THERMAL-DISSOCIATION OF MOLECULES UNDER THE ACTION OF RESONANT LASER-RADIATION ON POLYMER SURFACES

The physical mechanisms of resonant laser interaction with the surface of polymers: cellulose, its derivatives, polystyrene, bisphenol A-epo xy resin, and aromatic molecular crystals, in vacuum at an energy flux density of similar to 10(6)-10(8) W/cm(2) were studied. Comparison of IR and W radiation showed that the action of a UV laser on the above polymers is of the thermal type. It was shown that the resonant laser irradiation under collisionless flying-off conditions leads to the dis sociation of macromolecules on the surface via several independent pat hways, each of the channels having its own activation energy. The set of products formed from chemically active polymers is also determined by secondary reactions on the surface.