European Polymer Journal
European Polymer Journal
5 years ago

Catalytic effect of ZnO anchored silica nanoparticles on rubber vulcanization and cross-link formation

Catalytic effect of ZnO anchored silica nanoparticles on rubber vulcanization and cross-link formation
ZnO nanoparticles (NPs) anchored on SiO2 (ZnO/SiO2) demonstrated to be an activator of higher efficiency in the sulfur crosslinking of isoprene rubber (IR) in comparison with conventional microcrystalline ZnO. The better performance of this innovative catalytic filler has been associated with: (i) the faster Zn reaction with stearic acid and curatives, to form the sulfurating complexes at the beginning of the curing process; (ii) the faster formation of large amounts of mono- and di- sulfide cross-linking short chains through a breaking-down mechanism of longer poly-sulfide chains, which account for the higher cross-linking density of the final cured material. In the first step of the curing reaction activated by ZnO/SiO2, the formation of a stearate bridged dimeric zinc complex has been suggested as potential highly reactive intermediate responsible for accelerating the cross-linking reaction.

Publisher URL: www.sciencedirect.com/science

DOI: S0014305716317530

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.