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Synthesis and Characterization of Alkoxy and Alkylamino GAP Copolymer for Energetic Thermoplastic Elastomer (ETPE)

에너지화 열가소성 탄성체에 사용될 수 있는 알콕시 계열과 알킬 아민 계열 GAP Copolymer의 합성 및 분석

Lim, Minkyung;Jang, Yoorim;Kim, Hancheul;Rhee, Hakjune;Noh, Sitae
임민경;장유림;김한철;이학준;노시태

  • Received : 2018.11.30
  • Accepted : 2018.12.06
  • Published : 2019.02.10

Abstract

In this study, synthetic methods and physical properties for a new class of glycidyl azide polymer (GAP) were investigated for energetic thermoplastic elastomers (ETPE). Four kinds of GAP copolymer polyols were synthesized by introducing nucleophiles such as azide, alkoxide and alkyl amine into poly(epichlorohydrin) (PECH). The GAP copolymer synthetic reaction can be evaluated as an environmental benign and efficient synthetic method due to the simultaneous one-step reaction using two kinds of nucleophiles and the complete consumption of sodium azide. The relative stoichiometric substitution ratio analysis and the progress of reaction were checked and monitored by inverse gated decoupled $^{13}C$ NMR and Fourier transform infrared (FT-IR) spectroscopy. The glass transition temperature and molecular weight were measured by differential scanning calorimetry (DSC) and gel permeation chromatography (GPC) analysis. The synthesized poly($GA_{0.8}-butoxide_{0.2}$), poly($GA_{0.7}-n-butylamine_{0.3}$), poly($GA_{0.7}-dipropylamine_{0.3}$) and poly($GA_{0.7}-morpholine_{0.3}$) had a glass transition temperature ranged from -39 to $-26^{\circ}C$.

Keywords

Solid propellant;Glycidyl azide polymer;Glycidyl azide polymer copolymer;Poly(epichlorohydrin);Energetic thermoplastic elastomer

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Acknowledgement

Supported by : 방위사업청