Studies of acoustic relaxation have been made on dilute solutions of three tactic forms of poly(methyl methacrylate) and two of poly(α-methylstyrene). The relaxation dynamics vary markedly with stereo-form, and the conformational energetics compare well with “flex-energies” derived from statistical mechanical theories of the glass transition.
J. H. Dunbar, A. M. North, R. A. Pethrick and D. B. Steinhauer, J. Chem. Soc., Faraday Trans. 2, 1975, 71, 1478 DOI: 10.1039/F29757101478
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