Poly (styrenesulfonate) -poly (ethylene glycol) (PSS-MPEG) copolymers were prepared by using methoxypolyethylene glycol (MPEG), isophorone diisocyanate (IPDI), hydroxypropyl acrylate (HPA) , and styrene sulfonic sodium (SSS) as raw materials. The resulting copolymers were characterized by Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (]H NMR) and gel permeation chromatography (GPC). The copolymer had a molecular weight between 40000-140000. Poly (3,4-ethylenedidxythiophene) (PEDOT)/PSS-MPEG aqueous dispersions were then synthesized by chemical oxidation using copolymer PSS-MPEG as the template and dopant. The kinetics of EDOT polymerization was investigated with gas chromatography (GO. Ultra-violet visible absorption, thermal stability and sheet resistance of the films of PEDOT/PSS-MPEG were investigated. The PEDOT dispersion with MPEG showed larger particle sizes than that of PEDOT/PSS. The PEDOT/PSS-MPEG dispersion showed better film formability and gave a smoother surface of the film than that of PEDOT/PSS. It was also found that the film of PEDOT/PSS-MPEG had a lower sheet resistance, which might be due to that PEDOT/PSS-MPEG provided a better film with less defects and MPEG improved the compatibility of PEDOT and PSS phases.%引言@@导电高分子既有导体材料的光电学特性,又有良好的力学性能和可加工性[1],这使得导电高分子材料具有广泛的应用前景.聚噻吩类有机导电材料[2]就是这类材料中的一种.聚噻吩的室温电导率在10-8S·cm-2左右,20世纪80年代拜耳公司开发出的聚噻吩衍生物,聚3,4-乙烯二氧噻吩(PEDOT)的电导率可达到102 S· cm-1以上.这种材料具有高透光性、较好化学稳定性等卓越性能.
展开▼
