Summary
Raman spectroscopy was used to study the transfer of energy that occurs among the internal vibrations of crystalline isotactic polypropylene as it is compressed. The \({\text{C}}--\mathop {\mathop {\text{C}}\limits_| --C}\limits_{{\text{CH}}_{\text{3}} }\) group was found to play a significant role in the subsequent chain deformation.
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Ize-Iyamu, M.I. Raman study of chain deformation in polypropylene. Polymer Bulletin 12, 487–490 (1984). https://doi.org/10.1007/BF00255439
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DOI: https://doi.org/10.1007/BF00255439