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수용성 Polymer-metal Complex의 형성과 중합 개시제로서의 활용성에 관한 연구(Ⅰ)
맹기석,송해영,권오승,황명천,황택성 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(B)
The formation of Water-Soluble Poly(Methacrylic acid) (PMA) and poly (acrylamide) (PAAm)-Cu(II) complexes was achieved at various PH. The structures and the optimum conditions for the formation of complexes have been determined through UV, IR and viscosity measurements. In addition, it was found that they can be used as an initiator for vinyl type monomers. Formed polymer-metal complexes are the most stable at around PH=7 and therefore give rise to maximum absorbance in UV spectrum. As PH is increased the conformation of polymer-metal complexes has become more compact. This can be explained in terms of decreasing viscosity with increasing PH. It was also observed that the function as an initiator of the polymer-metal complexes is very active at around PH=7 and the complexes can polymerize vinyl type monomers up to 10% Conversion. These results can explain the fact that the stable complexes were formed at around PH=7 and the formed complexes can be used as good initiators.
Galvanic Reaction에 의한 Chalcopyrite와 Pyrite의 환원에 대한 연구
孟琦錫,姜龍 충남대학교 공업교육연구소 1981 論文集 Vol.4 No.2
As one of processes to recover copper from metal ore, galvanic reaction which converts chalopyrite(CuFeS_2) to chalocite(Cu_2S) was studied systematically. Whether this system is applicable to pyrite(FeS_2)-copper couple to recover iron from pyrite was also investigated. Particle size, reaction temperature, and reaction time were selected as experimental variables, and a surface reaction model was employed to analyze the galvanic reaction of the chalopyrite and copper system. As a result of the experiment, the galvanic reaction is fesible for the chalcopyrite-copper system but it is not convient for the pyrite-copper coupling. By increasing the contact area and the temperature and by decreasing the particle size, the reaction conversion is increased. The surface reaction model seems to well fit the shrinking core model which is derived in terms of the chemical reaction engineering.
工業敎育大學 工業化學敎育科의 敎科課程 改善에 관한 硏究
송해영,홍원표,맹기석,윤석호,노재성,강용 충남대학교 공업교육연구소 1983 論文集 Vol.6 No.2(A)
The methods for the improvements of curriculum of the Department of Industrial Chemistry Education were examined in some detail discussing the following items; 1) Comparison and analysis of the new curriculum with the old of the Department of Chemical Industry in technical high school. 2) Examination of the current curriculum of the Department of Industrial Chemistry Education in Industrial Education College. 3) Suggestion of the improved curriculum suitable for the students in the Department of Industrial Chemistry Education.