Synopsis: Vapor phase polymerization of a bifunctional thiophene monomer was carried out as a new method for fabricating networked polythiophene layers on polymer substrates. With using a polynorbornene substrate coated with iron (III) chloride as an oxidant, oxidative polymerization of a bifunctional thiophene monomer on the substrate surface was performed with supplying the monomer by its transpiration with using water as a carrier. The copolymerization of the bifunctional thiophene monomer with a monofunctional thiophene in a similar manner allowed to control crosslinking density of the formed networked polythiophene. This copolymerization afforded the corresponding networked polythiophene layer on the polynorbornene substrate effi ciently in an oxidatively doped state by iron (III) chloride. The length of conjugation of the networked polythiophene was comparable to that of the polythiophene obtained by a similar vapor phase polymerization of the monofunctional thiophene.

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Synopsis: It is known that phosphine system as a curing accelerator, generally, provides higher levels of reliability (moisture resistance) for the cured epoxy resin than that obtained with an imidazole accelerator. However, the epoxy resin cured with triphenylphosphine has lower T_g than those obtained with an imidazole accelerator such as 2-ethyl-4-methyl imidazole (2E4MZ). In this study, it is clarified that the epoxy resin cured with tri-p-tolylphosphine showed thermal resistance comparable to those with 2E4MZ, as well as higher reliability of moisture resistance.

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The curing of dicyanate ester monomers occurs through thermal cyclotrimerization of -OCN group to give polycyanurates, a family of heat resistant resins. Conventional catalyzed homopolymerization of cyanate ester using metalloorganic compounds was required step heating process and at temperatures around 250℃ for the full cure. In this work, the novel catalyst, organophosphines, and cyanate and cyanate/ epoxy systems were examined in order to improve the curing conditions. By using the new type of catalyst, it was clarifi ed that a bisphenol A type cyanate ester (BADCY) could be cured 150℃/1h+200℃/5h and the cured resins showed higher T_g, 306℃ than that of using the conventional catalyst. In addition, it was confi rmed that BADCY/ DGEBA accelerate system improved the curing conditions to 200℃/2h and achieved higher T_g around 240℃ by reducing the ratio of epoxy resins. Synopsis Synopsis

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Electric conductivity and adhesive properties of epoxy / silver filler blends were studied in relation to the phase structures of the epoxy matrix resins. Poly ether sulphone (PES) was applied as the modifi er to form the phase structures in the epoxy resin. Diglycidyl ether of bisphenol A (DGEBA) as the epoxy resin was cured with methylene dianiline (MDA). The resin blends of the DGEBA / PES / MDA made the phase structures in the curing process by the reaction-induced phase separation mechanism. Both the epoxy-rich phase and the PES-rich phase made continuous structures (co-continuous morphology) in the 15wt % PES blends. Then, the several amounts of silver fi llers with the diameters of 0.8 μm were added to the DGEBA / PES / MDA blends. Electron microscopy revealed that the silver fi llers were selectively localized in the epoxy-rich phases in the cured blends. The epoxy / PES / silver fi ller (14.6 vol%) adhesives gave more than 10⁷ times in the electric conductivity than the corresponding epoxy / silver fi ller adhesives without the PES. It is estimated that the localized silver fi llers in the epoxy-rich phase give more chance to contact each other and make more conducting pass than the case without the PES. Synopsis

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SynopsisNovel polymer materials bearing unique chemical structures prepared by chemical reaction at the interfaces are introduced. Cross-linked polymer materials, including thin fi lms, soft gels, and hollow capsules, consisting of composite polymer nanofilms were prepared by click reaction at oil－water interfaces between lipophilic polymers or between lipophilic and hydrophilic polymers. The combination of lipophilic and hydrophilic polymers produced “Janus” nanofi lms with both hydrophilic and lipophilic surfaces. As chemical liquid deposition onto solid－liquid interfaces, covalent bonded 2D supramolecular adlayers and colored π-conjugated polymer thin fi lms were constructed by means of adsorption induced Schiff-base coupling controlled by delicate control of solution pH in aqueous solutions containing molecular building blocks.

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