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Nylon Monofils 釣系의 破斷張力과 伸張率에 對하여
朴元千,曺圭大 제주대학교 1969 논문집 Vol.1 No.-
Generally W hook line in several kinds of makers is strong, while L hook line is less strong than the others in both dry and wet condition. Elongation are the greatest in L hook line, as compared with the others. 1. Nylon monofils hook Line made in Korea vary in the formula diameter according to number of hook line and that difference is about 0.04mm∼0.06mm. 2. Value of breaking strength T feels in proportion as increase of number of hook line. Value of mean breaking strength in dry condition are increased about 0.30kg-1.50kg than that of wet condition in without knot. In difference value of mean breaking strength among three makers are 0.31∼8.4kg in dry condition and 0.15kg-10.76kg in wet condition. 3. Generally, value of standard devation σ are according to increase of hook line numbers both dry and wet condition. In dry condition, standard devation σ makes minimum 0.063 in M3 and maximum 1.238 in W26, in wet condition it shows minimum 0.000 in W3 and maximum 1.093 in L26. 4. In dry condition, value of coafficient C. V. was minimum 1.525 in W6 and maximum 8.98 in M6, in wet condition it was maximum 14.537 in W6 and minimum 0.00 in W3. Generally, having big value of and small value of this C.V. is saying that hook line are uneven and even respectively in quality and size. 5. Elongation ratio are minimum at all number of hook line less than 10%-20% loading, that as increasing more than 90% loading are break in quickly increase. Elongation ratio is maximum 65.0% in L26 and minimum 24.0% in 3L.
Highly Active Catalyst of Nickel Sulfate Supported on Titania for Ethylene Dimerization
손종락,박원천,Son, Jong Rak,Park, Won Cheon Korean Chemical Society 2001 Bulletin of the Korean Chemical Society Vol.22 No.12
A series of catalysts, NiSO4/TiO2, for ethylene dimerization was prepared by the impregnation method using aqueous solution of nickel sulfate. On the basis of the results obtained from X-ray diffraction, the addition of NiSO4 shifted the transition of TiO2 from the anatase to the rutile phase toward higher temperatures due to the interaction between NiSO4 and TiO2. Nickel sulfate supported on titania was found to be very active even at room temperature. The high catalytic activity of NiSO4/TiO2 closely correlated with the increase of acidity and acid strength due to the addition of NiSO4. It is suggested that the active sites responsible for ethylene dimerization consist of low valent nickel, Ni+, with an acid.
에틸렌 이량화를 위한 Silica 에 담지된 황산니켈 촉매의 특성과 활성
손종락,박원천,이시훈 한국공업화학회 1998 응용화학 Vol.2 No.2
Ethylene dimerization is an important reation and worthy of study. Nickel oxide on silica or silica - alumina is an effective catalyst for ethylene dimerization and n-butene isomerization at room temperature. As an extention of the study on the ethylene dimerization, we have prepared a new catalyst of nickel sulfate supported on silica which is active for ethylene dimerization even at room temperature.