13C n.m.r. study of optically active polymers: poly(4-methyl-1-hexene) |
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| Authors: | F. Conti L. Acquaviva E. Chiellini F. Ciardelli M. Delfini A.L. Segre |
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| Affiliation: | Istituto di Chimica Fisica, Università di Roma, Rome, Italy;Centro di Studio del CNR per le Macromolecole Stereoordinate ed Otticamente Attive, Istituto di Chimica Organica Industriale, Università di Pisa, Pisa, Italy;Laboratorio di Chimica e Tecnologia dei Radioelementi, CNR, Padova, Italy |
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| Abstract: | Isotactic polymers of optically active and racemic 4-methyl-1-hexene, obtained by polymerization with Ziegler—Natta catalysts, were studied by 13C n.m.r. Polymer fractions with different stereoregularity and molecular weight, derived from the monomer with high optical purity, show in their 13C n.m.r. spectra differences which are tentatively associated with possible conformation effects. Stereoselectivity is observed in polymers obtained from the racemic monomer. |
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