新型3-取代己烷聚(口塞)吩/黏土奈米複合材料之製備與其性質研究及應用

任堅志

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新型3-取代己烷聚(口塞)吩/黏土奈米複合材料之製備與其性質研究及應用

Synthesis and Study of Novel Poly(3-Hexylthiophene)/Clay Nanocompositie materials

任堅志 , Masters　　Advisor：葉瑞銘　　

繁體中文

防腐蝕；導電高分子； polythiophene ； anticorrosion ； Clay ； conducting polymer

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Abstract

A series of Nanocomposite materials that consisted of layered montmorillonite (MMT) clay and poly(3-hexylthiophene) (P3HT) were prepared by effectively dispersing the inorganic nanoclayers of MMT clay in organic poly(3-hexylthiophene) matrix via in-situ polymerization.
Organic 3-Hexylthiophene monomers were first intercalated into the interlayer regions of organophilic clay hosts and followed by a one-step oxidative polymerization. The as-synthesized poly(3-hexylthiophene)/ clay lamellar nanocomposite materials were characterized by infrared spectroscopy, wide-angle powder X-ray diffraction, and transmission electron microscopy.  Poly(3-hexylthiophene)/clay Nanocomposites in the form of coating with clay loading (e.g., 5%) on cold-rolled steel (CRS)   were found superior in corrosion protection over those of conventional Poly(3-hexylthiophene) based on a series of electrochemical measurements of corrosion potential, polarization resistance, and corrosion current in 5 wt-% aqueous NaCl electrolyte. The molecular weights of P3HT extracted from poly(3-hexylthiophene)/clay materials and bulk poly(3-hextythiophene) were determined by gel permeation chromatography (GPC) with THF as eluant. Effects of the material composition on the gas barrier property, thermal stability, flame retardant and mechanical strength of P3HT along with poly(3-hexylthiophene)/clay materials, in the form of both fine powder and free-standing film , were also studied by gas permeability measurements, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), limiting oxygen index (LOI) measurements and dynamic mechanical analysis (DMA).

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