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연속반응기에서 Styrene 과 n - Butylmethacrylate 의 용액 공중합의 속도론
김남석,설수덕 ( Nam Seok Kim,Soo Duk Seul ) 한국공업화학회 1997 공업화학 Vol.8 No.3
스티렌(St)과 n-부틸메타크릴레이트(n-BMA)를 용매인 톨루엔에서 과산화벤조일(BPO)를 개시제로 사용하여 80℃에서 연속반응기를 사용하여 용액공중합을 행하였다. 반응물 부피, 체류시간은 각각 0.6L, 3시간으로 하였다. 단량체 반응성비 r₁(St)과 r₂(BMA)는 Kelen-Tu¨do¨s방법 (또는 Fineman-Ross방법)으로 결정하였다. : r₁=0.75(0.67), r₂=0.61(0.56). 공중합체의 가교정지인자, ψ값은 스티렌의 전체 조성에 대해 0.44∼0.78값을 가지고 공중합체내 스티렌 조성이 증가할수록 ψ값도 증가하고 있다. 스티렌과 부틸메타크릴레이트의 공중합반응은 2차 반응속도식에 따랐으며 시뮬레이션한 전환율과 공중합 속도를 실험결과와 비교하였다. 동적인 정상상태에 도달하는 평균시간은 체류시간의 3.5배였다. Solution copolymerization of Styrene(St) and n-Butylmethacrylate(BMA) was carried out with Benzoylperoxide (BPO) as an initiator in toluene at 80℃ in a continuous stirred tank reactor. Reaction volume and residence time were 0.6 liters, 3 hours respectively. The monomer reactivity ratios, r₁(St) and r₂(BMA) were determined by both the Kelen-Tu¨do¨s method and the Fineman-Ross method; r₁= 0.75(0.67), r₂ = 0.61(0.56). The cross-termination factor, ψ factor of the copolymer over the entire St compositions ranged from 0.44 to 0.78. The ψ factors of St-BMA copolymer increased with increasing St compositions. Our present system showed that the continuous copolymerization of St with BMA followed second-order kinetic behavior. The simulated conversions and copolymerization rates were compared with the experimental results. The average time to reach dynamic steady-state was three times and half of the residence time.
회분식반응기에서 스티렌과 알킬아크릴레이트의 공중합의 속도론
설수덕,김남석,황준호,최경선,강현석 동아대학교 공과대학부설 생산기술연구소 1997 生産技術硏究所硏究論文集 Vol.2 No.1
Stylene(St) with Methyl Acrylate(MA), Ethyl Acrylate(EA), and n-Butyl Acrylate(BA) were carried out with benzoylperoxide(BPO) in touene. The copolymer compositions were determined by Elemental Analyzer(EA). The monomer reactivity ratio, r1 and r2 were determined by both the Kelen-Tu¨do¨s method and Fineman-Ross method. The values of r1 and r2 for each monomer pair were as follows : r1(st)=0.57(0.68), r2(MA)=0.09(0.22). The φ factor of the copolymer over all St compositions ranged from 0.64 to 2.33 and increased with increasing St compositions. The copolymerization rates of each monomer pair were determined.
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.
회분식 반응기에서 메타크릴레이트계의 용액공중합 및 열분해의 반응속도에 관한 연구
김남석,설수덕 東亞大學校 1995 東亞論叢 Vol.32 No.-
Radical copolymerization of methyl metacrylates was carried out in a Batch reactor. Solvent and initator used were toluene and benzoyl peroxide, respectively. Reaction volume was 500 litters, polymerization time 12 hours and polymerization temperature 70~90℃. The copolymerization conversions were analyzed by FT-IR, GPC, DSC and TGA, and confirmed by measuring the solid weights of copolymers obtained after evaporatinf solvent. The monomer reactivity ratios were determined by the Kelen Tudos method.
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.
회분식 반응기에서 α- Methylstyrene과 Acrylonitrile의 공중합과 열분해 속도에 관한 연구
설수덕,김남석 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2
Radical copolymerization of α-methylstyrene With acrylonitrile was carried out in toluene and BPO by a batch reactor. Reaction volume was 0.5 litters, reaction time in a batch reactor 7 hours at 75℃~95℃. The copolymerization conversion were analyzed by GC ad EA, conformed by measuring the solid weights of copolymers obtained after evaporation solvent. The radical copolymerization with propagation and depropagation is presented in order to estimate reactivity ratio(r₁, r₂) and K₁₁(the equilibrium constant for propagation and depropagation) in the copolymerization of α-MS(M₁) and AN(M₂). The value of r₁, r₂, and K₁₁ are found to be 0.1251, 0.0577, and 23.8, respectively. Activity energy of copolymerization and thermal decomposition is 22~30, 52.2㎉/㏖ respectively.