Constitutive equations of ageing polymeric materials |
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Authors: | S T J Peng |
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Affiliation: | (1) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA |
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Abstract: | In a previous paper, a constitutive equation of relaxation behaviour of time-dependent chemically unstable materials has been developed by employing the irreversible thermodynamics of internal variables and Eyring's absolute reaction theory. In that paper, a theoretical expression for the effect of chemical crosslink density,v, on the relaxation rate has been developed. In this paper the creep behaviour of a network polymer undergoing a scission process has been developed. The temperature effect using the WLF equation on the coupled chemomechanical behaviour has also been incorporated into the equation. |
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