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The Vibrational Spectrum of Isotactic Polystyrene II: The Effect of Mass Defects

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Abstract:

Vibrational spectroscopic studies of isotactic styrene copolymers containing mass defects in the form of styrene-d8 units are presented. The results indicate that the changes which occur in the vibrational spectrum of isotactic polystyrene upon the introduction of styrene-d8 defects can be interpreted solely in terms of the delocalization of chain vibrations and the appearance of localized defect modes. Frequency shifts and band broadening observed at low defect concentrations are shown to be consistent with an activation of the density of states of the protonated polymer.

Keywords: Defect modes; Infrared; Normal coordinate calculations; Raman

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702844554116

Affiliations: Polymer Science Section, Department of Materials Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802

Publication date: March 1, 1984

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