Abstract
Storage (G′) and loss (G″) moduli were measured for dilute solutions of polystyrene (PS) and poly(α-methylstyrene) (PMS) in Aroclor (chlorinated diphenyl) with the modified Birnboim transducer. The molecular weights (M) were 5.1×104, 8.2×104, and 2.67×105 for PS and 3.55×105 and 8.7×105 for PMS, and the ranges of concentration (c) were 1.5×10−2 to 7.6×10−2 g/ml for PS and 1.5×10−2 to 4.6×10−2 for PMS, respectively. The solvent viscosity ηs varied from 5000 to 9.3 poise over the temperature range of 10 to 35°C employed. The frequency range was 0.02 to 630 Hz. The limiting value of the dynamic viscosity at high frequency η∞′ is described by an equation ln(η∞′/ηs)=[η′]∞c over the whole range of concentration, where [η′]∞ is a constant independent of M and is 14.3 and 22.2 ml/g for PS and PMS, respectively. The limiting value of G′ at high frequency is approximately proportional to c. The time–temperature reduction rule was successfully applied to G′ and G″−ωηs and the shapes of frequency dependence curves of the reduced moduli were described well by the theory of Peterlin.
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Osaki, K., Schrag, J. Viscoelastk Properties of Polymer Solutions in High-Viscosity Solvents and Limiting High-Frequency Behavior. I. Polystyrene and Poly(α-methylstyreste). Polym J 2, 541–549 (1971). https://doi.org/10.1295/polymj.2.541
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DOI: https://doi.org/10.1295/polymj.2.541
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