Activation energy 2 Derivatives 2 Glass transition 2 Isomerization 2 Organic compounds 2 Photolysis 2 Polarization 2 Polymers 2 Thermal back-isomerization 2 Viscosity 2 alcohol 2 article 2 isomerism 2 naphthol derivative 2 nitrile 2 oxazine derivative 2 phase transition 2 phenanthroline derivative 2 photolysis 2 poly(ethyl methacrylate) 2 poly(isobutyl methacrylate) 2 poly(methyl methacrylate) 2 polymerization 2 polymethacrylic acid 2 solvent 2 spiro compound 2 spiro(indolenaphthooxazine) 2 spiro(indolephenanthrooxazine) 2 temperature dependence 2 thermal analysis 2