{"title":"Analysis of Dynamic Light Scattering from Transient Gels","authors":"R. Nossal","doi":"10.1364/pcta.1988.pcs132","DOIUrl":null,"url":null,"abstract":"The possibility of using dynamic light scattering to measure parameters describing the dynamic response of transiently bonded gels is investigated. When a sample is subjected to externally imposed mechanical excitation, a resonance in the frequency dependence of the response will be observed if the relaxation times for bond formation and breakage are long on a timescale determined by the dimensions and the instantaneous shear modulus of the sample. However, if the relaxation is fast on such a timescale, the response does not show resonance behavior and is maximal at zero frequency. Analytical expressions are provided that relate the half-widths of spectral response to kinetic parameters pertaining to the internal restructuring of the gel matrix.","PeriodicalId":371566,"journal":{"name":"Photon Correlation Techniques and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Photon Correlation Techniques and Applications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1364/pcta.1988.pcs132","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The possibility of using dynamic light scattering to measure parameters describing the dynamic response of transiently bonded gels is investigated. When a sample is subjected to externally imposed mechanical excitation, a resonance in the frequency dependence of the response will be observed if the relaxation times for bond formation and breakage are long on a timescale determined by the dimensions and the instantaneous shear modulus of the sample. However, if the relaxation is fast on such a timescale, the response does not show resonance behavior and is maximal at zero frequency. Analytical expressions are provided that relate the half-widths of spectral response to kinetic parameters pertaining to the internal restructuring of the gel matrix.
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