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Poly(Epichlorohydrin-CO-1,2-Epoxyhexane) - a promising precursor for an energetic azido polymer for cast-cure processing

Poly(Ech-CO-1,2-Epoxyhexane) diol - a promising precursor for an energetic azido polymer for cast-cure processing
: Hafner, Sven; Keicher, Thomas; Klapötke, Thomas M.

Fulltext urn:nbn:de:0011-n-4024188 (210 KByte PDF)
MD5 Fingerprint: 31b040e8f225a43f39d93cbd545a9e78
Created on: 15.7.2016

Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Energetic Materials. Synthesis, Characterization, Processing : 47th International Annual Conference of ICT, June 28 to July 1, 2016, Karlsruhe, Germany, Proceedings
Pfinztal: Fraunhofer ICT, 2016
10 pp.
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <47, 2016, Karlsruhe>
Conference Paper, Electronic Publication
Fraunhofer ICT ()

A copolymer of epichlorohydrin (ECH) and 1,2-epoxyhexane (EpH) has been synthesized via cationic ring-opening polymerization using BF3xTHF as a catalyst and 1,4-butanediol (BDO) as an initiator. The structure of the resulting PECH copolymer was confirmed by NMR- and IR-spectroscopic methods. The molecular weight distribution was determined by GPC, showing a number average weight of 1607 g/mol. The introduction of n-butyl substituted units into the polyether backbone chain lowers the glass transition temperature, which was confirmed by thermal analysis (DSC-Tg), and also lowers the viscosity of the polymer significantly compared to PECH in the same molecular weight range. A subsequent azidation of the polymer should lead to an energetic prepolymer with interesting properties for cast-cure processing of composite propellants.