Temperature shift factors for the segmental relaxation of polycarbonate below the glass transition

Paul A. O'Connell, Gregory B. McKenna

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2 Scopus citations

Abstract

Data are presented on the stress relaxation response of a polycarbonate under torsional load. Tests were performed for times long enough to attain the equilibrium viscoelastic response at temperatures from approximately Tg-17 °C to Tg+3 °C where Tg is the nominal glass transition temperature. The equilibration times ranged from less than 30 minutes near to Tg to twelve days at the lowest temperature. Time-temperature superposition was found to be applicable over the entire temperature range investigated. The temperature dependence of the logarithm of the temperature shift factors aT was found to deviate significantly from that expected from either `universal' WLF behavior or from extrapolation of literature data obtained above Tg for polycarbonate.

Original languageEnglish
Pages2152-2155
Number of pages4
StatePublished - 1998
EventProceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3) - Atlanta, GA, USA
Duration: Apr 26 1998 → Apr 30 1998

Conference

ConferenceProceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3)
CityAtlanta, GA, USA
Period04/26/98 → 04/30/98

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    O'Connell, P. A., & McKenna, G. B. (1998). Temperature shift factors for the segmental relaxation of polycarbonate below the glass transition. 2152-2155. Paper presented at Proceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3), Atlanta, GA, USA, .