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Synthesis and characterization of elastomeric, biobased, nonisocyanate polyurethane from natural rubber
Author(s) -
Jaratrotkamjorn Ruedee,
Nourry Arnaud,
Pasetto Pamela,
Choppé Emilie,
Panwiriyarat Wannarat,
Tanrattanakul Varaporn,
Pilard JeanFrançois
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45427
Subject(s) - thermogravimetric analysis , polymer chemistry , natural rubber , reactivity (psychology) , polyurethane , telechelic polymer , differential scanning calorimetry , carbonate , elastomer , fourier transform infrared spectroscopy , chemistry , solvent , molar mass , materials science , organic chemistry , chemical engineering , end group , copolymer , polymer , medicine , physics , alternative medicine , pathology , engineering , thermodynamics
Linear and crosslinked polyhydroxyurethanes (PHUs) based on natural rubber (NR) were synthesized by a polyaddition reaction without a solvent or catalyst to exploit the reactivity of diamines or triamines with dicyclic carbonate groups. Oligo‐isoprenes were obtained from the controlled oxidative degradation of NR and successive modifications of the chain ends. The syntheses of linear PHU were carried out with two approaches. The first one consisted of a reaction between amino telechelic oligo‐isoprenes and aromatic or aliphatic dicyclic carbonates. The second approach proceeded through a reaction between oligo‐isoprenes bearing cyclic carbonate chain ends and difunctional or trifunctional amines. The evolution of these reactions was studied by Fourier transform infrared spectrometry. The influence of the carbonate‐to‐amine molar ratio, the chain length of the oligo‐isoprenes, and the reaction temperatures were investigated. The thermal properties of the PHUs were studied by differential scanning calorimetry and thermogravimetric analysis. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45427.