STUDY ON THE CYCLIZATION DURING THE CATIONIC POLYMERIZATION OF 1,3 PENTADIENE

PENG Yuxing; LIU Jialin; DAI Hansong; CUN Linfeng

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STUDY ON THE CYCLIZATION DURING THE CATIONIC POLYMERIZATION OF 1,3 PENTADIENE

Research Article | 更新时间：2021-03-19

- STUDY ON THE CYCLIZATION DURING THE CATIONIC POLYMERIZATION OF 1,3 PENTADIENE
- Acta Polymerica Sinica Issue 1, Pages: 19-24(1997)
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- Published：20 February 1997，
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PENG Yuxing, LIU Jialin, DAI Hansong, CUN Linfeng. STUDY ON THE CYCLIZATION DURING THE CATIONIC POLYMERIZATION OF 1,3 PENTADIENE. [J]. Acta Polymerica Sinica (1):19-24(1997)
DOI：

PENG Yuxing, LIU Jialin, DAI Hansong, CUN Linfeng. STUDY ON THE CYCLIZATION DURING THE CATIONIC POLYMERIZATION OF 1,3 PENTADIENE. [J]. Acta Polymerica Sinica (1):19-24(1997) DOI：

摘要

以ＡｌＣｌ３和（ＣＦ３ＳＯ３）３Ａｌ为引发剂

ＣＨ２Ｃｌ２为溶剂

在２０℃聚合了１

３戊二烯（ＰＤ）．对聚合物（ＰＰＤ）的结构分析表明

（ＣＦ３ＳＯ３）３Ａｌ生成的聚合物具有较高的环化度．聚合物的环化过程是通过两种机理

分子内链转移机理和阳离子引发机理

后者可以通过加入ＤｔＢＰ得到抑制．ＡｌＣｌ３引发的聚合反应中环化过程以前一种机理为主

而（ＣＦ３ＳＯ３）３Ａｌ则以后一种机理为主．通过阳离子引发的环化反应主要发生在ＰＰＤ１

２单元侧基双键上

Abstract

Pentadiene was polymerized in CH2Cl2 at 20℃

initiated by AlCl3 and (CF3SO3) 3Al.The polymer chain contains both linear segments and cyclic structures.The cyclic fractions of PDD prepared by AlCl3 and by (CF3SO3)3Al are respectively 25% and 48%.The cyclization reaction takes place through two processes:(Ⅰ)Intramolecular chain transter;(Ⅱ)protonic initiation.The process(Ⅱ)could be essentially hindered in the presence of DtBP.The cyclization of PPD induced by AlCl 3 occurs mostly through the process(Ⅰ) and the cyclization in the polymerization initiated by (CF3SO3)3 Al is induced mainly by the process(Ⅱ).In the process(Ⅱ)the cyclization takes place on the double bonds of the lateral groups of 1

2 units.

关键词

１.３-戊二烯阳离子聚合环化聚合三氯化铝三氟甲基磺酸铝

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