染料标记聚合物剪切溶液中的荧光去极化

S. Claesson, H. Odani
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引用次数: 8

摘要

用荧光去极化的方法研究了聚合物链在剪切溶液中的微布朗运动。设计了一种测定剪切溶液极化程度的装置,并对羟乙基纤维素水溶液中的荧光素进行了测量,这两种溶液都标记在聚合物链上并自由分散。极化程度与研究区域(0-104 s-1)的剪切速率无关,但溶液的流动粘度表现出明显的非牛顿性质。在葡聚糖和聚苯乙烯的浓溶液中观察到类似的行为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fluorescence depolarization in sheared solutions of dye-tagged polymers
The micro-Brownian motion of a polymer chain in sheared solutions has been studied by means of fluorescence depolarization. An apparatus for determining the degree of polarization of sheared solutions was designed, and measurements were made on fluorescein in aqueous hydroxyethyl cellulose solutions, both tagged to the polymer chains and freely dispersed. The degree of polarization was independent of rate of shear in the region studied, 0-104 s–1, though the flow viscosity of the solutions showed marked non-Newtonian nature. Similar behaviour was observed for concentrated solutions of dextran and polystyrene.
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