Abstract: According to the RTM phenolic resin system, rheological behavior, curing properties, ablation properties and others properties were studied, which provides the process parameter basis for preparation of composites. The influence of temperature and fiber volume on the properties of composites was studied by the process experiments, and the molding parameters were determined. The results show that the phenolic resin system has lower viscosity and a long low-viscosity keeping time at 70 ℃~80 ℃, which satisfied RTM requirement. The curing temperature step is 90 ℃, 120 ℃, 160 ℃, and the suitable volume content of the fiber is 50%~55%, which is the key technology of phenolic RTM process for the fabrication of ablation resistant composite with large and complex structures.

Key words: phenolic resin, composite, RTM, ablation