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Spectroscopic studies of the gradient in the silane coupling agent/matrix interface in fiberglass‐reinforced epoxy
Author(s) -
Hoh K.P.,
Ishida H.,
Koenig J. L.
Publication year - 1988
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750090209
Subject(s) - epoxy , silane , materials science , composite material , differential scanning calorimetry , interphase , penetration (warfare) , silanes , hydrolysis , fourier transform infrared spectroscopy , chemical engineering , organic chemistry , chemistry , physics , operations research , biology , engineering , genetics , thermodynamics
Differential scanning calorimetry, Fourier transform infrared, and solid‐state carbon 13 nuclear magnetic resonance were used to study the silane coupling agent/epoxy resin interface. Penetration of epoxy into the hydrolyzed silane has been shown. The addition of a solvent can further increase the penetration of epoxy into the hydrolyzed silane by decreasing the viscosity of the epoxy. Bulk models of the gradient in the silane coupling agent/epoxy interface have shown that the concentration of silane and the degree of hydrolysis of the silane can determine the rigidity or mobility of the interphase region. When the silane is hydrolyzed, the possible formation of entanglements may increase the rigidity of the system and decrease the degree of phase separation through the formation of an interpenetrating network.