▎ 摘　　要

Segregated conductive composites based on all-aromatic liquid crystal polymers (LCPs) are ideal material can-didates for electromagnetic interference (EMI) shielding. However, grand challenges still remain for constructing segregated LCP composites due to the sharp viscosity decrease at crystal-to-nematic transition temperature and the very low melt-viscosity of LCPs. Herein, conductive composites based on all-aromatic multiblock poly (esterimide)s (BPEI) and multilayer graphene (MLG) with well-defined segregated structure were fabricated by solid-state compression molding with a broad processing window, which was enabled by the appropriate vis-cosity at the rubbery state originating from the two very distinct glass transition temperatures of the as -synthesized BPEI block copolymer. The segregated BPEI/MLG composite with 5.0 wt% MLG loading achieves an ultrahigh electrical conductivity of 313.5 S/m and a high EMI shielding effectiveness of 62.2 dB at a thickness of only 2.3 mm. Moreover, the segregated BPEI/MLG composites exhibit high thermal stability and outstanding flame retardancy.