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dc.creatorLipschitz, I.en_US
dc.creatorGray, J. M.en_US
dc.date.accessioned2006-06-15T14:12:39Z
dc.date.available2006-06-15T14:12:39Z
dc.date.issued1979en_US
dc.identifier1979-RC-04en_US
dc.identifier.urihttp://hdl.handle.net/1811/10877
dc.descriptionAuthor Institution:en_US
dc.description.abstractThe vibrational spectra of syndiotactic and isotactic poly (methylmethacrylate) (PMMA) show distinct differences especially in the region from $1000 cm^{-1}$ to $1500 cm^{-1}$. The band at $1070 cm^{-1}$ is found in syndiotactic PMMA polymers, but appears to vanish in isotactic PMMA polymers. In order to understand the causes of these differences the normal coordinate analysis of several dimer unite was undertaken. These dimer units had different conformations and could be considered isotactic dyads and syndiotactic dyads. From the potential energy matrix the contribution of each internal mode to a vibrational frequency was discerned and changes in the frequency correlated with the particular conformers farming the dimer unit. The symmetry coordinates were used to assign the frequency and type of vibration.en_US
dc.format.extent75017 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleNORMAL COORDINATE ANALYSIS OF THE DIMER UNIT OF POLY (METHYLMETHACRYLATE)en_US
dc.typearticleen_US


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