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

Paul A. O'Connell; Gregory B. McKenna

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

Paul A. O'Connell, Gregory B. McKenna

Chemical Engineering

Research output: Contribution to conference › Paper › peer-review

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 T_g-17 °C to T_g+3 °C where T_g is the nominal glass transition temperature. The equilibration times ranged from less than 30 minutes near to T_g 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 a_T was found to deviate significantly from that expected from either `universal' WLF behavior or from extrapolation of literature data obtained above T_g for polycarbonate.

Original language	English
Pages	2152-2155
Number of pages	4
State	Published - 1998
Event	Proceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3) - Atlanta, GA, USA Duration: Apr 26 1998 → Apr 30 1998

Conference

Conference	Proceedings of the 1998 56th Annual Technical Conference, ANTEC. Part 1 (of 3)
City	Atlanta, GA, USA
Period	04/26/98 → 04/30/98

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title = "Temperature shift factors for the segmental relaxation of polycarbonate below the glass transition",

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.",

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AU - O'Connell, Paul A.

AU - McKenna, Gregory B.

PY - 1998

Y1 - 1998

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AB - 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.

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M3 - Paper

AN - SCOPUS:0031676519

SP - 2152

EP - 2155

Y2 - 26 April 1998 through 30 April 1998

ER -

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

Abstract

Conference

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