Abstract
Physical aging of poly(methyl methacrylate) (PMMA) glass was studied by refractive index measurement. We measured change of refractive index of PMMA glass with annealing at temperatures below the glass transition temperature (Tg) by optical prism coupling, and determined volume relaxation by physical aging using the Lorentz-Lorenz equation. In this paper, the effect of aging temperature on volume relaxation of PMMA glass was investigated. Maximum volume relaxation for PMMA glass was determined at 18 °C below the Tg.
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Tanio, N., Nakanishi, T. Physical Aging and Refractive Index of Poly(methyl methacrylate) Glass. Polym J 38, 814–818 (2006). https://doi.org/10.1295/polymj.PJ2005192
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DOI: https://doi.org/10.1295/polymj.PJ2005192
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