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Experimental determination of thermal and adhesion stress in particle filled thermoplasts
Author(s) -
Vollenberg Peter,
Heikens D.,
Ladan H. C. B.
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.750090603
Subject(s) - dewetting , materials science , composite material , stress (linguistics) , particle (ecology) , adhesion , radius , shear stress , stress–strain curve , deformation (meteorology) , wetting , philosophy , linguistics , oceanography , computer security , computer science , geology
The phenomena of dewetting in filled thermoplastics were studied by light microscopy and were correlated with variations in the slope of stress‐strain diagrams in constant strain rate tests. In such diagrams, kinks in the plots were found to correspond to the dewetting stress. The corresponding local stress at a filler particle is then equal to the sum of the thermal compressive stress and the adhesion stress. It was shown that the adhesion stress was proportional to the reciprocal root of the particle radius. Also, values of dewetting stress predicted for inorganic particles with radii smaller than 2–4 micrometers are higher than the stresses at which crazes and shear‐bands are formed near such particles, indicating that dewetting will not occur in those cases, and adhesion aids may be superfluous.