Study on Establishing Compatibility Evaluation between Low-Toxicity Hypergolic Fuel and O-ring

Rubber O-rings are widely used in liquid fuel propulsion systems for sealing and wear resistance, making their compatibility with fuels critical for reliable operation.This study evaluated the chemical and mechanical compatibility between SPLP fuels and O-rings.From the fuel perspective, both SPLP01 and SPLP02 maintained stability when in contact with FFKM and EPDM.However, from the o-ring perspective, EPDM exhibited poor compatibility with SPLP02 in the compression set test, indicating reduced material resilience. , . . , SPLP01, SPLP02 FFKM, EPDM . , SPLP02 EPDM .