Understanding the Molecular Dynamics of Dual Crosslinked Networks by Dielectric Spectroscopy.

ABSTRACT: The combination of vulcanizing agents is an adequate strategy to develop multiple networks that consolidate the best of different systems. In this research, sulfur (S), and zinc oxide ( ZnO) were combined as vulcanizing agents in a matrix of carboxylated nitrile rubber (XNBR). The resulting dual network improved the abrasion resistance of up to ~15% compared to a pure ionically crosslinked network, and up to ~115% compared to a pure sulfur-based covalent network. Additionally, the already good chemical resistance of XNBR in non-polar fluids, such as toluene and gasoline, was further improved with a reduction of up to ~26% of the solvent uptake. A comprehensive study of the molecular dynamics was performed by means of broadband dielectric spectroscopy (BDS) to complete the existing knowledg

SUBMITTER: Utrera-Barrios S 

PROVIDER: S-EPMC8512226 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature