The microstructure of (S)-4-methyl-1-hexene-styrene copolymer [55206-50-3] prepd. in the presence of a Ziegler-Natta catalyst was detd. by 13C NMR. Owing to heterogeneity, fractions extd. by boiling solvents were also studied. Those sol. in Et2O, cyclohexane, and CHCl3 were highly isotactic. Computer anal. of spectra showed these fractions to contain long segments of 1 monomer linked by isolated units of the other. Fractions sol. in EtOAc had lower tacticity and a quasi-random monomer distribution. The mechanism of polymn. is discussed.
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Segre et al. (1985) studied this question.
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