Fourier transform infrared spectroscopy of the polymorphic forms of syndiotactic polystyrene

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Abstract
Infrared spectra of syndiotactic polystyrene exhibiting various crystalline forms and modifications, and in the amorphous state, are reported in this contribution. In addition to strong conformational effects, the spectra demonstrate striking effects of chain packing. Several infrared spectral differences also exist between the two crystalline forms which present a trans‐planer conformation of the chains. Spectral changes are also reported for solution‐crystallized samples, which depend on the solvent present in the clathrate compound formed with the polymers.