Characterization of branched polydisperse polymers. Influence of solvents on the branching parameters | Zendy

Dobkowski Zbigniew | Zendy

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Characterization of branched polydisperse polymers. Influence of solvents on the branching parameters

Author(s) -

Dobkowski Zbigniew

Publication year - 1985

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1985.070300131

Subject(s) - branching (polymer chemistry) , polymer , radius of gyration , macromolecule , gyration , exponent , polymer chemistry , linear polymer , thermodynamics , chemistry , materials science , organic chemistry , physics , mathematics , geometry , biochemistry , linguistics , philosophy

The influence of solvents on the branching degrees G (the ratio of intrinsic viscosities) and g (the ratio of radii of gyration), and on the branching exponent b in equation G = g b has been estimated using the recently reported equations for branched polymers. The following relations have been found: G < ḡ 0 , ḡ x , = ḡ x 0 , and b > b 0 , where subscripts 0 and x denote the unperturbed (or theta) conditions and the type of average value for polydisperse polymers, respectively. Hence the expansion coefficients of branched and linear macromolecules are related by α η,br < α η,lin and α s br = α s ,lin .

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