Study on the properties of the liner of HTPE propellant

Abstract

A kind of liner suitable for HTPE propellant was developed by constructing HTPE and HTPB blend adhesive system. The effects of different solid fillers and crosslinker on the mechanical properties, adhesive properties, and ablation resestance and migration resistance of the liner were investigated. The surface mophology of the liner was observed by SEM. The results show that when the blending ratio of HTPE and HTPB is 1:5, 7 % molecular sieves, 7 % silica and chain extender TMP were added respectively, the tensile strength of the liner reaches 2.30 MPa at 20 ℃, and the fracture elongation is 203 %, the linear ablation rate is 0.59 mm･s^-1, the pull-off strength of the shell⁄insulator⁄liner⁄propellant reaches 0.90 MPa, and the mobility of nitrate ester plasticizer is 4.3 %.