SYNTHESIS OF SOLUBLE POLYACETYLENE AND INVESTIGATION OF POLYMERIZATION MECHANISM

HU Xiao-dong; WANG Fo-song; ZHAO Xiao-jiang; YAN De-yue

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SYNTHESIS OF SOLUBLE POLYACETYLENE AND INVESTIGATION OF POLYMERIZATION MECHANISM

Research Article | 更新时间：2021-03-19

- SYNTHESIS OF SOLUBLE POLYACETYLENE AND INVESTIGATION OF POLYMERIZATION MECHANISM
- Acta Polymerica Sinica Issue 4, Pages: 299-305(1987)
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- Published：20 August 1987，
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HU Xiao-dong, WANG Fo-song, ZHAO Xiao-jiang, YAN De-yue. SYNTHESIS OF SOLUBLE POLYACETYLENE AND INVESTIGATION OF POLYMERIZATION MECHANISM. [J]. Acta Polymerica Sinica (4):299-305(1987)
DOI：

HU Xiao-dong, WANG Fo-song, ZHAO Xiao-jiang, YAN De-yue. SYNTHESIS OF SOLUBLE POLYACETYLENE AND INVESTIGATION OF POLYMERIZATION MECHANISM. [J]. Acta Polymerica Sinica (4):299-305(1987) DOI：

摘要

研究了各种催化体系、催化剂浓度及聚合条件对催化效率(f)和聚乙炔分子量()的影响。发现Nd(i-OC3H7)-AlR3(R=C2H5

i-C4H9)催化体系可获得较大的可溶分数(q)。催化剂浓度、Al/Nd克分子比和聚合温度对f、及q均有一定影响。可溶性Nd(i-OC3H7)3-AlR3催化体系的UV光谱证实、Nd的价态与AlR3混合与AlR3混合后保持不变。PA的IR光谱示出

Nd(i-OC3H7)3-Al(C2H5)3及Nd(i-OC3H7)3-Al(i-C4H9)3体系获得的聚合物分别含有CH3CH2—和(CH3)2CHCH2—末端基。上述结果表明

乙炔的聚合可能是通过单体在Nd-C键之间的插入进行的。

Abstract

Effect of various catalyst systems

catalyst concentration and polymerization conditions on the catalytic efficiency (f) and molecular weight (Mn) of polyacetylene (PA) was investigated

it is found that larger amount of soluble fraction (q) of PA was obtained by catalyst systems Nd(i-OC3H7)3-AlR3 (R = C2H5-

i-C4H9). The catalyst concentration

Al/Nd molar ratio and polymerization temperature exert an influence on the f

Mn and q. UV spectra of soluble catalyst systems Nd(i-OC3H7)3-AlR3 confirmed that the valence state of Nd remains unchanged af-ter mixing it with AlR3.Results of IR spectra of PA showed that polymer obtained with Nd (i-OC3H7)-Al(C2H5)3 and Nd(i-OC3H7)3-Al(i-C3H9)3 contained CH3CH2-- and (CH3)2 CCH2-- end group respectively. The above mentioned results and the fact that CH2=CH-- end group was observed for polymers indicated that polymerization of acetylene with studied catalysts might be carried out through insertion of monomer between Nd-C bond.

关键词

聚乙炔稀土催化剂溶解性

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