Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research
5 years ago

Design and Synthesis of Efficient Phosphorus Flame Retardant for Polycarbonate

Design and Synthesis of Efficient Phosphorus Flame Retardant for Polycarbonate
Chuanchuan Liu, Qiang Yao
Phosphorus flame retardants have been considered to be ineffective for polycarbonates (PCs). In light of the recognition that the high efficiency of sulfonate salts is due to the base catalyzed decomposition of polycarbonate, a tertiary amine group is incorporated into a 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) derivative which was synthesized from DOPO, paraformaldehyde, and piperazine (DFPZ). DFPZ shows excellent flame retardancy and enables PC to achieve a UL-94 V0 rating at only 3%. In contrast, despite the close similarities in the structures, DPZ with a direct P–N bond synthesized from DOPO and piperazine is much less effective. It requires 10% of DPZ for PC to gain a UL-94 V0 rating. On the basis of the study of diphenyl carbonate/flame retardants and the results of thermogravimetric analysis, Fourier transform infrared analysis, inductively coupled plasma analysis, and morphology of PC/flame retardants, the base catalyzed decomposition of PC that leads to severe dripping is the key factor for the high efficiency of DFPZ.

Publisher URL: http://dx.doi.org/10.1021/acs.iecr.7b01915

DOI: 10.1021/acs.iecr.7b01915

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.