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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Electrorheology of silicone oil suspensions of urea-modified poly[(glycidyl methacrylate)-co-(ethylene dimethacrylate)] particles
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Electrorheology of silicone oil suspensions of urea-modified poly[(glycidyl methacrylate)-co-(ethylene dimethacrylate)] particles

机译：脲改性的聚[甲基丙烯酸缩水甘油酯-co-（二甲基丙烯酸乙烯酯）]颗粒的硅油悬浮液的电流变学

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摘要

Two methods of modification of poly[(glycidyl methacrylate)-co-(ethylene dimethacrylate)] microspheres with urea were examined in this electrorheological (ER) study. First, the urea functional groups were introduced by chemical modification of the starting copolymer. A significant increase in storage modulus of the silicone oil suspension was observed compared with the loss modulus when an electric field is applied. On the other hand, the ER effect in suspension of particles coated with physically bonded urea was only slightly higher than that of untreated material. This is explained by poor coating of the hydrophobic microparticle surface with hydrophilic urea. According to dielectric measurements, the interfacial polarization was found to be responsible for the formation of chain structure of modified microspheres in the electric field resulting in the ER effect. (C) 2007 Elsevier B.V. All rights reserved.
机译：在此电流变（ER）研究中，研究了用尿素改性聚[（甲基丙烯酸缩水甘油酯）-co-（二甲基丙烯酸乙烯酯）]微球的两种方法。首先，通过起始共聚物的化学改性引入脲官能团。与施加电场时的损耗模量相比，观察到硅油悬浮液的储能模量显着增加。另一方面，涂覆有物理结合尿素的颗粒在悬浮液中的ER效应仅略高于未处理材料。这是由于亲水性尿素对疏水性微粒表面的不良覆盖而造成的。根据介电测量，发现界面极化是导致电场中改性微球链结构形成的原因，从而导致ER效应。 （C）2007 Elsevier B.V.保留所有权利。

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