Abstract

Large differential line broadening (DLB) of the individual components of 13 -C 1 H coupled multiplets were observed in 13 C MAS NMR spectra of solid poly(cis-butadiene), poly(cis-isoprene), poly(cis,trans-butadiene), butadien-styrene and acrylonitrile-butadiene-styrene block polymers, and poly(trans-isoprene). DLB of olefine methine carbons is manifest as broadening of the high-field doublet component in poly(cis-butadiene) and poly(cis-isoprene), while in trans segments in poly(cis-trans-butadiene) and in poly(trans-isoprene) the low-field component broadens first, on cooling

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