Abstract

The local molecular dynamics and morphology of poly(ethylene glycol) dimethacrylate networks synthesized in the presence of 0–40% branched poly(methyl methacrylate) were studied using a photochromic probe (6-nitrospiropyran). The change in the free volume of the polymer in the vicinity of the photochromic probe was monitored by the rate of dark bleaching of merocyanine (colored form of 6-nitrospiropyran). The local free volume and the mobility of the polymer chain fragments decrease as the conversion of C=C bonds and the content of branched poly(methyl methacrylate) in the polymer increase.

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