13C-NMR研究稀土催化聚戊二烯-1,3的末端链结构

谢德民; 龚志; 王佛松

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13C-NMR研究稀土催化聚戊二烯-1,3的末端链结构

研究论文 | 更新时间：2021-03-19

- 13C-NMR研究稀土催化聚戊二烯-1,3的末端链结构
- STUDY ON TERMINAL CHAIN STRUCTURE OF POLYPENTADIENE PREPARED FROM RARE EARTH CATALYST WITH C-13 NMR
- 高分子学报 1988年第1期页码：45-49
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- 纸质出版日期：1988-2-20，
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谢德民, 龚志, 王佛松. 13C-NMR研究稀土催化聚戊二烯-1,3的末端链结构[J]. 高分子学报, 1988,(1):45-49.

XIE De-min, GONG Zhi, WANG Fo-song. STUDY ON TERMINAL CHAIN STRUCTURE OF POLYPENTADIENE PREPARED FROM RARE EARTH CATALYST WITH C-13 NMR[J]. Acta Polymerica Sinica, 1988,(1):45-49.
谢德民, 龚志, 王佛松. 13C-NMR研究稀土催化聚戊二烯-1,3的末端链结构[J]. 高分子学报, 1988,(1):45-49. DOI：

XIE De-min, GONG Zhi, WANG Fo-song. STUDY ON TERMINAL CHAIN STRUCTURE OF POLYPENTADIENE PREPARED FROM RARE EARTH CATALYST WITH C-13 NMR[J]. Acta Polymerica Sinica, 1988,(1):45-49. DOI：

摘要

用13C-NMR方法研究了稀土催化聚戊二烯-1

3的末端链结构及聚合温度对聚合物微观结构的影响。结果指出

聚合物的末端活性增长链是以头-尾或尾-头加成生成的anti-和syn-四种 π-烯丙基。聚合温度降低时

顺-1

4含量增加

这可解释为由于 anti-和 syn-异构化的作用。同时解释了反-1

2结构形成的过程。

Abstract

The terminal structures of poly-l

3-pemadiene chains obtained by rare earth catalyst have been investigated with C-13 NMR method and effect of polymerization temperature on micros-tructure of the polymer has been studied. According to the experimental results it was supposed that the terminal active growing chain of the polymer would be anti- and syn-π-allyl formed in the "head-tail" and "tail-head" addition of the monomer. Therefore

there are four configurations of π-allylic terminal in the stereoregular polymerization of 1

3-pentadiene. When the polymerization temperature was reduced

the content of cis-poly-1

3-pentadiene increased. It is explained by the isomerization between the anti- and syn-π-allyl. The process forming trans-1

2 unit in the polymer was described.

关键词

聚戊二烯-13链末端结构双烯聚合聚合机理序列分布

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