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왕석주,설수덕 ( Seok Ju Wang,Soo Duk Seul ) 한국공업화학회 1997 응용화학 Vol.1 No.1
The kinetics of thermal degradation on blend of paper sludge and styrene copolymers. The thermal analysis at various heating rate, pyrolysis gas chromatography and infra-red spectroscopy at isothermal temperature. The values of activation energy were 23-64 ㎉/㏖ by derivative method and 18-61 ㎉/㏖ by integral method. The themal degradation of PS/paper sludge was main chain scission, ABS and SAN/paper sludge were random chain scission.
설수덕,왕석주,장성호 동아대학교 환경문제연구소 1994 硏究報告 Vol.17 No.2
The thermal decomposition of the sludge with Poly(acryloniti1e-butadiene-styrene) and Poly(styrene-co-acrylonitrile) were using a thermal analysis techniques in the stream of nitrogen gas of 30ml/min at various heating rates from 4 to 20℃/min. The mathematical, Derivative and Integral method were used to obtained values of activation energy of decomposition reaction. 1. The values of activation energy evaluated by Derivative and Intergral method were consistent with each other very well. 2. The maximum value of heat of decomposition evaluated by DSC method were 10, 120 cal/g at weight ratio of sludge/ABS=20/80 and 10, 500cal/g at weight ratio of sludge/SAN = 20/80. 3. The thermogravimetric trace curve agreed with the theoretical equation.
설수덕,왕석주 동아대학교 공과대학 부설 한국자원개발연구소 1995 硏究報告 Vol.19 No.2
The thermal decomposition of the sludge and LDPS resin were heating rates from 4 to 20℃/min. The Derivative and Integral method were used to obtained values of activation energy of decomposition reaction. 1. The values of activation energy evaluated by Derivative and Intergral method were consistent with each other very well. 2. The maximum value of heat of decomposition evaluated by DSC method was 9,550cal/g at weight ratio of sludge/LDPS=20/80.
연속교반탱크반응기에 의한 α-SAN의 용액공중합과 열분해에 관한 연구
설수덕,김남석,왕석주 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.1
Thermal decomposition of the copolymers of α-methylstyrene(α-MS) with Acrylonitrile(AN) were investigated. The copolymers were obtained in a continuous stirred tank reactor(CSTR) using toluene and benzoyl peroxide, as solvent and initiator, respectively, at 75℃. The thermal decomposition followed the first order kinetics. Otherwise the copolymerization in a CSTR followed the second order kinetics. The activation energies of copolymerization and thermal decomposition are 17.9㎉/㏖, 17~58㎉/㏖, respectively, in a CSTR.
젤라틴에 메틸메타크릴레이트로 유화중합시킨 그라프트 폴리머의 열분해에 관한 연구
설수덕,박찬헌,신은주,왕석주 동아대학교 공과대학 부설 한국자원개발연구소 1994 硏究報告 Vol.18 No.2
Emulsion graft copolymerization with sodium lauryl sulfate(SLS) of methyl methacrylate(MMA) onto gelatin was carried out in aqueous solution by potassium persulfate(KPS) as an initiator and thermal degradation of graft copolymer was stuied using a dynamic and isothermal thermogravimetry in the stream of nitrogen gas with 60㎖/min at various heating rate from 4 to 20℃/min, and various time at 200℃ The optimun concentration on emulsion graft copolymerization of KPS, gelatin, MMA, reaction temperature and time were 12×10^(-4)㏖/ℓ, 6g, 6.3×10^(-1)㏖/ℓ, 65℃ and 4hours, respectively. The activation energy of polymerization was 17.8 ㎉/㏖. The range of activation energies of decomposition obtained using Friedman's method was between49~57 ㎉/㏖ and using Ozawa's method was between 44~52㎉/㏖. The thermal degradation of gelatin-g-PMMA is likely due to decomposition of PMMA branches dominantely.
DSC법에 대한 제지슬럿지와 스티렌 공중합체의 열분해속도
설수덕,왕석주,이동호 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2
The kinetics of thermal degradation on blend of the paper sludge and waste styrene copolymer, such as high density polystyrene(HDPA), low density polystyrene (LDPS), poly(styrene-co-acrylonitrile)(SAN), poly(acrylonitrile-butadiene-styrene)(ABS) were anaryzed using the thermal analysis, pyrolysis gas chromatography with the stream of nitrogen gas(30ml/min) and infra-red spectroscopy at isothermal temperature(200, 250, 300, 350℃). 1. The values of apparent activation energy evaluated by DTA method was consistent with eath other very well. 2. The maximum value of heat of decomposition evaluated by DSC method was 80% ABS and 20% paper sludge(11,120cal/g) 3. The thermal degradation of PS/sludge was considered to be carried out by the main chain scission and ABS/sludge, SAN/sludge were to be carried out by the randim chain scission over 300℃. The thermogravimetric trace curve agreed with the theoretical equation.GC
폐 스티렌계수지와 제지슬럿지 Blend 의 열분해에 관한 연구
설수덕,왕석주,나상도,김남석 한국고무학회 1995 엘라스토머 및 콤포지트 Vol.30 No.2
The thermal decomposition of the paper sludge with poly(acrylonitrile-butadiene-styrene) was using a thermal analysis techniques in the stream of nitrogen gas of 30㎖/min at various heating rates from 4 to 20℃/min. The mathmatical, derivative and integral method were used to obtain values of activation energy of decomposition reaction. 1. The values of activation energy evaluated by derivative and Intergral method were consistent with each other very well. 2. The maximum value of heat of decomposition evaluated by DSC method was 10.120㎈/g at weight ratio of paper sludge/ABS=20/80. 3. The thermogravimetric trace curve agreed with the theoretical equation.