Optical extinction and refraction of concentrated latex dispersions
Optical extinction and refraction of concentrated latex dispersions
复制标题
浓缩乳胶分散体的消光和折射
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
G. Meeten
中科院分区：
文献类型：
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作者：
A. Killey;G. Meeten
给出了一种用于测量浓度高达50%固体的胶体分散体的消光系数的装置的实验细节。对于所有的分散体检查的光学消光表现出最大值作为浓度的函数。光学消光或浊度被解释为复折射率n的虚部。本文提出了一个关于集中色散的n的近似理论。该理论考虑到相邻粒子的影响上的散射截面的一个特定的散射体通过使用的概念的局部径向分布的折射率。计算机计算的基础上的理想化的折射率分布进行比较与实验数据的真实的和虚部的n。
Experimental details are given of an apparatus which has been used to measure the optical extinction of colloidal dispersions with concentrations as high as 50% solids. For all dispersions examined the optical extinction showed a maximum as a function of concentration. Optical extinction, or turbidity, is interpreted as the imaginary part of the complex refractive index, n. An approximate theory of n for concentrated dispersions is presented. The theory takes into account the effect of neighbouring particles on the scattering cross-section of a particular scatterer by using the concept of a local radial distribution of refractive index. Computer calculations based on an idealised refractive-index profile are compared with experimental data for both real and imaginary parts of n.