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Polystyrene/Cd arachidate 혼합 LB막의 제조와 구조적 성질
박연흠,남성우,박성윤 成均館大學校 科學技術硏究所 1992 論文集 Vol.43 No.2
The spreading behavior of mixed monolayer of polystyrene with arachidic acid at the air-water interface was studied by measuring the surface pressure(π)-surface area per molecule(A) isotherms. Since polystyrene has no hydrophilic group, the π -A isotherms appear to support that polystyrene exists in a dense spherical form at the air-water interface. The observed transfer ratio and wettability indicated that the mixed LB films have been deposited in Y-type. Through the X-ray diffraction measurements, the structure of polystyrene/Cd arachidate mixed LB films has been confirmed as well-ordered structure.
電導性 Poly(acrylonitrile)/Poly(pyrrole) 複合體의 전기화학적 성질
박연흠,한명희 成均館大學校 科學技術硏究所 1995 論文集 Vol.46 No.1
The electrochemical properties of poly(acrylonitrile) (PAN)/poly(pyrrole) (PPy) composites prepared by electrochemical polymerization of pyrrole in an insulating PAN matrix were studied. PAN/PPy composite film on platinum electrode could be repeatedly driven between the conducting and insulating state. Cyclic voltammograms(CVs) showed that the redox reaction of PAN/PPy composite was not electrochemically reversible and dependent on the nature of the electrolyte used. CVs also showed that the growth rate of ppy in PAN matrix was influenced by the polymerization conditions such as the type and the concentration of the electrolyte, the thickness of PAN matrix film, and the anodic switching potential. The relationship between anodic peak current and scan rate during the potential-cycling indicated that the redox reaction of PAN/ PPy composite on platinum electrode was diffusion-controlled reaction.
Nylon 6/Polyvinylalcohol 복합체의 비등온 결정화속도
박연흠,김연상 成均館大學校 科學技術硏究所 1988 論文集 Vol.39 No.1
The non-isothermal crystallization Kinetics of Nylon 6 from the blends of Nylon 6 and poiyvinylalcohol has been investigated by using differential scanning calorimetry. Avrami equation has been employed to analyze the non-isothermal crystallization behavior. By the addition of polyvinylalcohol the crystallization rate of Nylon 6 has been retarded and the crystallinity decreased. Rapid cooling or heating rates increase the crystallization rate due to the athermal nucleation. Avrami exponent n for non-isothermal crystallized samples was found to be in the range of 2.0∼2.3.