Poly(3-perylenylmethyl methacrylate)의 전기적 성질

전일련,구광모,김우식 경북대학교 산업기술연구소 1993 産業技術硏究誌 Vol.21 No.-

In order to develop new types of electrically conducting polymers, poly(3-perylenylmethyl methacrylate)(PPeMMA), a novel polymer containing a perylenyl chromophore as the pendant group has been investigated. Chemically-doped PPeMMA was prepared by exposing PPeMMA to iodine vapour for 1-30 days. The partial pendant perylenyl groups of the doped polymers were observed to contain oxidized radical cations, as identified by e.s.r. spectrum and elemental analysis. The doped PPeMMA exhibits a conductivity of ca. 10^-8 S ㎝^-1 with a activation energy of ca. 0.36 eV.

Perylene유도체의 화학적 산화 및 환원 특성

全一鍊 慶一大學校 1997 論文集 Vol.14 No.2

In order to investigate radical ions of perylenyl groups, which play an important role in electrical properties of conducting polymers, we prepared radical cations or anions of perylene derivatives which were identified by electronic absorption spectra and electron spin resonance spectra. Chemical oxidation of perylene, 3-vinylperylene, and poly(3-vinylperylene) was carried out by aluminum chloride in the dichloromethane solution. Stabilities of radical cations produced by chemical oxidation and electrochemical oxidation are different from each other. Chemical reduction of the perylene derivatives was also carried out by treatment with potassium in the tetrahydrofuran solution. Radical anions of perylene, 3-vinylperylene, and poly (3-vinylperyene by chemical reduction were stable under vacuum.

Poly(3-perylenylmethyl methacrylate)의 합성

具廣謨,全一鍊 慶一大學校 1993 論文集 Vol.9 No.1

In order to obtain a high molecular weight polymer containing the pendant perylene chromophore, poly(3-perlenylmethly methacrylate)(PPeMMA) was selected. PPeMMA monomer was prepared by the reaction of 3-hyddroxymethylperylene with methacryloyl chloride in tetrahydrofuran in the presence of triethylamine at room temperature. PPeMMA polymer was prepared by azobisisobutyronitrile-initiated radical polymerization of PeMMA in benzene. The PeMMA and the corresponding polymer were characterized by spectroscopic methods. The polymer was insoluble in ordinary organic solvents.

측쇄에 Perylene을 함유한 비공역계 전도성고분자의 전기적 성질

具廣謨,全一鍊 慶一大學校 1997 論文集 Vol.14 No.2

In order to develop new types of electrically conducting polymers, novel non-conjugated polymers containing a perylenyl chromophore as a pendant group, poly(3-vinylperylene) and poly (3-perylenylmethyl methacrylate), have been investigated. Chemically-doped polymers obtained on exposure to iodine vapor exhibited room-temperature conductivities of 10-6 S cm-¹for a sample of poly(3-vinylperylene) with a doping degree of ca. 32% and 10-8 S cm-¹for poly(3-perylenylmethyl methacrylate) with a doping deree of ca. 17%. The electrochemically-doped poly(3-vinylperylene) with doping degrees of 71∼86%, prepared by both electrolytic polymerization of 3-vinylperylene and electrochemical doping of poly (3-vinylperylene), exhibited room-temperature conductivities of 10-5∼10-⁴S cm-¹with activation energies of ca. 0.3∼0.4 eV. Poly(3-vinylperylene) was shown to function as a new type of cathode-active material for a rechargeable lithium battery.

아크릴아미드-메타크릴아미드공중합체와 산성염료와의 결합

김우식,문성인,오대희,전일련 慶北大學校 産業開發硏究所 1985 硏究報告 Vol.13 No.-

Polyacrylamides which have different molecular weight and poly (acrylamide-co-methacrylamide)s which have different composition ratio were prepared. And the interaction of these polymers with methyl orange was studied by an equilibrium dialysis method in buffer solution (pH7) at 10, 20, 30, 40℃, respectively. The first binding constants and thermodynamic parameters in the course of the binding were calculated. The favorable free energy of the binding of methyl orange seems to be a result of the entropy change rather than the enthalpy change. The binding ability of methyl orange by poly(acrylamide-co-methacrylamide) was higher than that of methyl orange by polyacrylamide. The result is likely to be due to the hydrophobic property of methyl group in copolymer. However, the binding ability of methyl orange by poly (acrylamide-co-methacrylamide) of which composition ratio was 1:1 was lower than that of methyl orange by poly(acrylamide-co-methacrylamide) of which composition ratio was 2:1. This result is likely to be due to the conformation of the polymer. The thermodynamic parameters obtained were also discussed.

