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arXiv 0807.1789cond-mat.softcond-mat.mtrl-sci
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水流过polymer凝胶的动力学

Kinetics of water flow through polymer gel

Yasuo Y. Suzuki, Masayuki Tokita, Sata-atsu Mukai

摘要:

用新设计的装置测量了在恒定水压下水通过聚丙烯酰胺凝胶的流量。基于聚合物网络的集体扩散模型,结合聚合物网络与水之间的摩擦力,计算了凝胶中水的流动随时间的演化。摩擦系数由水流的平衡速度确定。的杨氏模量和泊松比的棒状凝胶的单轴伸长实验,确定独立于水流实验的纵向模量测量。与由实验确定的纵向模量和摩擦的值,计算结果与流动实验的时间演变进行了比较。我们发现,水流的时间演化很好地描述了一个单一的特征弛豫时间预测的集体扩散模型与水摩擦耦合。

英文摘要:

The water flow through the poly(acrylamide) gel under a constant water pressure is measured by newly designed apparatus. The time evolution of the water flow in the gel, is calculated based on the collective diffusion model of the polymer network coupled with the friction between the polymer network and the water. The friction coefficient are determined from the equilibrium velocity of water flow. The Young modulus and the Poisson's ratio of the rod shape gels are measured by the uni-axial elongation experiments, which determine the longitudinal modulus independently from the water flow experiments. With the values of the longitudinal modulus and of the friction determined by the experiments, the calculated results are compared with the time evolution of the flow experiments. We find that the time evolution of the water flow is well described by a single characteristic relaxation time predicted by the collective diffusion model coupled with the water friction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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