Copolymers based on GAP and 1, 2‐Epoxyhexane as Promising Prepolymers for Energetic Binder Systems. Issue 2 (28th November 2017)

• Record Type: Journal Article
• Authors: Hafner, Sven; Keicher, Thomas; Klapötke, Thomas M.
• Is Part Of: Propellants, explosives, pyrotechnics. Volume 43:Issue 2(2018)
• Page Start: 126
• Page End: 135
• Publication Date: 2017-11-28
• Subjects: GAP -- Energetic polymer -- Copolymer -- Internal plasticizer; Propellants -- Periodicals; Explosives -- Periodicals; 662.2
• DOI: 10.1002/prep.201700198
• Languages: English
• ISSNs: 0721-3115

Abstract

Abstract: Copolymers of epichlorohydrin (ECH) and 1, 2‐epoxyhexane (EpH) have been synthesized via cationic ring‐opening polymerization using BF3 ×THF as a catalyst. Structures of the resulting polymers have been confirmed by IR and NMR spectroscopy and GPC. In a subsequent reaction with NaN3 in DMSO, the halogenated precursors were completely azidated, which was confirmed by the same spectroscopic methods. The introduced pendant n ‐butyl chains act as an internal plasticizer by lowering the glass transition temperature (Tg ) of the copolymers compared to the reference compound glycidyl azide polymer (GAP). Compared to GAP in a similar molecular weight range, the copolymers also showed reduced viscosity. These properties make the described copolymers interesting candidates for use as energetic binders in cast‐cure applications. Abstract :