Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide

HE Qiuxing; LIU Rui; TU Weiping

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Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide

更新时间：2025-12-10

- Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide
- CIESC Journal Issue 9, Pages: 2366-2370(2008)
- 作者机构：
  
  1. 广东药学院药科学院
  2. 华南理工大学化工与能源学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 September 2008，
  
  Published：05 September 2008
- 稿件说明：
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HE Qiuxing, LIU Rui, TU Weiping. Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide[J]. CIESC Journal, 2008, (9): 2366-2370.
DOI：

HE Qiuxing, LIU Rui, TU Weiping. Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide[J]. CIESC Journal, 2008, (9): 2366-2370. DOI：

摘要

采用原位聚合法制备了纳米铋掺杂氧化锡/水性聚氨酯复合材料。研究了纳米铋掺杂氧化锡(nano-BTO)存在下对聚氨酯(PU)合成反应动力学的影响。研究表明，体系中添加了nano-BTO粒子后，由于nano-BTO的高度反应活性及其表面的Sn原子具有催化反应特性，降低了氨酯化反应的活化能，使异氰酸酯基(—NCO)与羟基(—OH)反应的活化能由18.71 kJ·mol-1·K-1降低到16.29 kJ·mol-1·K-1，加快—NCO与—OH的反应速率。

Abstract

Bismuth-doped tin dioxide nanosized particles (nano-BTO)/waterborne polyurethane (PU) composite coatings were prepared by the in-situ polymerization method.The influences of nano-BTO on the reaction kinetics of synthesizing polyurethane were studied.The results showed that reaction rate between the —NCO and —OH groups increased when nano-BTO was added.nano-BTO was highly active and the Sn atom acted as the catalyst which reduced the activation energy between the —NCO group and —OH groups from 18.71 kJ·mol-1·K-1 to 16.29 kJ·mol-1·K-1.

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