scholarly journals Theory of Nonlinear Viscoelasticity in Temporarily Crosslinked Polymer Systems

1985 ◽  
Vol 17 (4) ◽  
pp. 597-606 ◽  
Author(s):  
Shizuo Hayashi
Keyword(s):  
Nonlinear Viscoelasticity ◽  
Polymer Systems ◽  
Crosslinked Polymer

A Transient Microsphere Model for Nonlinear Viscoelasticity in Dynamic Polymer Networks

2021 ◽  
Vol 89 (1) ◽  
Author(s):  
Samuel Lamont ◽  
Franck J. Vernerey
Keyword(s):  
Nonlinear Viscoelasticity ◽  
Polymer Networks ◽  
Planck Equation ◽  
Network Evolution ◽  
Material Behavior ◽  
Published Data ◽  
Directional Statistics ◽  
Polymer Systems ◽  
Chain Level ◽  
Microsphere Model

Abstract Viscoelastic material behavior in polymer systems largely arises from dynamic topological rearrangement at the network level. In this paper, we present a physically motivated microsphere formulation for modeling the mechanics of transient polymer networks. By following the directional statistics of chain alignment and local chain stretch, the transient microsphere model (TMM) is fully anisotropic and micro-mechanically based. Network evolution is tracked throughout deformation using a Fokker–Planck equation that incorporates the effects of bond creation and deletion at rates that are sensitive to the chain-level environment. Using published data, we demonstrate the model to capture various material responses observed in physical polymers.

Dynamics of Entangled Polymers

2015 ◽  
Author(s):  
Ronald G. Larson ◽  
Zuowei Wang
Keyword(s):  
Large Deformations ◽  
Nonlinear Viscoelasticity ◽  
Polymer Dynamics ◽  
Tube Model ◽  
Concentration Effects ◽  
Polymer Systems ◽  
Entangled Polymers ◽  
Entangled Polymer ◽  
Future Work ◽  
Entangled Polymer Solutions

This article explores the dynamics of entangled polymers, with particular emphasis on how the unusual and often dramatic mechanical properties of concentrated polymer systems are determined by the physics of entanglements. It begins with an overview of the foundations of entangled polymer dynamics, organized around tubes and slip links used in modeling entanglements, the packing length and concentration effects, the results of computer simulations on entanglements, topological contacts, and the effects of large deformations. The focus is on the nature of ‘entanglement’, both from a bottom-up molecular view, and from a phenomenological one. The discussion then turns to the linear viscoelasticity of entangled polymer solutions and melts, along with nonlinear viscoelasticity. Models of polymer dynamics in the linear regime are also described, including the ‘standard tube model’. The article concludes with suggestions for future work.

The structural changes occurring during the synthesis of crosslinked polymer systems based on diisocyanates and alkylene sulphides

1980 ◽  
Vol 22 (12) ◽  
pp. 2940-2946
Author(s):  
Yu.V. Brestkin ◽  
L.S. Andrianova ◽  
G.P. Belonovskaya ◽  
Zh.D. Chernova ◽  
S.Ya. Frenkel'
Keyword(s):  
Structural Changes ◽  
Polymer Systems ◽  
Crosslinked Polymer

scholarly journals Refining rheological model for description of linear and nonlinear viscoelasticity of polymer systems

2021 ◽  
Vol 14 (1) ◽  
pp. 12-29
Author(s):  
A.A. Laas ◽  
M.A. Makarova ◽  
A.S. Malygina ◽  
G.O. Rudakov ◽  
G.V. Pyshnograi
Keyword(s):  
Rheological Model ◽  
Nonlinear Viscoelasticity ◽  
Polymer Systems ◽  
Linear And Nonlinear
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