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Nonisocyanate thermoplastic polyurethane elastomers based on poly(ethylene glycol) prepared through the transurethanization approach
Author(s) -
Kébir Nasreddine,
Nouigues Soumaya,
Moranne Pierre,
Burel Fabrice
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.44991
Subject(s) - polyurethane , glass transition , thermoplastic polyurethane , materials science , polymer chemistry , thermoplastic elastomer , elastomer , ethylene glycol , polymer , catalysis , butanediol , thermoplastic , copolymer , chemistry , composite material , organic chemistry , fermentation
Nonisocyanate thermoplastic polyurethane elastomers (NIPUs) were synthesized with the transurethanization approach. Dimethyl dicarbamates (DCs) were prepared by the reaction of a diamine with an excess of dimethyl carbonate in the presence of 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (TBD) as a catalyst. Then, the polymers were obtained under neat conditions through the reaction of DC with polyethyleneglycol of average molecular weight of 1500 g/mol (PEG1500) at variable temperatures in the presence of different amounts of 1,4‐butanediol. TBD, dibutyltin dilaurate (DBTL), and K 2 CO 3 were tested as catalysts. TBD and DBTL seemed to be more efficient than K 2 CO 3 in the temperature range 140–160 °C. The obtained materials exhibited molecular weight values ( M w ) up to 10,000 g/mol and thermal stabilities above 200 °C. The soft segments displayed glass‐transition temperature values that varied from −49 to −1 °C and melting temperature values that varied from 38 to 49 °C. Compared to polyurethane analogs, the NIPUs exhibited higher crystallinities and thermal stabilities. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44991.