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Time and strain dependent thermal expansion of carbon‐black filled SBR elastomers
Author(s) -
Caruthers J. M.,
Hooley C. J.,
Cohen R. E.
Publication year - 1978
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760180811
Subject(s) - carbon black , materials science , polybutadiene , natural rubber , elastomer , composite material , thermal expansion , thermoelastic damping , thermal , styrene butadiene , polymer , thermodynamics , styrene , physics , copolymer
Length‐temperature measurements were made on unfilled and carbon‐black filled vulcanizates of styrene‐butadiene rubber. As in earlier experiments on polybutadiene, transients in thermal expansion behavior were observed following abrupt changes in the temperature. The nature of this time dependence was not dramatically affected by either the level of equilibrium strain or the structure and loading of the carbon‐black filler. Both the magnitude of the linear coefficient of thermal expansion and the point of thermoelastic inversion were sensitive to the presence of carbon‐black. A model based on considerations of occluded rubber and strain amplification in the free rubbery matrix was used successfully to rationalize the observed behavior of the filled compounds.