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요오드이동중합에 의한 Telechelic Diiodo-poly(VDF-co-HFP)의 합성연구
원종웅,이범재 忠南大學校 産業技術硏究所 2002 산업기술연구논문집 Vol.17 No.2
The structure-controlled α,ω-diiodo-poly(vinyliene fluoride-co-hexafluoropropylene) was polymerized by Iodine Transfer Polymerization(ITP), which in one of the controlled telomerization methods. The molecular weight of the polymer increased linearly with polymerization time and [monomer]/[iodide] ratio and the polymer showed a narrow molecular weight distribution (PDI<1.3). The chain-end structure of α,ω-diiodo-poly(vinyliene fluoride-co-hexafluoropropylene) was consisted of both -CH_2CF_2-I and -CF_2CH_2-I. This difunctional ITP of VDF/HFP was found to show the pseudo-living characteristics, in which molecular weight could be controlled and the functionality was close to 2. This telechelic copolymer with Mn<10,000g/mol can be used as telechelic fluorinated prepolymer after transformation of the chain-end iodo group.
원종웅,임기원,김정우,이범재,조성무,박건유 한국공업화학회 2002 한국공업화학회 연구논문 초록집 Vol.2002 No.0
The well-defined α,ω-diiodo-poly[vinylidene fluoride(VDF)-co-hexafluoropropylene(HFP)] with narrow unimodal molecular weight distribution(PDI=1.05-1.3) was polymerized by Iodine Transfer Polymerization(ITP), which are one of the controlled
원종웅(Jong-ung Won ),최성한(Sung-han Choi),박영철(Young-chul Park) 한국추진공학회 2017 한국추진공학회지 Vol.21 No.2
Environmental problem of the solid propellants is an issue of growing importance in solid rocket. For examples, ammonium perchlorate (AP) as an solid propellants oxidizer could create a poisonous gas and atmospheric pollutions, such as HCl. Among the several oxidizers, N-guanylurea dinitramide (GuDN) is an effective candidate substance for eco-friendly oxidizer, which has high performance, pressure exponent, and eco-friendly smog during combustion for solid propellant of gas generator. In this paper, the theoretical analysis of characteristics as a gas generator propellant, propellant manufacturing processability, propellant hardness properties and combustion characteristics were studied.
금속연료인 Boron-bead 입도에 따른 Fuel-rich 고체 추진제 특성 연구
원종웅(Jongung Won),신경훈(Kyunghoon Shin),최성한(Sunghan Choi),이원복(Wonbok Lee),김준형(Junhyung Kim),황갑성(Gabsun Hwang),박복선(Bocksun Park) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.5
공기흡입형 추진기관의 가스발생기에 사용하기 위한 Fuel-rich 고체 추진제의 특성에 대한 연구를 수행하였다. 일반적인 고체 추진제는 평균 60%이상의 산화제를 포함하는 데, Fuel-rich 고체 추진제를 개발히기 위해 산화제 함량을 30%내외로 낮추고 금속연료 함량을 증가시켰다. 금속연료로 매우 높은 부피당 열량을 가지는 Boron을 사용하였으며, 추진제내에 많은 양의 금속연료를 포함하기 위해 Amorphous Boron Powder를 Bead화하여 추진제에 적용하였다. 본 논문에서는 제조된 Boron-bead의 입도에 따른 Fuel-rich 고체 추진제의 제조 공정성 및 연소속도 특성에 대한 연구를 수행하였다. This is a Template to guide how to prepare the manuscript for submission to the Journal of the Korean Society of Propulsion Engineers.
원종웅(Jongung Won),최성한(Sunghan Choi),이원복(Wonbok Lee),김준형(Junhyung Kim),황갑성(Gabsun Hwang),박복선(Bocksun Park) 한국추진공학회 2014 한국추진공학회 학술대회논문집 Vol.2014 No.12
공기흡입형 추진기관을 위한 연료과농(Fuel-rich) 추진제의 특성에 대한 연구를 수행하였다. 연료과농고체 추진제를 개발히기 위해 금속연료로 매우 높은 부피당 열량을 가지는 붕소(Boron)를 사용하였다. 비정질 붕소(Amorphous Boron Powder)를 입자화(Bead)하여 추진제내에 적용하였으며, 추진제내 금속연료로 알루미늄(Al) 및 마그네슘(Mg)을 적용하여 추진제 연소특성을 확인하였다. 또한, 알루미늄의 입도크기에 따른 추진제 연소특성을 연구하였다. A study of fuel-rich propellant for air-breathing propulsion was performed in this paper. To develop the fuel-rich solid propellant, Very high amount of heat per volume of fuel into the metal having the Boron was used. Amorphous Boron Powder was applied to propellant as beads type and it used to aluminum and magnesium as metal fuel in propellant. And the characteristics of fuel-rich solid propellant according to the aluminum sizes were confirmed.
금속연료인 과립화붕소의 입도에 따른 연료과농 고체 추진제 특성 연구
원종웅(Jongung Won),최성한(Sunghan Choi),이원복(Wonbok Lee),김준형(Junhyung Kim),황갑성(Gabsung Hwang),박복선(Bocksun Park) 한국추진공학회 2014 한국추진공학회지 Vol.18 No.5
A study of gas generator Fuel-Rich propellant for air-breathing propulsion system was performed in this paper. General solid propellant comprises a mean of 60% or more oxidizing agents. but, to develop the fuel-rich solid propellant increased the content of the metal fuel and reduced the content of the oxidizing agents by approximately 30%. Very high amount of heat per volume of fuel into the metal having the Boron was used. Amorphous Boron Powder was applied to propellant as beads type and it allowed to design more amount of metal fuel in the fuel-rich propellant. And the Combustion characteristics and properties of fuel-rich solid propellant according to the Boron-bead sizes were confirmed.