13C-NMR STUDY ON THE CHAIN TERMINAL STRUCTURE OF POLY-1,3-PENTADIENE POLYMERIZED WITH RARE EARTH CATALYST

XIE Demin; GONG Zhi; WANG Fosong

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13C-NMR STUDY ON THE CHAIN TERMINAL STRUCTURE OF POLY-1,3-PENTADIENE POLYMERIZED WITH RARE EARTH CATALYST

Papers | Updated：2021-06-21

- 13C-NMR STUDY ON THE CHAIN TERMINAL STRUCTURE OF POLY-1,3-PENTADIENE POLYMERIZED WITH RARE EARTH CATALYST
- Vol. 5, Issue 2, Pages: 109-113(1987)
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- Published：20 June 1987
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XIE Demin, GONG Zhi, WANG Fosong. 13C-NMR STUDY ON THE CHAIN TERMINAL STRUCTURE OF POLY-1,3-PENTADIENE POLYMERIZED WITH RARE EARTH CATALYST[J]. 1987, 5(2): 109-113.
DOI：

XIE Demin, GONG Zhi, WANG Fosong. 13C-NMR STUDY ON THE CHAIN TERMINAL STRUCTURE OF POLY-1,3-PENTADIENE POLYMERIZED WITH RARE EARTH CATALYST[J]. 1987, 5(2): 109-113. DOI：

摘要

The sequence distribution and the terminal structures of poly-1

3-pentadiene chains obtained by rare earth catalyst and effect of polymerization temperature on microstructure of the polymer have been investigated by 13C-NMR method. According to experimental results it was supposed that terminal active growing chain of the polymer would be four types of anti- and syn-η3-allyl structures. When polymerization temperature was reduced

the content of cis-1

4-poly-1

3-pcntadiene increases. It can be explained by isomerization between anti-and syn-η3-allyl.The process forming trans-1

2 unit instead of 3

4-unit were also described.

Abstract

The sequence distribution and the terminal structures of poly-1

the content of cis-1

4-poly-1

3-pcntadiene increases. It can be explained by isomerization between anti-and syn-η3-allyl.The process forming trans-1

2 unit instead of 3

4-unit were also described.

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