Synthesis of Conducting/Insulating Block Copolymers of Poly (3-hexyl thiophene)-b-Poly (2-vinyl pyridine) Using Anionic Polymerization of End Functionalized Poly (3-hexyl thiophene) Macroinitiators
Date Issued
2006
Date
2006
Author(s)
Lai, Dai-liang
DOI
zh-TW
Abstract
This thesis describes a new method to synthesize rod-coil block copolymers consisting of poly (3-hexyl thiophene) (P3HT) as rigid-rod conducting polymer and poly (2-vinyl pyridine) as flexible coil. Regioregular hydrogen-terminated poly (3-hexyl thiophene)s of well-defined molecular weight were synthesized by using Grignard metathesis of 2,5-dibromo-3-hexyl thiophene monomer followed by the conversion of poly (3-hexyl thiophene) terminal groups to hydrogen.
The hydrogen-terminated poly (3-hexyl thiophene)s thus synthesized are metalized with a replacement of end-group hydrogen with lithium by treating a mixture of sec-butyl lithium/N,N,N’,N’-tetramethyl-1,2-ethylenediamine (SBLi/TMEDA) in 1:1 molar ratio in THF. The lithiated poly (3-hexyl thiophene) are found to be an effective macroinitiator for living anionic polymerization of 2-vinyl pyridine (2VP) monomer.
The hydrogen-terminated poly (3-hexyl thiophene)s thus synthesized are dissolved in THF and deprotonated by treating the solution with a mixture of sec-butyl lithium/N,N,N’,N’-tetramethyl-1,2-ethylenediamine (SBLi/TMEDA) in 1:1 molar ratio in THF at -40
Subjects
陰離子聚合
聚三己烷基噻
吩
聚二乙烯吡
啶
嵌段式共聚物
P3HT
P2VP
block-copolymer
Type
thesis
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