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초록

Turbostratic carbon materials with high electrical conductivity are important for electronic applications, yet conventional precursors require complex processing while yielding suboptimal performance. We introduce poly(m-phenyl benzophenone) (PBMP) copolymers with rigid-rod p-phenylene architecture as superior carbon precursors that combine excellent processability with enhanced carbonization performance. Three copolymers with varying monomer ratios, PBMP-0, PBMP-0.15, and PBMP-0.5, were synthesized. The PBMP copolymers display exceptional thermal stability (T-5% > 540 degrees C) and high carbonization yields (72-78%) at 1000 degrees C without requiring preprocessing steps, substantially outperforming conventional precursors like polyacrylonitrile (PAN, similar to 50%) and polyimide (PI, similar to 40%). Spectroscopic and structural analyses revealed that the carbonized PBMP films exhibit enhanced local structural ordering within a turbostratic carbon framework, together with a well-developed sp(2) carbon network. This structural optimization resulted in electrical conductivity of carbonized PBMP-0.5 of 468.1 +/- 65.4 S/cm compared to 95.0 +/- 6.5 S/cm for PAN. The exceptional performance is attributed to the precursor's high aromaticity, rigid-rod backbone, and reduced heteroatom content, which collectively minimize structural disorder during carbonization. These findings establish PBMP copolymers as promising precursors for next-generation carbon materials in applications requiring high electrical conductivity and dimensional stability.

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