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왕석주,이초영,박형호,Wang, Seok-Joo,Lee, Cho-Young,Park, Hyung-Ho Materials Research Society of Korea 2008 한국재료학회지 Vol.18 No.9
The effect of silver nanoparticles (NPs) incorporation on the electronic properties of poly (3, 4-ethylenedioxythiphene) : poly(styrenesulfonate) (PEDOT : PSS) films was investigated. The surface of silver NPs was stabilized with trisodium citrate to control the size of silver NPs and prevent their aggregation. We obtained ca. 5 nm sized silver NPs and dispersed NPs in PEDOT : PSS solution. Sheet resistance, surface morphology, bonding state, and work function values of the PEDOT : PSS films were modified by silver NPs incorporation as well as annealing temperature. Sodium in silver NPs solution could lead to a decrease of work function of PEDOT : PSS; however, large content of silver NPs have an effect on the increase in work function, resulting from charge localization on the silver NPs and a decrease in the number of charge-trapping-related defects by chemical bond formation.
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,이내우 한국공업화학회 1998 응용화학 Vol.2 No.2
The thermal decomposition of low density polyethylene(LDPE) arts 25%∼48% chlorinated(CPE) were studied using a dynamic thermogravimetry in the stream of nitrogen gas with 20㎖/min. The mathmatic method, differential and Integral method were used to obtain value of activation by the above methods agree with each other very wall. The maximum average activation energy calculated was 78.1㎉/mol. The thermal decomposition of LDPE and CPE were considered to be carried out by main chain scission and the thermogravimetric trace curve agree with the theoretical equation.
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.
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.