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Enthalpic retardation times of annealed polystyrene

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1 Author(s)
OReilly, J.M. ; Webster Research Center, Xerox Corporation, Rochester, New York 14644

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An equation for the retardation time for enthalpy recovery has been tested for polystyrene as a function of heating rate, temperature, and initial displacement. The temperature dependence ϑ and displacement dependence ξ of the retardation time are determined from the data assuming a single relaxation time. The fraction of the temperature dependence of the retardation time due to structure (1-X) and due purely to temperature (X) are calculated and compared with results for other polymers. Some factors which can affect X are discussed.

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Journal of Applied Physics  (Volume:50 ,  Issue: 10 )