European Polymer Journal
European Polymer Journal
5 years ago

A perfluoropolyether-based elastomers library with on-demand thermorheological features

A perfluoropolyether-based elastomers library with on-demand thermorheological features
Perfluoropolyether (PFPE)-based materials were obtained through thermal 1,3-dipolar Huisgen reactions. The formulations consisted in a combination of PFPE-functionalized oligomers (PFPE-diyne A2 and PFPE-diazide B2) and a pentaerythritol triazide cross-linker C3. Increasing the amount of C3 induced an increase of the cross-link density. This approach gave rise to materials ranging from rubber-like to gels. The networks formation was found to be governed by a constant activation energy and it was assumed that the whole process is controlled by the fast reaction between A2 and C3. Two glass transition temperatures were evidenced, one ascribed to hydrogen bonds that gradually shifted to a lower temperature with decreasing C3, while the other one was attributed to PFPE segments that constantly appeared at -−105°C. Thermogravimetric analyses under air recorded at a low heating rate of 1°Cmin−1 provided a valid estimate of the true temperature of degradation of the materials (ca. 200°C).

Publisher URL: www.sciencedirect.com/science

DOI: S0014305717309734

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.