Structure of initial, ultimate and inner chain units of polybutadiene obtained with a rare-earth catalyst as revealed by C nuclear magnetic resonance spectroscopy期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	K.D. Skuratov M.I. Lobach A.N. Shibaeva L.A. Churlyaeva T.V. Erokhina L.V. Osetrova V.A. Kormer

Affiliation:	S.V. Lebedev All-Union Synthetic Rubber Research Institute (VNIISK), 198035, St Petersburg, Russia

Abstract:	The structure of initial, ultimate and inner chain units in polybutadiene produced with NdCl₃. 3(i-PrOH)---HAl(i-Bu)₂was studied by means of ¹³C nuclear magnetic resonance spectroscopy. Initial units are shown to be predominantly of trans-CH₃CH=CHCH₂--- structure. Conversely, 90% of inner units have cis configuration. Ultimate units obtained by quenching with H₂O (D₂O) are predominantly of 1,2 structure. On the basis of the data obtained, the polymerization mechanism was discussed.

Keywords:	structure chain units polybutadiene rare-earth catalysis ¹³C nuclear magnetic resonance spectroscopy
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