Methyl-Group Tunneling in Viscoelastic Relaxation: Experimental Verification
- 6 October 1975
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 35 (14) , 951-953
- https://doi.org/10.1103/physrevlett.35.951
Abstract
A relation between methyl-group tunneling and viscoelastic relaxation has been found in dynamic mechanical studies of the backbone methyl relaxation in polymethyl methacrylate (PMMA). The pronounced curvature found in the plot of versus for the methyl relaxations at low temperatures and the observed large isotope effect for fully deuterated PMMA are in qualitative agreement with tunneling theory.
Keywords
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