{"title":"Electro‐optic birefringence and scattering of concentrated solutions of ethylcellulose","authors":"G. Maitland, O. P. Nwammuo","doi":"10.1002/(SICI)1522-9505(19990701)268:1<1::AID-APMC1>3.0.CO;2-#","DOIUrl":null,"url":null,"abstract":"Photon correlation spectroscopy (PCS) at small scattering vector (kR G ≃ ) and the same is true for the broadening parameters of the decay and rise transients (β r ≃ β d ). The β values were found to decrease with increasing concentration. The experimental results are in qualitative agreement with the theoretical prediction of Doi and Edwards but in quantitative disagreement; thus implying that idealised models are far from describing the true observation. The semi-empirical theory of Douglas and Hubbard aptly described the concentration exponents observed in this work for the zero shear viscosity and the whole chain relaxation data.","PeriodicalId":7808,"journal":{"name":"Angewandte Makromolekulare Chemie","volume":"38 1","pages":"1-12"},"PeriodicalIF":0.0000,"publicationDate":"1999-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Angewandte Makromolekulare Chemie","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1002/(SICI)1522-9505(19990701)268:1<1::AID-APMC1>3.0.CO;2-#","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
Photon correlation spectroscopy (PCS) at small scattering vector (kR G ≃ ) and the same is true for the broadening parameters of the decay and rise transients (β r ≃ β d ). The β values were found to decrease with increasing concentration. The experimental results are in qualitative agreement with the theoretical prediction of Doi and Edwards but in quantitative disagreement; thus implying that idealised models are far from describing the true observation. The semi-empirical theory of Douglas and Hubbard aptly described the concentration exponents observed in this work for the zero shear viscosity and the whole chain relaxation data.
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