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박홍수,박석환,Park, Hong Soo,Park, Suk Whan 대한자원환경지질학회 1989 자원환경지질 Vol.22 No.2
In order to make economic and geological evaluation of coal in Korea, proximate and ultimate analyses were carried out as well as coal petrological studies such as maceral analyses, vitrinite reflectance and sporinite fluorescence measurement. The coeffcient of correlation between each factor of both conventional utilization and coal petrological parameters were studied as in Table 5 and 6. Their conclusions were as follow: (1) for anthracite, the good parameters of coal rank are mean vitrinite reflectance, carbon content, hydrogen content and H/C atomic ratio: (2) for brown coal and sub-bituminous coal, the good parameters of coal rank are carbon content, calorific value, moisture content, hydrogen content, oxygen content and O/C atomic ratio as well as vitrinite reflectance and sporinite fluorescence. An attempt is made to infer the coalforming environment by utilization of coal petrological analyses and to make comparison of coal analyses with proximate and ultimate analyses throughout the island arc region including Japan, Philippine and Indonesia and continental region including USA, Canada and Australia. As a result, meceral composition of Paleozoic and Mesozoic anthracite are similar to that of the Paleozoic continental coals, which were formed under dry conditions or low water table, but the coalification degree suddenly increased during Daebo orogeny (middle Jurassic to lower Cretaceous). The Tertiary coal resembles those of Tertiary island arc region coal characterized by higher calorific value, volatile matter content and H/C atomic ratio and by the formation of coal under wet conditions or higher water table.
폴리에스테르/폴리락톤 폴리올과 TDI-Isocyanurate에 의한 폴리우레탄 도료의 제조 및 경화거동
박홍수,최용호,김태옥,신판우 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6
Polyester/polylactone polyols with of without benzoic acid unit were synthesized by polycondensation of polycaprolactone 0201, trimethylolpropane, adipic acid, and benzoic acid. Then, two-packaged polyurethane coatings with three dimensional network structure were prepared by curing the produced polyols with TDI-isocyanurate at ambient temperature. Various tests on the coating properties of the prepared coatings showed a remarkable improvement in the physical properties. The introduction of polycaprolactone 0201 as diol in the polyurethane coatings improved the cross hatch adhesion, flexibility, impact resistance, and hydrocarbon resistance of coatings. Changes in the drying and curing behavior with the contents of benzoic acid suggest that they have reasonable coating properties, such as drying time of 2 to 4 hours and pot-life time of 18 to 39 hours.