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카르복시메틸아미노화 폴리스티렌系 킬레이트樹脂의 合成과 吸着特性
鄭宅相 서울産業大學校 1985 논문집 Vol.22 No.1
Polystrene-based chelating resins with carboxymethyl amino group were prepared as follows: N-mono(carboxymethyl) polystyrene was prepared by chloromethylation of styrenedivinyl benzene copolymer, followed by the reaction with glycine ethyl ester, and finally by alkali hydrolysis of the product. N-di(carboxymethyl)-aminomethyl polystyrene was prepared by the reaction of chloromethylated copolymer with iminodiacetonitrile, followed by acid hydrolysis of the product. The carboxymethylated type chelating resin was prepared by the reaction of copolymer with ethylenediamine, followed by the carboxymethylation of the aminated copolmer. Adsorptivities of the heavy metal ions such as ??, ??, ?? and ?? ions to these chelating resins were investigated.
폴리스틸렌의 클로로메틸레이션과 아미노산 誘導體를 가지는 킬레이트 樹脂의 金屬이온 吸着에 관한 硏究
鄭宅相 서울産業大學校 1981 논문집 Vol.15 No.1
On the chloromethylation of palystyrene in chloromethyl-methylether by Friedel-Crafts catalysts, effects of catalyst and solvent on the reaction rate and on the formation of crosslinking were studied. In the case where zinc chloride was used as reaction catalyst, the chloromethylation rate is slower than other two cases (i. e. aluminum chloride and stannic chloride), but closslinking formation in zinc chloride catalyzed reaction is much smaller than those in other two catalyzed reactions. The presence of ethylenedichloride as solvent has influenced especially on the aluminum chloride catalyzed reaction to decrease the chloromethylation rate and to promoto remarkably its closslinking formation. A new chelato forming resin has been prepared starting from chloromethylated polystyrene by the reaction of it with iminodiacetonitrile followed by acid hydrolysis of the product. This resin exhibited a characteristic affinity to metal ions such as Cu? and Hg? ions. Although the 7.5% duvinylbenzene crosslinking resin has exhibited no affinity to Fe?, Fe?, Ni? and Ba? ions, its adsorption capacities to Cu? and Hg? ions amounted to 0.8 and 2.9 meq/g respectively, under the same conditious, The affinity of Cu? ion did change with pH so sensitive(max. at pH5.1) that a linited degree of separation of this ion from Hg? ion was possible by an appropriate choice of pH in the cloumn.
폴리스티렌의 티올유도체계 킬레이트 樹脂의 金屬이온 吸着特性 (Ⅰ)
鄭宅相 서울産業大學校 1986 논문집 Vol.23 No.1
Thiol derivated polystyrene-based chelating resins were prepared by chloromethylation of styrene-divinylbenzene copolymer, followed by the reaction with sulfur-containing compounds such as thiourea and 2-aminoethanethoil respectively, and the carbaxymethylated chelating resin was also prepared by carboxymethylation of the aminoethanethiomethyl polystyrene resin with monochloroacetic acid. Adsorptivicies of the metal ions such as ??, ??, ??, ?? and ?? ions to these chelating resins were investigated by means of batch process.
폴리스티렌의 티올유도체계 킬레이트 樹脂의 金屬이온 脫着特性(Ⅱ)
鄭宅相 서울産業大學校 1988 논문집 Vol.28 No.1
스티렌-디비닐벤젠 共重合體를 클로르 메틸화 반응으로 -CH₂Cl기를 도입시킨 후 thiourea를 반응시켜 thiol 유도체계 킬레이트수지를 合成하였으며, 또한 2- aminoethanethiol을 반응시켜 아미노산基와 술파이드基를 가진 킬레이트 수지를 合成하였고, 이 수지를 다시 카르복시멕틸화한 킬레이트 수지를 合成하였다. 前報에서는 이 수지들에 대한 금속이온들(Hg++, Pb++, Cd++, Cr++, 및 Cu++)의 吸着特性을 檢討하였으며, 本報에서는 이 吸着 된 樹脂들의 脫着分離特性과 再生成등을 컬럼 크로마토그래피法으로 檢討하였다. Thiol derivated polystyrene-based chelating resins, that is, Mercaptomethyl polystyrene, Aminoethanethiomethyl polystyrene and N-di (carboxymethyl) aminoethanethiomethyl polystyrene, were prepared by the reaction of styrene-divinylbenzene copolymer (DVB 3%). Adsorptivivies of the metal ions to these chelating resins were investigated in the previous paper and desorption characteristics and regeneration of these resins were investigated by column chromatography.
폴리프로필렌 필름상에 이크릴산 단량체의 그라프트 공중합
정택상,선호철,류철모 서울産業大學校 1992 논문집 Vol.35 No.1
Graft copolymerization of acrylic acid onto oriented polypropylene film by using benzophenone as a photosensitizer in a aqueous medium was carried out under ultravoilet radiation. The effects of polymerization conditions on graft yields were examined. The graft yield was increased up to limiting point and decreased after the point, as AA concentration and BP concentration were increased. And the graft yield was increased by increasing the reaction time to 150 minutes and leveled off. The graft yield was increased with increasing the reaction temperature up to 50℃ but decreased above that temperature.