Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Synthesis of Poly(glycidyl azide-co-glycidyl ferrocenyl ether)

Poly(glycidyl azide-co-glycidyl ferrocenyl ether)의 합성

  • Jung, Haeji (The 4th Research and Development Institute, Agency for Defense Development)
  • 정해지 (국방과학연구소 제4기술연구본부)
  • Received : 2018.09.19
  • Accepted : 2018.12.21
  • Published : 2019.02.05
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Abstract

Ferrocene and ferrocene derivatives have been widely used as a burning rate catalyst for composite solid propellants. However, its tendency to migrate through the propellant grain and to crystallize at the surface changes the composition of propellant which results in unpredictable burning rate. To overcome the weakness of ferrocene catalyst, we designed a polymer containing ferrocene, poly(glycidyl azide-co-glycidyl ferrocenyl ether) (GAFP). GAFPs were synthesized from poly(epichlorohydrin-co-glycidyl ferrocenyl ether) (PEGF) which has ferrocenyl ethers in its pendant groups. The structures of GAFPs were confirmed by FT-IR, $^1H$ and $^{13}C$ NMR spectral analyses. Thermal properties of the GAFPs were evaluated using differential scanning calorimeter (DSC). As the contents of ferrocene increased, the glass transition temperature ($T_g$) of the GAFPs shifted to a higher temperature, and the decomposition temperature ($T_d$) decreased because the ferrocene worked as a burning rate catalyst.

Keywords

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Fig. 1. Structural formula of Catocene, Butacene and GAFP

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Fig. 2. Synthesis of GAFP from PECH

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Fig. 3. FT-IR spectra of PECH and 1a-c

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Fig. 4. 1H NMR spectra of PECH and 1a-c(in CDCl3)

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Fig. 5. 13C NMR spectra of PECH and 1a-c(in CDCl3)

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Fig. 6. FT-IR spectra of 2a-c

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Fig. 7. 1H and 13C NMR spectra of 2a-c(in CDCl3)

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Fig. 8. DSC thermogram for 2a-c

Table 1. Reaction conditions and results for synthesis of PEGFs

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Table 2. Synthesis of GAFPs(2a-c)

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Table 3. Molecular weights of synthesized polymers

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