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N-Vinylphthalimidine의 혼성중합 반응성 연구
조성휴,조병욱 조선대학교 생산기술연구소 1978 生産技術硏究 Vol.1978 No.-
The polymerization and copolymerization of N-vinyl phthalimidine were investigated. Polymerization was carried out in the presence of radical or cationic initiators. It was found that polyrner izabilrtyl with 'cationic initiators was larger than that with radical ones. The resulting polymers had a softening point in the range of 160∼180℃, the reduced viscosity being small. Copolymerization with acrylonitrile was carried out in dimethylformamide by radical initiator. The monomer reactivity ratios and Alfrey-Price Q and e values calculatcd from the copolymerization data of the monomer (M₁) and acrylonitrile (M₂) were r₁,= (0.04, r₂= 0.23, Q₁=O.35, and e₁= -1. 80.
시멘트클링커 燒成 킬른用 耐火練亙의 製造에 關한 硏究(I)
趙誠烋,宋連浩,權圭赫,金崧平,申大允 조선대학교 생산기술연구소 1980 生産技術硏究 Vol.1980 No.-
Experimental works on the production of magnesium oxide with fast sedimentation velocity and low water content have been conducted by using sea water and dolomite. Rate equation on reaction of solution hold PH9∼11.5 in airblowing system, was obtained. The sedimentation velocity of magnesium oxide was found to be decrease with the period of agitation and reaction temperature.
굼벵이와 누에 번데기의 아미노산 및 지방산 조성에 대한 연구
조성휴,양성훈,차월석 조선대학교 생산기술연구소 1983 生産技術硏究 Vol.1983 No.-
Physical and chemical properties, fatty acid compositions and amino acid compositions of the white grub (Mimela lucidula) oil and the chrysalis of silk worm (Bombix mory) oil were investigated by a gas chromatograph and an amino acid auto analyzer. The results were as follows. 1. White grub oil had refractive index 1.4620, smoke point 170℃, iodine value 116.5, saponification value 183 and acid value 3.4 in its physical and chemical properties, and in the case of chrysalis of silk worm it had refractive index 1.4720, smoke point 165℃, iodine value 127.6, saponification value 190 and acid value 4.3, as the results, both oil would be semidrying oil, higher unsaturated fatty acid. 2. The contents of crude fat were 2.25% in white grub and 16.75% in chrysalis of silk worm, and the crude protein contents 10.80% in white grub and 21.23% in chrysalis of silk worm 3. Fatty acid compositions of white grub oil identified by a gas chromatograph were 33.10% of oleic acid, 29.47% linolenic acid and so on, and in chrysalis of silk worm, the compositions were 32.20% of oleic acid, 30.46% of linolenic acid and so on. 4. Total amounts of amino acid were 47,090㎎/100g in white grub, the compositions were 7,7l0㎎/100g of glutamic acid and so on, and in chrysalis of silk worm 41,580㎎/100g, and the compositions were 5, 450㎎/100g of glutamic acid and so on. 5. Total amounts of essential amino acid were 2,065㎎/gN in white grub and 2,610㎎/gN in chrysalis of silk worm.
조성휴,박기주,송연호,권규혁,최재곤,정재은 조선대학교 생산기술연구소 1987 生産技術硏究 Vol.9 No.1
This report describes the synthesis and thermotropic behaviors of aromatic polyesters with the following structure; The aromatic polyesters were prepared from 1, 4-cyclohexane dicarboxylic acid, 2,5-pyridine dicarboxylic acid and various dials such as bromohydroquinone, chlorohydroquinone and 1, 4-dihydroxy naphthalene ◁화학식 삽입▷ (원문을 참조하세요) In order to examine the thermotropic properties of polymers, a differential scanning calorimeter(DSC), and a Fisher-Johns M.P. apparatus and a cross-polarizing microscope equipped with a hot-stage were used. When these polymers were examined on the cross-polarizing microscope, almost of Polymers I and II exhibited nematic behaviors. Melting temperature (T_(m)) of the each polymer with X=1 was lower than T_(m) of the polymers with X=0. The mesophase temperature range (△T) of the Polymer I and n were quite broad (△T ; 90℃~159℃) and these polymers revealed enantiotropic liquid crystal phase.
