3 years ago

Influence of poly (dihydroxybiphenyl borate) on the curing behaviour and thermal pyrolysis mechanism of phenolic resin

Influence of poly (dihydroxybiphenyl borate) on the curing behaviour and thermal pyrolysis mechanism of phenolic resin
In this study, phenolic resin (PR) that is modified with poly (dihydroxybiphenyl borate) (PDDB) is prepared. The chemical structure, thermal properties and structural evolution at high temperatures for cured PDDB/PR are investigated to understand the reason for high char yields. The results show that the phenylborates that are formed during curing are attributed to the high char yield of PDDB/PR (74%, 800 °C). Phenylborates can block parts of phenolic hydroxyl and effectively inhibit their thermal decomposition reaction. By tracking the resin residue and volatiles that are released during pyrolysis, it is determined that boron oxide and boron carbide are formed via pyrolysis and help reduce carbon loss. Introducing PDDB into PR improves the graphitization degree and graphite crystallites of carbonization products, which promotes the formation of ordered glassy carbon during pyrolysis. Additionally, the CF/PDDB/PR composites show excellent mechanical and ablation properties due to good interfacial adhesion between resin matrix and fibre. This method makes it possible for using PDDB to enhance the thermal properties of the polymer with lower cost, more functions and broader applications.

Publisher URL: www.sciencedirect.com/science

DOI: S0141391017302756

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.