Distribution analyses of multi-modal dynamic light scattering data
Distribution analyses of multi-modal dynamic light scattering data
复制标题
DOI：
10.1016/j.polymer.2006.06.060
复制
发表时间：
2006-08-23
期刊：
影响因子：
4.6
通讯作者：
Okabe, Satoshi
中科院分区：
文献类型：
--
作者：
Shibayama, Mitsuhiro;Karino, Takeshi;Okabe, Satoshi
本文提出了一种动态光散射数据分析方法，用以计算稀溶液中少量大聚集体的质量分数w（R-h），其中R-h为流体动力学半径。我们研究了模型多模态系统的散射强度的时间相关函数，即，具有不同粒径的胶乳溶液和具有不同分子量的聚苯乙烯标准溶液的混合物，通过适当考虑各组分的未知分数w（R-h）和散射强度。我们推导出一个方程来计算组分的重量分数。通过对观测到的具有快模和慢模的相关函数的重建，验证了该方法的有效性。作为证明，评估了作为温度的函数的热敏聚合物水溶液中的聚集体的分数。(c)2006爱思唯尔有限公司保留所有权利。
A method of data analysis for dynamic light scattering is proposed to evaluate the weight fraction, w(R-h), of a small amount of large aggregates in a dilute solution, where R-h is the hydrodynamic radius. We examined the time-correlation function of scattering intensity for model multi-modal systems, i.e., mixtures of latex solutions having different particle sizes and of polystyrene standard solutions having different molecular weights, by properly taking into account the unknown fractions, w(R-h), and scattering intensities of individual components. We derived an equation to evaluate the weight fractions of the components. The validity of this method was verified by successfully reconstructing the observed correlation functions having fast and slow modes. As a demonstration, the fraction of aggregates in a thermosensitive polymer solution in water was evaluated as a function of temperature. (c) 2006 Elsevier Ltd. All rights reserved.