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Polyalkyl methacrylate의 Blend의 劣力에 關한 硏究
朴相郁,尹漢洙,薛秀德 부산대학교 공과대학 1986 硏究報告 Vol.32 No.-
The thermal decomposition of polymer mixtures such as polymethyl methacrylate and polyethyl methancrylate, and polymethyl methacrylate and polybutyl methacrylate was studied using a dynamic thermogravimetry in the stream of nitrogen gas with 50㎖/min at various heating rate from 1 to 20℃/min, and various heating temperature from 200 to 450℃. Friedman mathematical method was used to obtain the values of activation energy, reaction rate and frequency factor. The value of the activation energy of mixture of PMMA-PEMA was in the range of 36-43 kcal/mol and that of mixture of PMMA-PBMA, 33-38kcal/mol. The value of the activation energy decreased as the increase of the amount of PEMA and PBMA in the mixture. The value of the activation energy of the polymer mixture obeyed the addition rule. The thermogravimetric trace curve agreed with the theoretical equation.
朴相郁,朴文基,洪鍾泰 부산대학교 공과대학 1991 工大論文集 Vol.42 No.-
The rates of absorption of carbon dioxide into water were measured in a stirred cell with plane interface in the presence of fine solids such as activated carbon, white carbon and fused alumina at 25℃ and 1 atm. Experiments for slurries of activated carbon and white carbon showed that the absorption rates increase significantly, which could be explained by the adsorption capacity of these fine particle. Meanwhile, the absorption rates for slurry of fused alumina without adsorption capacity of dissolved gas in slurry were less than those for water. The enhancement of gas absorption into slurries of activated carbon and white carbon could be explained by the diffusion equation based on penetration theory of dissolved gas.