Polymethylene Spacer를 갖는 Liquid Crystal Polyester와 Poly(tetramethyl disiloxane)과의 Block 혼성중합
趙誠烋,文源,兪鐘善 조선대학교 생산기술연구소 1986 生産技術硏究 Vol.8 No.2
The block copolymer with liquid crystalline polymer (M ̄n ; 6,500) and oligosiloxane (M ̄n ; 600) was prepared. The thermal and mesomorphic properties of the polymer were investigated by a differential scanning calorimeter (DSC), an X-ray diffractometer, and a polarizing microscope. I) By the results of IR spectrum and inherent viscosity, it was revealed that this block copolymer was formed from the two blocks ; high crystalline liquid crystal block and high flexible siloxane block. II) From the X-ray diffractogram and the optical texture observation, this block copolymer showed on enantiotropic nematic liquid crystal behavior. III) The mesophase temperature range (ΔT) of the block copolymer was broader than that of the liquid crystalline polymer, whereas the thermal stability of the block copolymer was lower than that of the liquid crystal. It could be explained that the cligosiloxane block in the copolymer forms liquid crystal domain on the liquid crystal block more easily and maintain its flexibility even in the block polymer.
N-Vinyl Phthalimidine과 ㅡMaleic Anhydride의 Copolymerization Kinetics에 관한 연구
權圭赫,曺秉旭,趙誠烋 朝鮮大學校 1976 綜合論文集 Vol.1976 No.-
The preparation and copolymerization of N-vinyl phthalimidine have been investigated. The monomer was prepared by dehydrochlorination of N-(β-chloroethyl) phthalimidine. Polymerization was carried out in the presence of radical initiator in solution. Copolymerization with maleic anhydride was carried out in acetone by benzoyl peroxide. It was found that the component of the copolymer is alternating form. The monomer reactivity ratios calculated from the copolymerization data of N-vinylphth-alimidine (M1) and maleic anhydride (M2) were r₁=0.035, r₂=0.001. (insolvent as acetone.)
Iodochlorohydroxyquinoline에 依한 Mo(VI)의 吸光度 定量에 關한 硏究
趙誠烋,金永洙,鄭鍾南 조선대학교 생산기술연구소 1978 生産技術硏究 Vol.1978 No.-
This complex is soluble in CHCl₃but insoluble in Water. It was observed that the maximum complex formation and extration were performed below PH-4.5. The extraction needs more than 3 minutes. From these results the procedure was established as follows; To chelate solution containing 5 to 55 of Mo(VI) and 5㎖ of hydrochloric acid-sodium acetate buffer solution and adjust the pH to 2. O. Dilute the Solution to 25㎖ with distilled water and transfer into a separatory funnel. Add lO㎖ of 2.5m M. CHCl₃solution and shake for 5 minutes. Separate the CHCl₃phase and measure the absorbance at 394 nm against a reagent blank. The chelate solution of calibration curve was linear in the range of to 55 ppm Mo(VI) in a CHCl₃solution. The effect of 15 ions was studied and if was found that the tolerable amount of these ions was considerably high except Sn(II), V(V) and Fe(III).
趙誠烋,曺秉旭 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-
The free radical copolymerization of N-vinyl phthalimdine and maleic anhydride was conducted in dimethyl formamide using benzoyl peroxide as an initiator. Copolymers formed were found to be consisted of the two monomer units in 1:1 mole ratio. Morever, copolymerization rate was the maximum when the feed composition was 1:1 in mole ratio. Activation energy of the copolymerization was found to be 4.1 kcal/mole. Thermal and solubility behaviers of the copolymer were also examined.