Stannous oxalate: An efficient catalyst for poly(trimethylene terephthalate) synthesis
Stannous oxalate: An efficient catalyst for poly(trimethylene terephthalate) synthesis
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DOI：
10.1007/s11426-007-0124-7
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发表时间：
2008-03
影响因子：
9.6
通讯作者：
Jia Shuyong;Ren Yurong;Zhang Dan;Hu Jing;Zeng Yi;Wang Gong-ying
中科院分区：
文献类型：
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作者：
Jia Shuyong;Ren Yurong;Zhang Dan;Hu Jing;Zeng Yi;Wang Gong-ying
通过与钛酸四丁酯（TBT）、氧化二丁基锡（Bu2SnO）和八酸锡（SOC）等常用催化剂的对比，研究了草酸亚锡对酯化法合成聚对苯二甲酸三亚甲基酯（PTT）的催化活性。它们在酯化过程中的催化活性通过测量生成水量来监测，而缩聚过程中则以特征粘度（IV）和端羧基含量（CTCG）作为指标。草酸亚锡的活性高于其他催化剂。反应时间缩短，PTT性能改善。草酸亚锡具有较高的催化活性与其螯合分子结构有关。
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.