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

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