Physical aging and refractive index of poly(methyl methacrylate) glass
Physical aging and refractive index of poly(methyl methacrylate) glass
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DOI：
10.1295/polymj.pj2005192
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发表时间：
2006-01-01
期刊：
影响因子：
2.8
通讯作者：
Nakanishi, Teruaki
中科院分区：
文献类型：
--
作者：
Tanio, Norihisa;Nakanishi, Teruaki
用折射率法研究了聚甲基丙烯酸甲酯(PMMA)玻璃的物理老化。通过光学棱镜耦合测量了PMMA玻璃在低于玻璃化转变温度(T-g)时的折射率随退火温度的变化，并用Lorentz-Lorenz方程测定了物理老化引起的体积弛豫。研究了老化温度对PMMA玻璃体积松弛的影响。PMMA玻璃的最大体积松弛是在低于T-g的18℃下确定的。
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 (T-g) 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 degrees C below the T-g.