Originally developed in the 1960’s for military applications, S-2 offers a tensile strength that exceeds standard-modulus carbon fiber and most grades of aramid fiber, as well as strain-to-failure levels of 5.7%, compared to 2.8% for aramid, and 1.5% for carbon. The fibers are compatible with epoxies, polyesters, vinyl esters, rubber, and many thermoplastic resins.
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