α-셀룰로오즈의 열분해에 관한 연구(Ⅰ) : 산촉매 NaCl의 영향

설수덕,나상도 동아대학교 공과대학부설 생산기술연구소 1996 生産技術硏究所硏究論文集 Vol.1 No.-

The Thermal decomposition of the α-Cellulose and NaCl was a thermal analysis technique in the steam of nitrogen gas with 30ml/min at various heating eates 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 Integral method were consistent with each other very well. 2. The maximum value of heat of decomposition evaluated by DSC method was α-Cellulose/NaCl=90/10. 3. The thermogravimetric trace curve agreed with the theoretical equation.

α-Cellulose / Alkylacrylate의 중합속도에 관한 연구

설수덕,강현석 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.2

Uncatalyzed graft copolymerization of water-soluble monomers such as Acrylic acid(AA), methyl acrylate(MA), ethyl acrylate(EA), and n-butyl acrylate(BA1 was carried out without any usual radical initiator. The kinetics of graft copolymerization used various monomers (AA, MA, EA, BA) and inorganic salts (ZnC1₂, MgCl₂, NaCl). The temperature was varied from 60 to 80˚C. The results are as follows : 1. For constant concentration of inorganic salts, the value of graft yield and graft efficient was EA > MA > BA with various monomer. 2. The rate of graft polymerization R_(G) can be expressed as R_(G)=2.94×10^(-5)[M]^(2.34)[I]^(1.58)exp(-4.969/RT) 3. For constant concentration of inorganic salts, the initial decomposition temperature was EA > MA > BA > AA, and the maximum decomposition temperature was MA > BA > AA using thermal analysis

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.

제지슬럿지와 LDPS수지 혼합물의 열분해에 관한 연구

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.

p-톨루엔 술폰산의 염소화 반응에 관한 연구

설수덕,신동욱,표명수 동아대학교 환경문제연구소 1997 硏究報告 Vol.20 No.1

The chlorination of PTS was reacted at temperature 45~85℃, chlorine flow rate 158~475 cc/min, respectively, and thermal decomposed at flow rate of nitrogen 30 cc/min and heating rate(B) 4~20℃/min, respectively, in a batch reactor. Some conclusions are as follows : 1. The maximum conversion of PTSCI mixture was 81%, the optimum reaction temperature and chlorine flow rate were 65℃ and 316.5 cc/min, respectively. 2. The reaction activation energy of PTSCI and OTSCI were 2,423 kcal/mol and 2,125 kcal/mol. And the reaction order was 0.4 3. The activation energy for decomposition of the PTSCI mixture was 21.4kcal/mol and the reaction was first order. 4. The PTSCI mixture was the best for thermal degradation that was reacted at reaction temperature and chlorine volume were 65℃ and 316.5 cc/min, respectively.

Poly(Acrylonitrile-EPDM-4-Chlorostyrene)과 스틸렌공중합체의 열분해에 관한 연구

설수덕,손진언,김남석,신봉섭 동아대학교 공과대학 부설 한국자원개발연구소 1992 硏究報告 Vol.16 No.2

The thermal degradation, flame retardance, light resistance and weatherability of AECS compared with those of Poly(acrylonitrile-butadiene-styrene) (ABS), Poly(α-methylstyrene-acrylonitrile) (SAN), Poly(acrylonitrile-EPDM-styrene) (AES). The values of activation energies of thermal degradation determined by Thermogravimetry and Differential Scanning Colorietry method of related polymers was in the order of AECS(49∼51㎉/㏖) > AES(46∼50㎉/㏖)> SAN(45∼49㎉/㏖)> ABS(44∼46 ㎉/㏖) and in the light resistance and weatherability increased in the order of ABS > SAN > AES> AECS. The thermal degradation of AECS was considered to be carried out by main chain scission at reaction temperature below 400℃.

환경호르몬의 최소화를 위한 스티렌계 단일 또는 공중합체의 광 및 열분해 속도론

설수덕 동아대학교 환경문제연구소 1999 硏究報告 Vol.22 No.1

The photodecomposition of polystyrene(PS), poly(methylstyrene-co-acrylonitrile)(SAN) and poly(acrylonitrile-butadiene styrene)(ABS) were carried out using UV crosslinker in the stream of nitrogen at isothermal temperature range from 25 to 45℃, and thermal decomposition of PS, SAN and ABS were carried out using differential scanning calorimetry(DSC) in the stream nitrogen with 10㎖/min at heating rate from 4 to 20℃/min. The value of PS, SAN and ABS activation energies of photodecomposition determined by isothermal method were respectively 30.84 ㎉/㏖, 20.30 ㎉/㏖, 10.73㎉/㏖. The value of PS, SAN and ABS activation energies of thermal decomposition determined by Kissinger method were respectively 29.41 ㎉/㏖, 50.67 ㎉/㏖, 37.52㎉/㏖, and determined DSC method were respectively 26.02 ㎉/㏖, 45.80 ㎉/㏖, and 12.90 ㎉/㏖. The value of activation energy of PS at the low isothermal temperature range was appeared high in comparison with PS copolymer but the value of activation energy of SAN at the high dynamic temperature range (below 500℃) was appeared high in comparison with PS and ABS. PS and PS copolymer by the analysis of FT-IR were decomposed by main chain scission in the stream of nitrogen.

섬유용 하지유연제의 물성에 관한 연구

설수덕,이순재 동아대학교 생산기술연구소 2000 生産技術硏究所硏究論文集 Vol.5 No.1

Grounding agent is produced of blend both anion surface active agent and nonion surface active agent in the lubricant mixed by oleic acid and diethanol amine. Conversion ratio is proportionate to the reaction temperature and the composition of diethanol amine in lubricant mixture and it is the highest to 98% that the mol ratio of oleic acid : diethanol amine is to 1:3. The diminishing ratio of raw silk has no relation with the composition of bath anion a nd nonion surface active agent in the material test of grounding agent. It is excellent when the mol ratio of oleic acid and diethanol amine is the same mol ratio. Whiteness ratio is nearly constant regardless the composition of lubricant. The size of strength and elongation and cutting numbers have the inverse proportion to the composition of diethanol amine in lubricant. Modulus ratio has no relation with the density of grounding agent and is the best in 2.5%.

회분식 반응기에서 무수말레인산과 알킬메타크릴레이트의 공중합속도론

설수덕,황준호,김남석 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.2

Radical copolymerization of maleic anhydride with methylmethacrylate, ethyl methacrylate was carried out in a Batch reactor. Solvent and initiator used were n,n-dimethylformamide and AIBN, repectavely. Reaction volume was 500 litters, polymerization time 10 hours and polymerization temperature 60∼80℃. The copolymerization conversions were analyzed by FT-IR, EA, GPC, and confirmed by measuring the solid weights of copplymers obtained after evaporating solvent. The monomer reactivity ratio were determined by the Kelen-T ds method.

α-셀로로오즈와 AN의 Graft공중합체의 열분해 특성

설수덕,이동호 동아대학교 공과대학부설 생산기술연구소 1998 生産技術硏究所硏究論文集 Vol.3 No.2

Thermal decomposition mechanism and kinectics of α-cellulose on Grafting of Acrylonitrile onto partially α-Cellulose were obtained using thermal analysis, pyrolysis gas chromatography and fourier transform-infrared spectrometer method under dynamic and isothermal condition in the stream of nitrogen. 1. the values of activation energy evaluated by Friedman's and Ozawa's method were consistent with each other very well. it was possible to determine the thermal stability of samples from these results. 2. the optimum thermal stabilization in Acrylonitrile-grafted α-cellulose was obtained in composition of 5∼10% AN.