▎ 摘　　要

The migration of excess plasticizer seriously affects the safety of propellants. In this paper, GO was functionalized with isocyanate groups (TGO) to improve its morphology, size, and reactivity. The composite liner with a multi-crosslinked structure was prepared, and its anti-migration properties were systematically studied. TGO fillers were added to the matrix to participate in crosslinking. A denser microstructure was constructed, which reduced the number and size of pores that small molecules could pass through, thus reducing their migration. The microstructure, anti-migration performance, and adhesion of the liner with 0.2 wt% TGO showed the greatest improvement. Compared with the hydroxy-terminated polybutadiene (HTPB) liner, the crystallinity percentage of the TGO/HTPB composite liner was 28.49% higher, and the crosslink density was 7.11% higher. The concentration of dioctyl sebacate (DOS) that migrated into the liner was decreased by 32.25%. In addition, the adhesion strength increased from 0.25 MPa to 1.56 MPa, which meets the requirements of current propellant systems. This study provides a feasible way to optimize the anti-migration and adhesion properties of composite liners. [GRAPHICS]