CIESC Journal ›› 2008, Vol. 59 ›› Issue (9): 2366-2370.
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HE Qiuxing,LIU Rui,TU Weiping
Online:
Published:
何秋星,刘蕤,涂伟萍
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.
Key words: 纳米铋掺杂氧化锡, 原位聚合法, 聚氨酯, 催化作用, 反应动力学
纳米铋掺杂氧化锡,
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。
关键词: 纳米铋掺杂氧化锡, 原位聚合法, 聚氨酯, 催化作用, 反应动力学
HE Qiuxing, LIU Rui, TU Weiping. Synthesis kinetics of polyurethane with addition of nanosized particles of bismuth-doped tin dioxide[J]. CIESC Journal, 2008, 59(9): 2366-2370.
何秋星, 刘蕤, 涂伟萍. 铋掺杂氧化锡/聚氨酯的原位聚合动力学 [J]. 化工学报, 2008, 59(9): 2366-2370.
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