This study tested the hypothesis of a non-uniform size distribution of free volume by photoisomerizing photochromic probes in atactic polystyrene films. To determine the maximum amount that free volume would decrease from a reduction in expansion free volume of the glass at a temperature below its T//g, the study also found the equilibrium specific volume of polystyrene below its T//g by measuring the partial volume of polystyrene in athermal solvents.
|Original language||English (US)|
|Title of host publication||Polymeric Materials Science and Engineering, Proceedings of the ACS Division of Polymeric Material|
|Number of pages||5|
|State||Published - Jan 1 1986|
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