Photopolymerization of tetrafluoroethylene to a fusible polymer

Ultraviolet sources for photochemical application

“…The surface-photopolymerization process at low wavelengths from monomers such as C4H, (62,63), C4Cl, (63), and CzF4 (63) has recently been shown to yield polymeric thin-films of high temperature stability from monomers such as N-phenylmaleimide (64). The direct photolysis of C2F4 at pressures above 10 torr and at wavelengths less than 240019 yields a white particulate powder that fuses at temperatures -330°C to a clear deposit (65). The process then involves photopolymerization in the gas phase.…”