Synthesis and characterization of electro-active materials prepared from starburst homopolymer and block copolymer
Date Issued
2005
Date
2005
Author(s)
Wang, Yih-Wen
DOI
zh-TW
Abstract
A three-step synthetic route for preparing an aqueous dispersion of starburst polystyrene sulfonic acid/ polyethylenedioxythiophene (PSS/PEDOT) and poly( n-butyl acrylate-b-styrene sulfonate)/ polyethylenedioxythiophene (PBA-b-PSS/PEDOT) electro-active composites based on core-first method has been developed. First, PS and PBA-b-PS starburst polymers were synthesized by atom transfer radical polymerization (ATRP) method using four, six, and tweleve -functional alkyl halides as core molecules. Second, polymers of PS and PBA-b-PS were converted into water-soluble star PSS and PBA-b-PSS through the sulfonation of PS segments by acetyl sulfate. Finally, 3, 4-ethylenedioxythiophene monomer was in-situ polymerized using ammonium persulfate as an oxidant in the presence of starburst PS and PBA-b-PSS. The UV-visible absorption spectra showed very strong polaron peak between 800nm and 1000nm, indicating the high doping level of PEDOT by PSS during the polymerization process. Chemical structure and molecular weight characteristics of these copolymers were studied by NMR, IR and GPC techniques. The GPC and 1H NMR showed that each polymeric arm of the star exhibited a well-defined chain length and a well-control charge fraction.
Subjects
原子轉移自由基聚合
聚丙烯酸正丁酯
聚苯乙烯磺酸
PSS/PEDOT
star polymer
PEDOT/PSS
polystyrene
conducting polymer
poly(n-butyl acrylate)
ATRP
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-94-R92549022-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):0f96ba2db4f4d9ddf6828e8ee840d91e