Hydration study of PEG/water mixtures by quasi elastic light scattering, acoustic and rheological measurements
Hydration study of PEG/water mixtures by quasi elastic light scattering, acoustic and rheological measurements
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DOI：
10.1021/jp014345v
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发表时间：
2002-10-03
影响因子：
3.3
通讯作者：
Romeo, G
中科院分区：
文献类型：
--
作者：
Branca, C;Magazù, S;Romeo, G
为了研究聚乙二醇（PEG）的水化效应及其对分子量的依赖性，本文报道了不同平均分子量的PEG水溶液在不同浓度和温度下的粘度、可压缩性和准弹性光散射测量结果。特别是，超声波技术允许在不同聚合度下评估PEG样品的水合数。超声波技术推导出的值，然后与那些推导出的粘度数据以下的Linow和Philipp的模型。PCS技术允许获得关于流体动力学半径及其在不同温度值下对聚合物M-w的依赖性的信息。
To study the hydration effect of poly(ethylene glycol) (PEG) and its dependence on the molecular weight, we report viscosity, compressibility, and quasi elastic light-scattering measurements on aqueous solutions of PEG with different mean molecular weight, M-w at different concentration and temperature values. In particular, ultrasonic technique allows to evaluate the hydration number for PEG samples at different polymerization degrees. The values deduced by ultrasonic technique are then compared with those deduced from viscosity data following the Linow and Philipp's model. PCS technique allows to obtain information on the hydrodynamic radius and its dependence on the polymer M-w at different temperature values.