5 years ago

Nonisocyanate polyurethanes from six-membered cyclic carbonates: Catalysis and side reactions

Nonisocyanate polyurethanes from six-membered cyclic carbonates: Catalysis and side reactions
Bao Tran, Kathleen J. Housman, Robert H. Lambeth, Jonathan M. Oyler, MyVan H. Baranoski, Sanyo M. Mathew
We present a detailed investigation of the aminolysis of six-membered cyclic carbonates to form (poly)hydroxyurethanes. Model reactions between hexyl amine and trimethylene carbonate were performed under different conditions where we surveyed the effects of temperature and the presence of catalyst on the rate of reaction. Increased temperatures and the presence of catalyst lead to significant increases in the rate of reaction and overall conversion depending on the structure of the catalyst. Similar observations were also made in model polymerization between a carbonate derivative of di(trimethylolpropane) and diaminopentane. However, the increased rates of reaction and conversion only lead to modest gains in molecular weight. In addition, gelation of the polymerization mixture often occurred as well. Nominal and high-resolution mass spectrometry were used to identify side products that formed during the reaction between trimethylene carbonate and hexyl amine, which explained the gelation of polymerization mixture and lower than expected molecular weights. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44941.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/app.44941

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.