Abstract
Volume relaxation in a-PMMA and a-PMMA/PEO amorphous blends was investigated by employing a mercury-in-glass dilatometer after a temperature down-jump from equilibrium above glass transition temperature, Tg, to an aging temperature below Tg. From volume contraction isotherms, volume relaxation rate, βv = −1/V(dV / dlogt), was determined as a parameter quantifying the rate of volume changes, where V is the volume and t the aging time. The addition of PEO into blends has been found to considerably increase βv.
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Slobodian, P., Lengálová, A. & Sáha, P. Volume Relaxation Rate in a-PMMA and a-PMMA/PEO Amorphous Blends. Polym J 36, 176–181 (2004). https://doi.org/10.1295/polymj.36.176
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DOI: https://doi.org/10.1295/polymj.36.176
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