玻纤在聚醚多元醇中的分散行为研究

Study of Dispersion Behavior of Glass Fibers in Polyether Polyols

研究了聚醚多元醇和玻纤/聚醚多元醇体系粘度随温度改变的变化规律,讨论了玻纤加入量对混合体系粘度的影响,采用行星搅拌器研究了玻纤/聚醚多元醇体系在外场作用下的分散效果。结果表明:聚醚多元醇的粘度与温度的关系符合Arrhenius公式,粘流活化能为51·4kJ/mol;加入玻纤增大了体系的粘度;由于浸润作用的影响,随着混合时间的增加,体系的粘度初期迅速上升,然后缓慢下降,逐步达到平衡值;混合60min后玻璃纤维在体系中基本呈单丝分散。

The rule of the change of the viscosity of polyether polyols and glass fiber/polyether polyols with temperature fluctuation was studied, the effect of glass fiber content on the viscosity of the mixing system was discussed, and the dispersion of glass fiber/polyether polyols under external action was studied by means of planet stirrer. The experimental results showed that the relation between temperature and viscosity of polyether polyols agreed with the Arrhenius formula, and the flow activation energy of the polyether polyols was 51.4kJ/mol; the addition of glass fiber made the viscosity of the mixture higher; and because of the effect of soakage and with the increase of the mixing time, the viscosity of the mixture increased quickly in the initial stage, then decreased slowly, and reached its equilibrium value. The glass fiber dispersed in the mixture in the form of monofilament when the mixing time was about 60 min.