木粉聚醚的流变性研究

Studyon the Rheological Properties of Wood Flour Polyether

在新近开发成功的木粉聚氨酯新材料合成技术的基础上，对关键中间体木粉聚醚的流变性质、粘流温度效应进行研究。应用ＮＤＪ－１型旋转粘度计测得３０℃时木粉聚醚的流变数据和不同温度下的粘度数据。根据切变行为图和Ｍｅｔｚｎｅｒ方程，确定木粉聚醚为拟塑性流体，其表现粘度随剪切速串增大而明显降低，呈现剪切变稀的非牛顿流体特性。不同温度下木粉聚醚的粘度符合Ａｒｒｈｅｎｉｕｓ方程，据此求得木粉聚醚的流动活化能为５５．６ｋＪ／ｍｏｌ。

This paper deals with the study on the effect of flowability and viscous flow temperatureof the key intermediate-wood flour polyether on the synthesis of wood flour polyurethane. We measured the flow behavior data and viscous data of wood flour polyether atdifferent temperatures with a rotary viscometer of the NDJ-1 type. It is found that woodflour polyether is a pseudoplastic fluid with its apparent viscosity rapidly decreasing within-creasing shear rate, showing the characteristics of a non-Newtonian fluid.The viscosities of wood flour polyether at different temperatures conform to Arrhenius equation, and the activation energy for the flow process(E)of wood flour polyether iscalclilated as 55. 6kJ/mol.