Determination of the crosslink density of tire tread compounds by different analytical methods

Anke Blume*, Jens Kiesewetter

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The crosslink density of rubber compounds influences the in-rubber properties of the final product to a great extent. There are several analytical methods available to determine this crosslink density like equilibrium swelling experiments, Temperature Scanning Stress Relaxation (TSSR) measurements, thiol-amine-method, 1H NMR relaxation, stress-strain analysis according to Mooney-Rivlin or to a non-Gaussian tube model of rubber elasticity (dynamic flocculation model, DFM). SSBR/BR model compounds filled with a Silica/Silane system were produced with varying amounts of accelerator and sulfur and investigated with these different analytical methods. The evaluation shows that methods like DFM, TSSR and Mooney-Rivlin correlate very well but that the thiol-amine method is unsuitable for these silica-filled compounds.

Original languageEnglish
Pages (from-to)33-42
Number of pages10
JournalKGK Kautschuk Gummi Kunststoffe
Volume72
Issue number9
Publication statusPublished - Sep 2019
Externally publishedYes

Keywords

  • H NMR relaxation
  • Crosslink density
  • DFM
  • Mooney-Rivlin
  • Swelling
  • Thiol-amine-method
  • TSSR

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