Jump to main content
Jump to site search

Issue 96, 2014
Previous Article Next Article

Original biobased nonisocyanate polyurethanes: solvent- and catalyst-free synthesis, thermal properties and rheological behaviour

Author affiliations

Abstract

Novel biobased NonIsocyanate PolyUrethanes (NIPUs) were synthesized from dimer-based diamines and sebacic biscyclocarbonate in bulk, and without catalyst. All synthesized NIPUs present biobased contents around 80%. Biscyclocarbonates and final NIPUs were characterized by FTIR and NMR spectroscopy. A specific study was conducted to determine the best carbonate to amine ratio. The influence on the structures and properties of NIPUs with different average amine functionalities, varying from 2.0 to 2.2, was investigated by DSC, SEC and dynamic rheological analyses. Based on FTIR analyses, it was found that the stoichiometric ratio is optimal for the NIPU synthesis to obtain the highest molar masses with appropriate kinetics. However, the results show that the molar masses (up to 22 000 g mol−1) were lower than conventional polyurethanes. A specific structuration due to a higher crosslink degree was observed when the average functionality of the diamine dimer increased. As expected, the glass transition temperature rises in this case. Crosslinked samples were synthesized with an average amine functionality of 2.15 and 2.2. A promising elastomer sample with elongation higher than 600% was then obtained.

Graphical abstract: Original biobased nonisocyanate polyurethanes: solvent- and catalyst-free synthesis, thermal properties and rheological behaviour

Back to tab navigation

Supplementary files

Publication details

The article was received on 04 Sep 2014, accepted on 16 Oct 2014 and first published on 16 Oct 2014


Article type: Paper
DOI: 10.1039/C4RA09794G
Citation: RSC Adv., 2014,4, 54018-54025
  •   Request permissions

    Original biobased nonisocyanate polyurethanes: solvent- and catalyst-free synthesis, thermal properties and rheological behaviour

    C. Carré, L. Bonnet and L. Avérous, RSC Adv., 2014, 4, 54018
    DOI: 10.1039/C4RA09794G

Search articles by author

Spotlight

Advertisements