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Applications of Prism‐Cell Light‐Scattering Spectrometer to Particle Sizing in Polymer Solutions
Author(s) -
Chu Benjamin,
Xu Renliang,
Nyeo Sulong
Publication year - 1989
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.19890060105
Subject(s) - spectrometer , optics , light scattering , photomultiplier , prism , scattering , laser linewidth , superposition principle , physics , intensity (physics) , light intensity , multiangle light scattering , detector , laser , quantum mechanics
A prism‐cell light‐scattering spectrometer has been modified to accept both a diode‐array detector for measurements of angular distribution of scattered intensity and a photomultiplier tube for measurements of time‐dependent intensity‐intensity correlation function. This spectrometer permits the practice of light scattering at small scattering angles down to a few degrees. Here we make a brief study of the reliability of characteristic linewidth distributions obtained by several methods of analysis on the correlation data, which correspond to a reasonably broad unimodal distribution. Then the prism‐cell light‐scattering spectrometer is used to characterize a polymer solution consisting of two different molecular weights. To obtain characteristic linewidth distribution, the correlation data are analyzed by both the constrained regularization method (CONTIN) and the maximum‐entropy method (MEM).