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A review of the rheo-optical properties of linear high polymers

Paper covers the essential mechanical and optical properties of high polymers in order to clarify important features useful in applications

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Abstract

Some principles ans laws, expressing the mechanical and optical behavior of linear viscoelastic materials, are reviewed. The mechanical properties of the polymers in the transition region may be represented by a condensed general method containing Ferry's modulus or compliance-reduction scheme, the time-temperature superposition principle and the Gauss error integral representation. The optical behavior of high polymers is expressed by the stress- and strain-optical coefficients in creep or relaxation, which relate birefringence to stresses or strains.

It was recently shown experimentally that, instead of a pair of independent linear differential operator relations, which characterize the mechanical properties of the viscoelastic materials, only one operator relation is needed and the initial value of another at the glassy or rubbery state. Then, a single test is sufficient for the complete determination of the mechanical and optical viscoelastic behavior, provided the value of another elastic constant at the glassy or rubbery state is also determined and the variation of birefringence with time is simultaneously measured with the mechanical-characteristic quantities of the material.

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Authors and Affiliations

  1. Department of Engineering Mechanics, the Pennsylvania State University, University Park, Pa.

    Pericles S. Theocaris (Visiting Professor)

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  1. Pericles S. Theocaris
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Theocaris, P.S. A review of the rheo-optical properties of linear high polymers. Experimental Mechanics 5, 105–114 (1965). https://doi.org/10.1007/BF02323947

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