메카니즘 FT-IR을 이용하여 연구하였다. 150˚C에서 경화반응이 일어날 경우 반응기간이 증가할 때 에폭시기와 히드록시기는 감소하였고, 에테르기는 증가하였다. ... 이로부터 HQ-PGE는 반응에 참여할 때 사슬 확장제와 반응 가속제로 작용함을 할 수 있었다. 한국재료학회 한국재료학회지 송영욱, 최형기, 심미자, 김상욱 ... bisphenol A (DGEBA)/4, 4' -methylene dianiline(MDA)에 hydroquinonepheny1 glycidy1 ether(HQ-PGE)를 첨가한 계의 경화반응
(MDA)계를 첨가하여 이 계의 경화 반응속도론과 경화반응메카니즘을 시차주사 열분석(DSC)과 적외선 흡수 분광법을 통해 관찰하였다. ... 경화반응속도론으로부터 MN으로 개질된 DGEBA/MDA는 완전히 경화를 이루기 위하여 80˚C로 부터 170˚C까지 30˚C간격으로 경화시킨 시료로 반응메카니즘을 고찰한 결과 PA( ... )-OH(hydroxy1 group)반응이 일어남을 알았다.
본 연구에서는 고령토, 유황, 탄산나트륨, 규석 및 송진을 원료로 하여 군청을 합성하였고, 그 반응메카니즘을 조사하였다. ... 그리고, 녹색군청은 황화나트륨과 NaAISiO4의 반응에 의하여 740˚C부근에서 형성하기 시작하였다. ... 합성 과정에서 발생하는 반응 생성물 및 이들의 구조적 변화는 x선 회절 분석과 Raman Spectrum 분석에 의하여 평가하였다.
The Hydrolysis kinetics of Benzoyl Styrene Derivatives[I]~[IV] was investigated by ultraviolet spectrophotometery in 5% dioxane-H2O at 40℃. The struc..
The hydrolysis reaction kinetics of 2-thienyl chalcone derivatives [II]~[V] was investigated by ultraviolet spectrophotometery in 20% dioxane-H2O at ..
Diazomethane과 phenyl(tribromomethyl) mercury와 dehydroacetic acid와 diazomethane과의 반응은 광화학적 분해 반응에서 생산된 ... Laser flash photolysis 상에서 반응시켰을 때 식품보존제의 발암성이 UV/vis 상에서의 photolysis때보다 크게 나타났다. ... Seyferth 시약인 phenyl(tribromomethyl)mercury 및 diazomethane의 식품보존제인 dehydroacetic acid 및 coumarin과의 발암성과 그 반응기작을
Furfurylidene acetophenone derivatives were synthesis, it was measured that nucleophilic addition made use of UV at a wide pH 1.0~13.0 range in 30% d..
The catalytic activities of several metalloporphyrin, wherein the porphyrins are TPP(5,lO,l5,20-Tetraphenyl-21H,23H-porphyrin) and (p-X)TPP (X =CH3O,..
Benzoyl styrene derivatives were synthesized by Claisen-Schmidt condensation. It was measured that nucleophilic addition of thiourea for benzoyl styr..
The kinetics of the hydrolysis of indolylacrylophenone derivatives(IA) was investigated by ultraviolet spectrophotometry in 30% dioxane-H2O at 25℃ Ra..
The hydrolysis kinetics of 2-furyl chalcone derivatives [I]~[V] was investigated by ultraviolet spectrophotometery in 30% dioxane-H2O at 25℃ and the ..
The kinetics of hydrolysis of cinnamenylisophorone derivatives (rho-H, rho-Br, P-Cl, rho-OCH3) was investigated using ultraviolet spectrophotometry i..
The rate constants of hydrolysis of N-tert-butyl-α-phenylnitrone and its derivatives have been determined by UV spectrophotometry at 25℃ and a rate e..
The rate constants of hydrolysis of α-phenly-N-iso-propylnitrone and its derivatives have been determined by UV spectrophotometry at 25℃ and a rate e..
The kinetic of hydrolysis for cinnamylidene aniline derivatives has been investigated by ultraviolet spectrophotometry in 20% (v/v) dioxane - H2O at ..
The rate constants of the hydrolysis of cinnamanilide derivatives were determined UV spectrometry in H2SO4 (5~20N), NaOH(5~11N) at 50~110℃ and rate e..
The Kinetics of the Hydrolysis of benzalacetophenone derivatives has been investigated by ultraviolet spectrophotometry in 5% dioxane - H2O at 50℃. A..
The rate constants for the addition reaction of thiourea to nitrone derivatives were determind at various pH and reaction rate equation which could b..
The kinetics of the addition of thiourea to cinnamenylisophorone derivatives(X : H, p-Br, p-CH3 m-CH3, p-OCH3) was investigated using ultraviolet spe..
The Kinetics of the addition of benzalacetophenone derivatives was investigated by ultraviolet spectrophotometery in 5% dioxane H2O at 50℃. A rate eq..