The structure of initial, ultimate and inner chain units in polybutadiene produced with NdCIa. 3 (i-PrOH)-HAI (i-Bu)2 was studied by means of 13C nuclear magnetic resonance spectroscopy. Initial units are shown to be predominantly of trans-CHaCH=CHCH2- structure. Conversely, 90% of inner units have ?is configuration. Ultimate units obtained by quenching with H20 (D20) are predominantly of 1,2 structure. On the basis of the data obtained, the polymerization mechanism was discussed.
Посилання на статтю:
Structure of initial, ultimate and inner chain units of polybutadiene obtained with a rare-earth catalyst as revealed by 13C nuclear magnetic resonance spectroscopy / K. D. Skuratov, M. I. Lobach*, A. N. Shibaeva, L. A. Churlyaeva,T. V. Erokhina, L. V. Osetrova and V. A. Kormer // Polymer. – 1992. – Vol 33. – P. 5202-5207.