论文部分内容阅读
Glycidyl azide polymer(GAP) is one of the most recognized and prominent azide polymer.Because of its superior properties,GAP is used extensively as a high energetic binder or plasticizer in propellants to increase burning and specific impulse.It is very important to research on the glass-transition temperature(Tg) of GAP and its precursor PECH(poly-epichlorohydrin) due to the Tg of binders is the key factor which can influence low temperature properties of solid propellants.PECH with different molecular weight and different functionality were synthesized by ring-opening polymerization of epichlorohydrin using different initiators and SnCl4/CF3COOH as catalyst,and GAP were prepared by treating the corresponding PECH with sodium azide in DMF solvent at 100 ℃ for 9-11 h in this paper.Then the Tg of PECH and GAP were determined by DSC respectively.
Glycidyl azide polymer (GAP) is one of the most recognized and prominent azide polymers. Because of its superior properties, GAP is used extensively as a high energetic binder or plasticizer in propellants to increase burning and specific impulse. It is very important to research on the glass-transition temperature (Tg) of GAP and its precursor PECH (poly-epichlorohydrin) due to the Tg of binders is the key factor which can influence low temperature properties of solid propellants. PEGH with different molecular weight and different functionality were synthesized by ring-opening polymerization of epichlorohydrin using different initiators and SnCl4 / CF3COOH as catalyst, and GAP were prepared by treating the corresponding PECH with sodium azide in DMF solvent at 100 ° C for 9-11 h in this paper. The Tg of PECH and GAP were determined by DSC respectively.