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Aging Dynamics in the Polymer Glass of poly(2-chlorostyrene): Dielectric Susceptibility and Volume

Aging Dynamics in the Polymer Glass of poly(2-chlorostyrene): Dielectric Susceptibility and Volume

Koji Fukao, Daisuke Tahara

Phys Rev E Stat Nonlin Soft Matter Phys. 2009 Nov;80(5 Pt 1):051802.

PMID: 20364996

Abstract:

Aging dynamics was investigated in the glassy states of poly(2-chlorostyrene) by measuring the complex electrical capacitance during aging below the glass transition temperature. The variations with time and temperature of the ac dielectric susceptibility and volume could be determined by simply measuring the variation in the complex electrical capacitance. Isothermal aging at a given temperature for several hours after an intermittent stop in constant-rate cooling is stored in the deviations of both the real and imaginary parts of the complex ac dielectric susceptibility and volume. During cooling after isothermal aging, the deviation of the ac dielectric susceptibility from the reference value decreases and almost vanishes at room temperature. By contrast, the deviation in volume induced during isothermal aging remains almost constant during cooling. The simultaneous measurement of ac dielectric susceptibility and volume clearly revealed that the ac dielectric susceptibility exhibits a full rejuvenation effect, whereas the volume does not show any rejuvenation effects. We discuss a plausible model that can reproduce the present experimental results.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP107830524	Poly(2-chlorostyrene)		107830-52-4	Price

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