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Thermal expansivity and bulk modulus of polymer composites: Experiment versus theory
Author(s) -
Simha R.,
Papazoglou E.,
Maurer F. H. J.
Publication year - 1989
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.750100604
Subject(s) - materials science , micromechanics , composite material , epoxy , compressibility , polymer , thermal , modulus , filler (materials) , thermodynamics , matrix (chemical analysis) , composite number , physics
Correlations between the thermal expansivity, α c , and the compressibility, K c , of particulate‐filled polymer melts are explored in terms of two different theories and in connection with experiments. Both theories employed [an interlayer approach based on micromechanics (IM), and a molecular one starting from the statistical thermodynamics of mixtures (MM)] account for the effect of filler‐matrix interactions, viewed as a system‐dependent parameter. The concentration dependences of α c and K c calculated using either IM or MM agree well with experiments on polyurethane and epoxy composites, and it is possible to predict α c based on K c experimentation. In MM this is always true, but in IM it depends on a knowledge of relations between α and K of the constituents. This point remains to be explored further.