Synthesis and Characterization of GAP-PCL-GAP Copolymers as for energetic binder

The poly caprolactone(PCL) was synthesized used as macro- initiator in cationic ring opening polymerization of epichlorohydrin(ECH) in the presence of Stannous octanoate [Sn(Oct)2] as catalyst. In first step of PECH- PCL-PECH tribolck copolymer was synthesis and verified by IR, 1HNMR, 13CNMR and GPC, then in the second step conversion of CH2Cl groups to CH2N3 give the corresponding GAP-PCL-GAP energetic tribock copolymer. This new tribock copolymer was characterized by, IR, 1HNMR, and 13CNMR spectroscopy. Thermal behavior of corresponding polymer was characterized by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA results showed that GAP-PCL-GAP copolymers has lower glass transition temperature (-65 ˚C), high degradation temperature (205 ˚C) and narrow degradation temperature than glycidyl azide polymer (GAP).

کلیدواژه ها:

Energetic copolymer ، Copolymer GAP-PCL-GAP ، Triblock ، Binder