higher catalytic activity of stannous oxalate is attributed to its chelate molecular structure. |
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| Keywords: | stannous oxalate poly(trimethylene terephthalate) 1 3-propanediol esterification method |
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