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.
Optically-active hydrocarbon polymers with aromatic side-chains .13. Structural-analysis of (S)-4-methyl-1-hexene styrene copolymers by C-13 NMR-Spectroscopy / A. L., Segre; Delfini, Maurizio; M., Paci; A. M., Raspolligalletti; R., Solaro. - In: MACROMOLECULES. - ISSN 0024-9297. - STAMPA. - 18:1(1985), pp. 44-48. [10.1021/ma00143a006]
Optically-active hydrocarbon polymers with aromatic side-chains .13. Structural-analysis of (S)-4-methyl-1-hexene styrene copolymers by C-13 NMR-Spectroscopy
DELFINI, Maurizio;
1985
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
