| 摘要 |
PURPOSE: Composite material is provided to have excellent mechanical and electrical properties, and to have low gas transmittance and high glass transition temperature. CONSTITUTION: Composite material comprises an epoxy resin, a hardener, a hardening accelerator, and graphite. The epoxy resin is a polyfunctional epoxy resin, and the hardener is polyfunctional phenol resin. The polyfunctional epoxy resin is mixture of one or two more selected from compounds in chemical formula 1, 2 and 3. In chemical formula 1, R1, R2 and R3 are CH2CHO, and n is 1-4. In chemical formula 2, R4, R5 and R6 are CH2CHO. In chemical formula 3, R7, R8, R9 and R10 are CH2CHO.
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