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Polyurethane elastomers from tdi and castor oil
Author(s) -
Cuadrado T. R.,
Williams R. J. J.
Publication year - 1986
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19860020108
Subject(s) - toluene diisocyanate , polyurethane , elastomer , castor oil , toluene , benzene , materials science , swelling , glass transition , stoichiometry , characterization (materials science) , fraction (chemistry) , polymer chemistry , chemical engineering , composite material , chemistry , organic chemistry , polymer , nanotechnology , engineering
Polyurethane elastomers were prepared by reacting castor oil with toluene diisocyanate (TDI) in pure (80:20) and crude (TDI R) grades. Different elastomers were prepared by using several stoichiometric imbalances, always in defect of NCO groups. Their characterization involved the determination of the glass transition temperature (TMA), the sol fraction (extraction with toluene) and the concentration of elastically active network chains (swelling in benzene). Experimental results were compared with theoretical predictions resulting from a statistical model of the network formation.