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Monitoring of cure‐induced strain of an epoxy resin by fiber Bragg grating sensor
Author(s) -
Harsch Margit,
KargerKocsis József,
Herzog Florian
Publication year - 2007
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.27096
Subject(s) - materials science , fiber bragg grating , epoxy , composite material , differential scanning calorimetry , glass transition , isothermal process , fiber , strain (injury) , thermal expansion , glass fiber , polymer , optoelectronics , thermodynamics , wavelength , physics , medicine
Abstract In this study, we present a method to detect cure‐induced strain in an epoxy resin (EP) with a Fiber Bragg Grating (FBG) sensor. By embedding the optical fiber into the EP resin the characteristics during isothermal cure (gel point, vitrification) could be precisely detected due to changes in the fiber strain. In a follow up dynamic temperature scan the coefficient of thermal expansion and the glass transition temperature ( T g ) of the fully cured EP were determined by the FBG sensor technique. All results obtained by the fiber optical method showed a very good agreement with those deduced by independent techniques, viz. rheological measurements, differential scanning calorimetry, and thermomechanical analysis. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008