http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
열가소성 elastomer의 blow 성형에 관한 연구
허근태 慶星大學校 1999 論文集 Vol.20 No.2
The present study was performed to explain to the technology of blow molding using thermoplastic elastomers. The blow molding was effected a variety of thermoplastic elastomers such as SBC, TPO, TPU, and TPVC. Most of the blow molding methods were improved the technician in the factory. Recently, it appears that new blow molding methods established useful technology in the molding methods of plastics.
산성 고분자합성에 관한 연구 : using oxirane carboxylic acid alkyl ester
허근태 경성대학교 공학기술연구소 2001 공학기술연구지 Vol.8 No.-
Our goal is to increase the amount of anionic groups present in given polymer. Poly(acrylic acid) will be the benchmark material : it bears 1 carboxylate per 3 carbons in every repeat. Maleic anhydride represents the high carboxylate extreme in simple vinyl polymers. The problem is the direct polymerization of maleic anhydride is very difficult and virtually impossible in control. The major issues to address are related to increasing the carboxylate content of polymers. For example, can improved methods for the homopolymerization of maleic anhydride be found, or can copolymers of maleic anhydride and acrylic acid be prepared. This paper was studied that preparation of highly acidic polymer from oxirane carboxylate.
허근태 경성대학교 공학기술연구소 2002 공학기술연구지 Vol.9 No.-
Since the commencement of production of crosslinked polyethylene wire and cable in 1961, modification of polymers with electron beam has been the basic modification technology of industrial materials such as foamed polyethylene, rubber tires, curning of coating also sterilization of medical devices and preservation of environment etc. This paper describes the present status and the future trend of the application of electron.
과망간산 칼륨과 상이동촉매를 이용한 불포화결합의 산화반응에 관한 연구
허근태 慶星大學校 1994 論文集 Vol.15 No.4
The acetylenic compounds reacts with potassium permanganate to give α,β- diketo compounds under mild oxidation system. Mild oxidation system were made from the phase transfer catalyst and carbon monooxide. Also, the ethylenic compounds reacts with potassium permanganate to give the trace of carbonyl compounds under similar conditions.
허근태 慶星大學校 1998 論文集 Vol.19 No.2
The height cellular forming were affected by number of nuclei, stabilization of form, cooling rate of cell, and diffusion coefficient of gas. The number of nuclei was controlled by inorganic additives and organoic salt such as metal stearate. The resin was required high viscosity in forming process. Also, the control of temperature and the cooling rate gave to stabilization of cell in forming process. The amorphous resins were good materials in this high cellular forming techniqu.
허근태 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.10 No.-
Small is not only beautiful but also eminently useful. The virtues of working in the nanodomain are increasingly recognized by scientific community, the technological world and even the popular press. The number of research publications in this area has been increasing exponentially. Additionary, national and international biological, physical, chemical, engineering, and materials science societies and government agencies have been organizing workshops, meeting, and symposia around some aspect of nano particles research with increasing frequency. This paper describes the present status and the future trend of the development of polymer nano composite.
Ruthenium착물 촉매를 이용한 수소이동 반응하에서의 방향족 Amine과 1.3_Propanediol부터의 Quinoline합성
허근태 慶星大學校 1989 論文集 Vol.10 No.2
Aniline과 1,3-propanediol이 촉매량의 Ruthenium trichloride hydrate(RuCl3.nH2O)과 Tributylphosphine(PBu3)의 존재하, Diglyme 환류에서 반응시키면 자발적인 수소발생을 동반하여 Quinoline을 좋은 수율로 얻게 된다. 이 Quinoline의 수율은 Aniline과 1,3-Propanediol의 몰비, 그리고 PBu3와 RuCl3.nH2O의 몰비에 상당히 영향을 받는다. 가장 좋은 수율(76%)은 Aniline과 1,3-Propanediol의 몰비가 2.5일 때, 그리고 PBu3과 RuCl3.nH2O의 몰비가 2.0일 때 이루어진다. 이 반응의 중요한 열쇄중간체로서 N,N'-diarylpropylenediamine (5)과 그 탈수소된 imine 유도체를 제시한다. Aniline Reacts with 1,3-propanediol under reflux in diglyme with spontaneous hydrogen evolution in the presence of a catalytic amount of ruthenium trichloride hydrate(RuCl3.nH2O)-tributylphosphine(PBu3) to give quinoline in good yield. The yield of quinoline was considerably affected by molar ratio, aniline to 1,3-propanediol and PBu3 to RuCl3.nH2O. The best yield (76%) was achieved at the molar ratio, 2.5 aniline/diol and 2.0 fo PBu3/RuCl3.nH2O. As the key intermediate of the reaction, N,N'-diarylpropylenediamine (5) and its dehydrogenated imine derivatives are postulated.
무황변 Polyurethane수지의 합성에 관한 연구 및 이론적인 고찰
허근태 경성대학교 생산기술연구소 1995 생산기술연구지 Vol.2 No.-
The syntheses of non-yellowish polyurethane initiated by trimerization of HMDI (Hexamethylene diisocyanate). The timerization of HMDI was affected by basicity of catalyst and solvent. The kinetic study of the dimer (allophanate, biuret) and trimer (isocyanurate) indicated that the ionic radius of the metallic soup is very important. Potassium ester was effectively one of the catalyst.