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Viscoelastic properties of suspensions with weakly interacting particles

机译:具有弱相互作用粒子的悬浮液的粘弹性质

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Rheological characterization of a model suspension containing hydroxyl-terminated polybutadiene and glass beads with filler concentration up to 30% by volume was performed by using a Haake parallel disk rheometer. The rheological tests conducted were the measurement of the storage modulus, G', loss modulus, G ", and complex viscosity, eta*, as functions of the frequency and the steady shear viscosity as a function of the shear rate. The linear viscoelastic region was determined to extend up to 50% strain by measuring G', G ", and eta* as functions of strain amplitude. By using multiple gap separations between the disks, it was found that the suspension did not exhibit slip at the walls of the rheometer. G' and G " were used to determine the relaxation times distribution, G(i)(lambda(i), empty set) as functions of the relaxation time, lambda(i), and the filler content, empty set. The relaxation moduli, G(i)(lambda(i), empty set), decreased with the relaxation time, but increased with the filler content. The Cox-Merz rule was also observed to be valid for these suspensions. (C) 1998 John Wiley & Sons, Inc. [References: 23]
机译:使用Haake平行盘流变仪对包含羟基封端的聚丁二烯和填充剂浓度最高为30%的玻璃珠的模型悬浮液进行流变学表征。进行的流变测试是测量储能模量G',损耗模量G“和复数粘度eta *(作为频率的函数)和稳态剪切粘度(作为剪切速率的函数)。线性粘弹性区通过测量作为应变幅度的函数的G′,G″和eta *,确定“α”延伸至50%应变。通过在圆盘之间使用多个间隙间隔,发现悬浮液在流变仪的壁上不显示滑动。 G'和G“用于确定弛豫时间分布G(i)(lambda(i),空集)作为弛豫时间lambda(i)和填料含量空集的函数。弛豫模量,G(i)(lambda(i),空集)随着驰豫时间的增加而降低,但随着填料含量的增加而增加,Cox-Merz规则也适用于这些悬浮液(C)1998 John Wiley& Sons,Inc. [参考:23]

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