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삼산지역을 대기질예측에 관한 연구 : 울산공단을 중심으로
백중현 忠南大學校 環境問題硏究所 1992 環境硏究 Vol.10 No.-
This study was performed to delineate the present air pollution level in the Samsan region of Ulsan, to investigate the environmental effects, and to find the measures of attaining the clean environmental in the Samsan region. The observed concentration of sulfur dioxide are 7.1∼43.8 ppb at all sites. These values are lower than those of the current air quality standards, 50 ppb. The data also shows that observed concentrations of hydrogen fluoride are 2.2∼4.4 ppb. The simulated concentrations of hydrogen fluoride in 1994 and 1995 belong to enforced environmental standard will be reduce to 0.3 and 0.13 times each than those of 1991.
PPG와 MDI를 이용한 Polyurethane Ionomer의 합성과 전기전도성에 관한 연구
맹기석,송해영,김동철,백중현 忠南大學校 産業技術硏究所 1988 산업기술연구논문집 Vol.3 No.1
Hydroxyl-terminated polyether polyurethanes based on 4,4′-diphenyldiisocyanate(MDI), N-methyldiethanolamine(MDEA) and polypropylene glycol-2,000(PPG) were synthesized with constant level of hard segment. The tertiaryamine of MDEA was sulfonated with r-propane sultone thereby converting the polyether polyurethane to a polymeric Zwitterion. Electrically conducting polyurethane ionomer film was prepared by introducing copper sulfate. The CuxS-induced electrical conducting of polyurethane ionomer film was higher by order 10⁴ than that of the original film. The morphology of CuxS-induced PU, PUI film surface was investigated with SEM.
구리 이온을 도입한 PAN과 A-PAN의 도전성에 관한 연구
백중현,송해영,손원근,여창열 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.2
The PAN-Cu(Ⅱ) and A-PAN-Cu(Ⅱ) complexes were the most stable in the pH 11. The morphology of CuxS-induced PAN, A-PAN had changed into compact form. The Cu(Ⅱ) complex exhibited surface resistivity around 10Ω㎝ when modified iodine in acetone. The resistivity was significantly affected by the amounts of added cupric chloride, iodine and results were satisfactorily obtained by adding more than 20wt% of cupric chloride and about 3wt% iodine. The optimum conduction for the introducing of CuxS was at the CuSO₄concentration of 30g/ℓand the reaction time of 3hrs. The electrical conductivity of CuxS-induced PAN and A-PAN was higher by order of 10-⁴than of the Cu(Ⅱ)complex.
Cu S 를 도입한 Acrylamidoxime-Vinyl phosphate 공중합체의 전기적 성질
백중현,송해영,박요한,서구원 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.2
The AN-VP-Cu(Ⅱ) and A-AN-VP-Cu(Ⅱ) complexes were the most stable in the pH11. The morphology of Cu S-induced AN-VP, A-AN-VP had changed into compact form. The thermal stability Cu S-induced AN-VP, A-AN-VP had been determined by DSC measurement. As result, it had been observed that thermal stability for Cu S-induced AN-VP was stabilized more than that of Cu S-induced A-AN-VP. The Cu(Ⅱ) Complex exhibit surface resistivity about 40∼100Ωcm range when modified iodine in acetone. The electrical conductivity of Cu S-induced AN-VP and A-AN-VP were about 0.06∼0.3Ω-¹·Cm-¹ range.
김환영,송해영,백중현 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.2
Isotope between uranyl complexes in aqueous solution and ions in cation exchange resin was experimentally student. The uranium bands absorbed on exchange resin could be maintained during elution process. The isotope coefficients εof the uranyl complex system determined by a chromatographic method were (uranylchloride system), (0.88 ±0.1) ×10-⁴(glycolate), (1.42 ±0.15) ×10-⁴(lactate) and (2.18 ±0.2) ×10-⁴ at 25 ℃.
류해일,백중현,김영유 공주대학교 사범대학 과학교육연구소 1998 과학교육연구 Vol.29 No.1
현대 과학에서 가장 첨예하게 대두되는 것은 전자 제품의 개발 및 경쟁적 연구 투자이다. 고도의 기술을 요하는 전자 제품의 사용은 그 목적과 이용 방법에서 새로운 특성과 안전을 요구하고 있다. 특히 항공기, VTR, TV, 전자 회로, 컴퓨터 등의 정밀 제품에서 발생하는 전자기적 간섭 효과는 기기의 정밀도 및 수명을 저해하며 파괴의 원인이 되어지고 있다. 이러한 관점에서 본 연구에서는 유리, 금속 표면, 전자장치, 폭발물 및 인화성 보관 용기 등의 각종 전자 제품에 이용할 수 있는 전도성 수지 및 테이프를 개발하여, 전자기 제품에 안정성을 제공하고 수지의 전기전도도, 접착력, 내열성, 박리 강도, 점도 및 정전기 발생 등의 물리적 특성을 분석하여 최적 조건을 도출하여 개발하고 그의 응용성을 연구하였다. Nowadays, the development of the tapes which have anti-electrostatic adhesion at aircraft, VTR, TV, electric circuit, and computer brings much profits to industries. The development of industrial techniques needs specialized materials which are stable under the chemical and physical conditions, because it provides valuable products on a particular type of adhesive property. In this study, anti-electrostatic adhesive tapes were studied as a new form which can be used on glass, metal surface, electronic products, electronic device, car, aircraft accessaries, and exploder.
방사선 전조사에 의한 PP Membrane에 대한 Acrylonitrile 그라프트 공중합체의 합성
황택성,백중현,주재오,맹기석 忠南大學校 産業技術硏究所 1990 산업기술연구논문집 Vol.5 No.1
A porous, graft copolymer and amidoxime group containing membrane were prepared by radiation graft copolymerization of acrylonitrile onto porous polypropylene. In order to calculate the grafting and amidoxime ratios of porous polypropylene-acrylonitrile graft copolymer. We have done CHN elemental analysis. It is obtained the result that grafting rate is increased to linear and value was about 75 percent at 20 Mrad dose rate.