Synthesis and characterization of PGN-PTHF-PGN as a new triblock copolymer

A new energetic triblock copolymer of glycidyl nitrate was synthesis using polytetrahydrofuran (PTHF) as macro initiator in cationic ring opening polymerization of glycidyl nitrate in the presence of borontrifluoride etherate (BF3-etherate) as catalyst. The synthesized copolymer exhibited the characteristics of an energeticthermo plastic elastomer. The formation of PGN-PTHF-PGN tribolck copolymer was verified by IR, 1HNMR and gel permeation chromatography (GPC). Thermal behavior of corresponding polymer was studied by differential scanning calorimetry (DSC). The results showed that PGN-PTHF-PGN copolymers has lowerglass transition temperature (-56 ˚C) than PGN (-35 ˚C). The main weight loss step in the polymer coincides with the exothermic dissociation of the nitrate ester groups in the side chain

کلیدواژه ها:

Poly Glycidyl nitrate ، Poly Tetrahydrofuran ، Copolymer ، Triblock