http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
카본/페놀 복합재료의 제조와 그 전기전도성에 관한 연구
葛英淳,李才熙,陳省昊,張相熙,李馨植 慶一大學校 1997 論文集 Vol.14 No.2
The mechanical properties and electrical conductivity of spun carbon fiber/phenolic composites were tested and evaluated. The tensile and flexural strengths of carbon/phenolic composite specimens were 16.8 ksi and 25.0 ksi, respectively. The electrical conductivities of carbon/phenolic specimens were generally similar in the all range of test temperatre. The lowest electrical conductivity was observed at 150℃, which is originated from the morphology change due to the glass transition of cured phenolic matrix. The activation energy on the conductivity at the temperature range of 150∼190℃ was 0.196 eV.
葛英淳,黃泰耿 慶一大學校 1997 論文集 Vol.14 No.2
With PATRAN/ABAQUS(standard), FEA(Finite element Analysis) of E-glass/VinyI ester chemical resistant composite tank with holes was performed. The purpose of this investigation was to determine the deformation behavior and structural safety under the maximum storage weight condition of chemical mixtures with 1.3g/cm³of density. Laminated shell element in ABAQUS has applied to calculate the stress and strain for each laminated layer. Maximum failure stress theory and Tsai-Wu failure theory have applied to evaluate the structural safety factor of composite tank. FEA results showed that the large hole is the most weaken area and the minimum structural safety factor is evaluated to be about 4 on a basis of the first ply failure theory.
내식성 복합재구조물 제작용 비닐에스테르 수지의 조성 및 그 특성에 관한 연구
제갈영순 경일대학교 산업기술연구소 1999 産業技術硏究所 論文集 Vol.6 No.-
This paper dealed the studies on the fomulation and properties of vinyl ester resin for chemical resistant composite structures. The chemical structure of vinyl ester, Derakane 510A-40 and its hardener were characterized by H-NMR, ¹³C-NMR and infrared spectroscopies. The Derakane 510A-40 resign was identified to be have the structure of tetrabromobisphenol A epoxy-baed vinylester carrying the enthylenically unsaturated end groups. The spectral analysis on vinylester hardener indicated that is composed of methyl ethyl ketone peroxide and inactive aromatic compounds. The test on the mechanical and thermal properties of cure vinyl ester specimens were also tested. The tensile strength and modules wer 10,300 psi and 480 Ksi, whereas the flexural strength and modulus wer 17,200 psi and 520 Ksi. The heat deflection temperature of cured vinyl ester resin was 107℃.
PCB용 Glass/Epoxy 프리프레그의 경화중 점성거동 연구
諸葛英淳,尹南畇 論文集 1999 論文集 Vol.16 No.2
This paper dealed the studies on the viscosity behaviors of glass/epoxy prepreg for PCB during the cure process. The dynamic scan of glass/epoxy prepreg using DSC showed that the exothermic reaction started at the temperature of 118℃. The peak temperature was 169.7℃ and the total reaction enthalpy (ΔH) was 13.54I/g. The results of ion viscosity behaviors of this prepreg system using dielectrometer exhibited the lowest ioniviscosity at about 115℃, and then the ionic viscosity was gradully increased upto 150℃. This indicated that the cure reaction of this prepreg started at 115℃ and the molecular weight was increased by the accelerated thermal cross-linking reaction.
Yeong-Soon Gal,진성호,Ae-Ran Hyun,박영일,박종욱,임권택,이원철,남미애 한국공업화학회 2008 Journal of Industrial and Engineering Chemistry Vol.14 No.4
The conjugated cyclopolymer, poly(9,9-dipropargylfluorene), was prepared by the ring-forming polymerization of 9,9-dipropargylfluorene by (bicyclo[2.2.1]hepta-2,5-diene)dichloropalladium(II) in high yield. The chemical structure of poly(9,9-dipropargylfluorene) was characterized by such instrumental methods as NMR (1H, 13C), IR, UV–vis spectroscopies, and elemental analysis to have the conjugated polymer backbone bearing fluorene moieties. Poly(9,9-dipropargylfluorene) showed characteristic UV–vis absorption band at 307 and 324 nm and violet-blue PL spectrum at 411 nm, corresponding to a photon energy of 3.01 eV. The cyclic voltamograms of the polymer exhibited reversible electrochemical behaviors between the doped and undoped peaks. It was found that the kinetics of the redox process of polymer is controlled by the diffusion process mixed with the electron transfer process from the experiment of the oxidation current density of polymer vs. the scan rate.
Gal, Yeong-Soon,Jin, Sung-Ho,Park, Jong Wook,Lim, Kwon Taek,Kim, Sang Youl Informa UK (TaylorFrancis) 2015 Molecular Crystals and Liquid Crystals Vol.618 No.1
<P>A new ionic polyacetylene with coumarin moieties was synthesized via the non-catalyst polymerization of 2-ethynylpyridine using 4-bromomethyl-7-methoxycoumarin in high yield. The polymerization proceeded well in homogeneous manner to give 75% of yield without any additional catalyst or initiator. The polymer structure was identified by such various instrumental methods as NMR, IR, and UV-visible spectroscopies to have a conjugated backbone with the designed coumarin groups. The photoluminescence peak was observed at 512nm corresponding to a photon energy of 2.42eV. The cyclovoltamograms of polymer exhibited the electrochemically stable window at the -1.8 approximate to 1.50V region. Oxidation and reduction were started at 0.58 and -0.8V and had stable electrochemical property up to 30 cycles.</P>