PMMA熔体黏度影响因素实验研究  

Experimental Study on Factors Affecting PMMA Melt Viscosity

作　　者：王海雄[1] 吕永虎 李积彬[3] 

机构地区：[1]桂林理工大学机械与控制工程学院,广西桂林541004 [2]南方科技大学材料科学与工程系,广东深圳518060 [3]深圳大学机电与控制工程学院,广东深圳518060

出　　处：《中国塑料》2016年第2期75-78,共4页China Plastics

摘　　要：针对不同类型的聚甲基丙烯酸甲酯(PMMA)材料熔体的黏度开展实验研究。结果表明,3种不同的PMMA材料因相对分子质量大小的不同而使其流变特性存在一定的差异,在相同的温度下和压力下,相对分子质量越大,剪切黏度越大。随着挤出压力的增加,剪切速率则增加,剪切黏度减小,呈现剪切变稀的特征。同时剪切黏度随温度的变化也较为显著,随着温度的增加,剪切黏度变小,当温度达到280℃,3种材料的剪切黏度逐渐变得相等。Experimental study was carried out showed that rheological behavior of three different, and under the same temperature on the melt viscosity of different types of PMMA. It PMMA was different because their molecular was and pressure, the higher the molecular weight, the larger the viscosity. With increasing extrusion pressure the shear rate increased, shear viscosity decreased, so the melt gave the characteristics of shear thinning. With increasing temperature, the shear viscosity decreased, and gradually become equal when the temperature reached 280 ℃.

关 键 词：聚甲基丙烯酸甲酯 黏度 熔体流动速率 

分 类 号：O633.14[理学—高分子化学]