The far-infra-red spectra of crystalline
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D.R. Beckett; J.M. Chalmers; M.W. Mackenzie; H.A. Willis; H.G.M. Edwards; J.S. L
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Article
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1985
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Elsevier Science
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English
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Far-ix. spectra of crystalline isotactic polypropylene (IPP) in its various polymorphic forms have been recorded over the range 500-100 cm-'. Differences in the spectra, in particular the splitting of certain A line-group modes, reflect the environments of isolated IPP chains within the particular u