Model of cooperative relaxation in finite viscoelasticity of amorphous polymers

Aleksey D. Drozdov

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Constitutive equations are derived for amorphous rubbery polymers at finite strains. A polymer is treated as an ensemble of flow units. The viscoelastic response is modeled as rearrangements of relaxing regions occurring at random times. The kinetics of rearrangement is described by the Eyring concept of thermally activated processes. Several phenomenological expressions are proposed for material functions. Adjustable parameters are found by fitting observations for polydienes functionalized by benzoic units, polyisobutylene and polystyrene in tensile and shear relaxation tests. Fair agreement is demonstrated between experimental data and results of numerical analysis.

Original languageEnglish
Pages (from-to)897-909
Number of pages13
JournalInternational Journal of Non-Linear Mechanics
Volume35
Issue number5
DOIs
StatePublished - 1 Jan 2000
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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