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Updated: Sep 1, 2025

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
Published on: August 25, 2016
Tensile strength of rubber described via the formation and rupture of load-bearing polymer chains
1School of Mathematics and Natural Sciences Bergische Universität, D-42097 Wuppertal, Germany.
Abstract:
A theoretical picture describing the tensile strength σ_{T} of elastomers is developed. σ_{T} is composed of three factors: (1) the tensile strength of individual polymer load-bearing chains (LBCs) according to Eyring's theory, (2) an occupation number of LBC states using Fermi statistics, and (3) an excluded volume factor reducing the number of possible LBCs due to the presence of filler particles or crosslinks between polymers. This description is compared to experimental tensile strengths of carbon black (N339)-filled EPDM (Keltan 4450) as well as to other experiments in the literature studying the effects of temperature, filler concentration, and particle size as well as crosslink density.
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