Effect of annealing below the glass tran
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G. Titomanlio; F.P. La Mantia
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Article
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1980
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Elsevier Science
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Many properties of glassy polymers undergo significant changes upon annealing 1. These changes which may be reversed with a brief heating to above the glass transition temperature, have,been related to enthalpy and/or free volume relaxation. As both enthalpy and free volume tend either increase or