Premium
Hydrogen Bonding in Polyurethane‐Silica Nanocomposites
Author(s) -
Bistričić Lahorija,
Baranović Goran,
Leskovac Mirela,
Bajsić Emi Govorčin
Publication year - 2011
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201000141
Subject(s) - nanocomposite , materials science , polyurethane , hydrogen bond , fourier transform infrared spectroscopy , elongation , composite material , polymer , hydrogen , dichroic glass , composite number , polymer chemistry , chemical engineering , molecule , ultimate tensile strength , nanotechnology , organic chemistry , chemistry , engineering
Thin films of polyester‐based polyurethane‐silica nanocomposites with 34% hard segments and different concentrations of nano SiO 2 filler (0, 0.5, 1.0 and 3 vol.%) have been prepared. The hydrogen bonding and orientational behaviour of hard and soft segments were analysed using infrared linear dichroic measurements. The number of hydrogen bonded NH and CO groups and orientation function were calculated from polarized FTIR spectra. The presence of nanosilica slightly increased the number of hydrogen bonded carbonyls. The soft segments in nanocomposite films display increased orientation in comparison to the neat polymer film. The addition of 3% nanosilica significantly reduced elongation at break. The results were compared with hydrogen bonding and orientational behaviour of thin film of polyether‐based silica nanocomposites.