Dielectric normal‐mode relaxation of entangled  cis ‐polyisoprene melts: Effects of polydispersity | Zendy

Fodor Jeffrey S. | Zendy; Hill Davide A. | Zendy

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Dielectric normal‐mode relaxation of entangled cis ‐polyisoprene melts: Effects of polydispersity

Author(s) -

Fodor Jeffrey S.,

Hill Davide A.

Publication year - 1994

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.1994.070531206

Subject(s) - dispersity , reptation , relaxation (psychology) , dielectric , spectral line , materials science , thermodynamics , polymer chemistry , chemistry , chemical physics , polymer , physics , quantum mechanics , psychology , social psychology , optoelectronics , composite material

The effects of polydispersity on the dielectric normal‐mode relaxation of entangled, cis ‐polyisoprene melts are considered. We use a linear mixing rule and reptation theory in conjunction with a theoretical molecular weight distribution (MWD) of variable breadth to predict loss spectra of model cis ‐polyisoprene melts. The half‐widths of the predicted spectra show a nonlinear dependence on polydispersity index, with the greatest sensitivity near the monodisperse limit. The calculations are in agreement with literature data on narrowly dispersed samples. © 1994 John Wiley & Sons, Inc.

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