title: Renewable non-isocyanate based thermoplastic polyurethanes via polycondensation of dimethyl carbamate monomers with diols.
abstract: 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD)-catalyzed polycondensation reactions of fatty acid derived dimethyl dicarbamates and diols are introduced as a versatile, non-isocyanate route to renewable polyurethanes. The key step for the synthesis of dimethyl carbamate monomers from plant-oil-derived dicarboxylic acids is based on a sustainable base-catalyzed Lossen rearrangement. The formed polyurethanes with molecular weights up to 25 kDa are characterized by SEC, DSC, and NMR analysis.
authors.affiliation: Laboratory of Applied Chemistry, Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany.
authors.forename: Maike
authors.initials: M
authors.lastname: Unverferth
authors.forename: Oliver
authors.initials: O
authors.lastname: Kreye
authors.forename: Alexander
authors.initials: A
authors.lastname: Prohammer
authors.forename: Michael A R
authors.initials: MA
authors.lastname: Meier
mesh_terms: D002219:Carbamates / Q000737:chemistry*; D002384:Catalysis; D003998:Dicarboxylic Acids / Q000737:chemistry; D004951:Esterification; D055772:Green Chemistry Technology; D017953:Isocyanates / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010938:Plant Oils / Q000737:chemistry; D058105:Polymerization; D011140:Polyurethanes / Q000737:chemistry*
chemical_list: D002219:Carbamates; D003998:Dicarboxylic Acids; D017953:Isocyanates; D010938:Plant Oils; D011140:Polyurethanes
keywords: fatty acids; non-isocyanate polyurethanes; polycondensation; polyurethanes; renewable resources