Influence of Modified Epoxy Resins on Peroxide Curing, Mechanical Properties and Adhesion of SBR, NBR and XNBR to Silver Wires. Part I: Application of Monoperoxy Derivative of Epoxy Resin (PO)

Joanna Chudzik,Marcin Jędrzejczyk,Yuriy Demchuk,Dariusz M Bieliński,Michael Bratychak,Olena Astakhova,Grzegorz Celichowski

doi:10.3390/ma14051320

Joanna Chudzik, Marcin Jędrzejczyk + Show 5 more

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https://doi.org/10.3390/ma14051320

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Abstract

The research was aimed at checking the effect of monoperoxy derivative of epoxy resin (PO) on the possibility of rubber crosslinking and a subsequent adhesion of the modified rubber to silver wires. Three of the commonly industrially used rubbers were selected for the study: styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR) and carboxylated acrylonitrile-butadiene rubber (XNBR), together with the popular, commercially available Epidian 6 epoxy resin, subjected to the functionalization. An improvement in the adhesion of rubbers to silver wires was observed when using the modified resin. In some cases, an improvement in the mechanical properties of the rubber was observed, especially when the resin was used for crosslinking together with dicumyl peroxide (DCP). Crosslinking synergy between dicumyl peroxide and the modified resin could be observed especially in the case of PO applied for peroxide curing of SBR and NBR.

Highlights

Nowadays, it has become necessary to use more and more advanced polymer composites in order to meet increasingly demanding applications
Modifying rubbers by a resin addition we consider it advisable to check how this will affect the vulcanization parameters. They are not directly related to the adhesion of the rubbers to silver, but if the addition of peroxide group (PO) makes the crosslink density of the rubber high enough, it can be responsible for very weak adhesion to silver due to the different thermal shrinkage of the metal and the rubber after vulcanization
The analysis of the rheometric curves confirms the limited ability of the modified PO resin to crosslink the tested rubbers on its own

Summary

Introduction

It has become necessary to use more and more advanced polymer composites in order to meet increasingly demanding applications. Silver nanowires (AgNW) are one of the promising materials that may ensure electrical conductivity and bioactivity of rubber products and further enhancement of their mechanical properties [3]. Their introduction into the rubber matrix makes possible to create effective load sensors based on changes in the electrical conductivity of the composites [4]. Zinc plated steel cords were treated with an RF plasma polymerization coating of acetylene or butadiene in order to enhance adhesion to the rubber compounds [11,12]. Another method involved the thermal evaporation of PPS to form a buffer layer on Cu, followed by plasma treatment with reactive gases such as O2 , H2 , and N2 on the PPS buffer layer

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