Abstract
An energetic binder was synthesized through ring opening copolymerization of glycidyl nitrate (GLYN) with polycaprolactone (PCL) as a macroinitiator to form tri-block copolymer PGN-PCL-PGN. Effect of monomer concentration, catalyst, reaction time and solvent was investigated in polymerization. Resulting tri-block copolymer was characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The DSC result shows that glass transition temperature of tri-block copolymer (Tg=−56.2 °C) is lower than PGN (Tg=−35 °C). In optimal condition, the Mw of this polymer was obtained 2900 g/mol.
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