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Molecular morphology in amorphous and glass polymers
Journal of Non-Crystalline Solids 42 (1980) 117 ©North-Holland Publishing Company
MOLECULAR MORPHOLOGY IN AMORPHOUS AND GLASS POLYMERS
P.J. Flory IBN 5600 Cottle Road San Jose, California 95193
Theory advanced many years age predicted that the randomness characteristics of a long polymer chain when isolated from other macromolecules, as in a dilute solution for example, should be preserved in the amorphous state. This prediction is now supported by a large body of evidence, most notably by the results of small angle neutron scattering, which show the correspondence to be quantitative within experimental error in every instance examined to date. The absence of significant perturbations of the molecular configurations in amorphous and glassy polymers seems to suggest total intermolecular disorder. Nevertheless, small angle x-ray scattering demonstrates the prevalence of short-range radial order comparable to that in liquids reveals an enhancement indicative of short-range orientational correlations as well. The degree of correlation is very small, however, and its effect on the molecular configuration may be presumed to be negligible.
117
MOLECULAR MORPHOLOGY IN AMORPHOUS AND GLASS POLYMERS
P.J. Flory IBN 5600 Cottle Road San Jose, California 95193
Theory advanced many years age predicted that the randomness characteristics of a long polymer chain when isolated from other macromolecules, as in a dilute solution for example, should be preserved in the amorphous state. This prediction is now supported by a large body of evidence, most notably by the results of small angle neutron scattering, which show the correspondence to be quantitative within experimental error in every instance examined to date. The absence of significant perturbations of the molecular configurations in amorphous and glassy polymers seems to suggest total intermolecular disorder. Nevertheless, small angle x-ray scattering demonstrates the prevalence of short-range radial order comparable to that in liquids reveals an enhancement indicative of short-range orientational correlations as well. The degree of correlation is very small, however, and its effect on the molecular configuration may be presumed to be negligible.
117