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Material characterization for flow modeling in structural reaction injection molding
Author(s) -
Chick J. P.,
Rudd C. D.,
Van Leeuwen P. A.,
Frenay T. I.
Publication year - 1996
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.10597
Subject(s) - materials science , wetting , composite material , molding (decorative) , viscosity , transfer molding , epoxy , contact angle , composite number , flow (mathematics) , mold , mechanics , physics
To support mold filling studies in liquid composite molding, a chemorheological model has been developed that describes the viscosity of an amine‐cured epoxy resin of the type used in structural RIM. The model predictions are compared with results from Monte Carlo network simulations and DSC data. The viscosity model is then used to estimate the principal in‐plane permeabilities of fiber reinforcements using data taken directly from an SRIM process. The experimental method, based on a radial solution to Darcy's law, yields both the wetting and wetted permeabilities. The method has been demonstrated for two plane random reinforcements and indicates negligible difference between wetted and wetting permeabilities at the flow rates considered. The results compare favorably with existing data from radial and rectilinear flow bench rigs.