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The temperature dependence of the doolittle equation parameter for polymer liquids

✍ Scribed by Myung Ho Lee; Do Hung Han; Bongkee Cho

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
277 KB
Volume
50
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

The Doolittle equation parameter for polymer liquids is a function of temperature. Its dependence on temperature can be expressed by a quadratic equation. The constants in the equation are determined for four vinyl-type polymer liquids: polystyrene (PS) , poly (vinyl acetate) ( PVAc), polydimethylsiloxane (PDMS), and polyisobutylene (PIB) .

It was found that the Doolittle parameter decreases with increasing temperature. Equations are presented for the pressure and temperature coefficients of viscosity, isoviscous temperature coefficient of volume, and the constant K,,, in the Miller equation. Comparisons of the predictions of the equations, with those in the literature, are favorable.

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shaped the development of polymer physics. Unfortunately many whom we contacted were unable to contribute, and production constraints gave authors limited time to prepare these notes. We regret not including their voices here. I would like to extend my sincere appreciation to the 14 authors represe