Abstract
Free volume distribution of poly (methyl methacrylate) and their alkyl ester derivatives was determined with photo-reactive probe techniques. With azobenzene as the photochromic probe, fairly large part of the free volume in PMMA is found to be the more reactive cavity than the reaction in solution, while there is some fraction of free volume whose quantum of the photoreaction is zero. With the increase in the alkyl chain length, increase in the average free volume is observed. The average free volume becomes smaller for blanched alkyl esters due to occupation by the dangling chain. Inclusion complex with β-cyclodexistrin makes the free volume distribution monodispersely, while the distribution is wide with g-cyclodextrin inclusion complex.
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