전도성고분자를 이용한 이차전지의 특성

全一鍊 慶一大學校 1995 論文集 Vol.11 No.1

Rechargeable batteries using electrochemically-doped poly(3-vinylperylene) or poly(e-perylenylmethyl methacrylate) as a cathode and lithium as an anode were fabricated, and their performance characteristics discussed. Electrochemically-doped poly(3-vinyleperlyene) is shown to function as a new type of cathodeactive material for a lithium rechargeable battery. The battery exhibits a flat discharge cell voltage at current densities up to 0.8 mA cm??, a high coulombic efficiency as much as over 90% and good cyclability.

비닐계 고분자의 전기적 성질

全一練 慶一大學校 1999 論文集 Vol.16 No.5

In order to investigate electrical properties of vinyl polymers containing pendant π-electron systems, we have discussed electrochemically doped poly(3-vinylperylene)(PVPe) compared with poly(N-vinylcarbazole)(PVCz). The elctrochemically doped PVCz showed electrical conductivities up to 10-⁴ S cm-¹and which were found to exhibit high electrical conductivities in the vinyl polymers containing pendant π-Electron Systems. This is probably due to higher doping degree of PVPe and higher mobility of PVCz than the other vinyl polymers. The electrical conductivity of the vinyl polymer depends on the doping level, change carrier mobility, and activation energy of the polymer.

측쇄에 π전자계를 함유한 비공역계 전도성고분자의 전기적 성질

全一鍊 慶一大學校 1999 論文集 Vol.16 No.2

As a part of studies on electrical properties of conducting polymers containing pendant л-electron systems, some nonconjugated polymers such as electrochemically doped poly(3-vinylperylene)(PVPe), chemically doped PVPe and electrochemically doped poly(1-vinylpyrene)(PVPy) have been investigated. Electrochemically doped PVPe with doping degrees of 71∼86%, prepared by both electrolytic polymerization of 3-vinylperylene and electrochemical doping of PVPe, exhibited room temperature conductivities of 10-5∼10-⁴S cm-¹with activation energies of ca. 0.3∼0.4 eV. Room temperature conductivity of ca. 10-7 S cm-¹was observed for the electrochemically doped PVPy with a doping degree of ca. 35%. Electrochemically doped PVPe was found to exhibit much higher electrical conductivities than electrochemically doped PVPy. This is probably due to higher doping and mobility of charge carries for PVPe than for PVPy.

Doping된 Poly(3-vinylperylene)의 제조 및 전기적 특성

전일련 경일대학교 산업기술연구소 1995 産業技術硏究所 論文集 Vol.5 No.-

Poly(3-vinylperylene) has been prepared by radical polymerization of 3-vinylperylene, and characterized by spectroscopic methods, mol. wt. determination, and differential scanning calorimetry. Doped polymers have been prepared by electrolytic polymerization of 3-vinylperylene, electrochemical doping of poly(3-vinylperylene) and chemical doping of poly(3-vinylperylene). The pendant perylenyl groups of the doped polymers were observed to contain oxidized radical cations, as identified by IR, ESR, and electronic absorption spectrum. The electrochemically-doped poly(3-vinylperylene) with doping degrees of 71∼86%, prepared by both electrochemical doping of poly(3-vinylperylene) and chemical doping of poly(3-vinylperylene), exhibited room temperature conductivities of 10??∼10⁴ S cm¹ with activation energies of 0.3∼0.4eV. The chemically-doped poly(3-vinylperylene) obtained on exposure to iodine vapor exhibited room temperature conductivity up to 10?? S cm?? with a doping degree of 32%. The electrical conduction for these polymers is of thermally activated process, which is illustrated in arrhenius plots for electrical conductivities of doped polymers.

γ-알루미나의 표면 산성도에 대한 양자화학적 해석

金明哲,全一鍊 慶一大學校 1995 論文集 Vol.12 No.2

A variety of methods has been suggested to determine the acidity of γ-alumina. A titration method using Hammett indicators and a gas phase adsorption method using acidic probe molecules by means of combined volumetry-calorimetry technique are representative. In this study, the CNDO/2 calculations have been applied on cluster models for the typical active sites on γ-alumina to get charge densities, LUMO energies and bond orders. The B acidities of models were invesigated in terms of O-H bond orders. And the calculated LUMO energies showed the L acidities of the active sites.