Structure of initial, ultimate and inner chain units of polybutadiene obtained with a rare-earth catalyst as revealed by 13C nuclear magnetic resonance spectroscopy

Autor:	M.I. Lobach, K.D. Skuratov, L. A. Churlyaeva, L.V. Osetrova, A.N. Shibaeva, V.A. Kormer, T.V. Erokhina
Rok vydání:	1992
Předmět:	Reaction mechanism Quenching (fluorescence) Polymers and Plastics Chemistry Organic Chemistry Nuclear magnetic resonance spectroscopy Microstructure Catalysis Crystallography Polybutadiene Polymerization Polymer chemistry Materials Chemistry Cis–trans isomerism
Zdroj:	Polymer. 33:5202-5207
ISSN:	0032-3861
DOI:	10.1016/0032-3861(92)90802-4
Popis:	The structure of initial, ultimate and inner chain units in polybutadiene produced with NdCl 3 . 3(i-PrOH)HAl(i-Bu) 2 was studied by means of 13 C nuclear magnetic resonance spectroscopy. Initial units are shown to be predominantly of trans -CH 3 CHCHCH 2  structure. Conversely, 90% of inner units have cis configuration. Ultimate units obtained by quenching with H 2 O (D 2 O) are predominantly of 1,2 structure. On the basis of the data obtained, the polymerization mechanism was discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dde0df538507d5d9b5858e5157f68b11 https://doi.org/10.1016/0032-3861(92)90802-4 Zobrazit plný text záznamu