New insights into the microstructure of GILCH-polymerized PPVs

被引:181
作者
Becker, H
Spreitzer, H
Ibrom, K
Kreuder, W
机构
[1] Covion Organ Semicond, D-65926 Frankfurt, Germany
[2] Univ Magdeburg, Inst Chem, D-39106 Magdeburg, Germany
关键词
D O I
10.1021/ma990347q
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The microstructure of GILCH-polymerized PPVs was examined by NMR techniques. Selectively main-chain C-13-labeled polymers were prepared and investigated by H-1 NMR, C-13 NMR, and 2D NMR methods. Only one major polymerization defect was discovered: tolane-bisbenzyl (TBB) moieties could be proven in amounts of 1.5-2.2% for OC1C10-PPV. Furthermore, indications for ether-type end groups (similar to 0.2%) were found. These defects are readily explained by the polymerization mechanism. Other structural elements (e.g., cis double bonds, branching) were not detected.
引用
收藏
页码:4925 / 4932
页数:8
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