氢氧化镁阻燃EVAC的流变性能研究  

Rheological Behavior of EVAC/Mg(OH)_2

作　　者：邓爱霞[1] 滕谋勇[1] 陈亚琼[1] 谢倩[1] 胡华雷[1] 于安军[1] 苏亚军[1] 

机构地区：[1]聊城大学材料科学与工程学院,山东聊城252059

出　　处：《工程塑料应用》2012年第11期74-76,共3页Engineering Plastics Application

摘　　要：采用熔融共混法制备了Mg(OH)2阻燃乙烯-乙酸乙烯酯塑料(EVAC),并采用毛细管流变仪对其流变性能进行了研究。讨论了温度、剪切速率和剪切应力对熔体表观黏度的影响;研究了黏流活化能与剪切速率的变化规律。结果表明,熔体的表观黏度随温度的升高而降低,随剪切速率和剪切应力的增大而减小;黏流活化能随剪切速率的增大而降低。其非牛顿指数小于1,说明Mg(OH)2阻燃EVAC为假塑性流体。当剪切应力无限小时,由Spencer-Dillon公式外推得到阻燃EVAC的零切黏度。EVAC / Mg （ OH ） 2 was prepared by melt blending, and the rheological behavior of EVAC / Mg （ OH ） 2 was studied by means of a rheometer. The effect of temperature, shear rate and shear stress on the apparent viscosity of EVAC / Mg （ OH ） 2 melt was discussed. The change of shear rate and the viscous flow activation energy was studied. It showed that the apparent viscosity of melt decreased with the rise of temperature, shear rate, and shear stress. Viscous flow activation energy decreased with increase of shear rate. It＇s non-Newton index was less 1, indicating that Mg （ OH ） 2 flame retardant EVAC belong to fake plastic fluid. When the shear stress infinitely small, flame retardant EVAC＇s zero shear viscosity could be obtained by Spencer- Dillon formula extrapolation.

关 键 词：EVAC 氢氧化镁 流变性能 

分 类 号：O631.2[理学—高分子化学]