Acetylene plasma copolymers

Figure 7.15 Infrared spectra (4000-1250 cm ) of plasma copolymers of acetylene A, acetylene B, acetylene/H20 C, acetylene/CO D, acetylene/N2 E, acetylene/C0/H20 F, acetylene/N2/H20.

Figure 11.5 Changes in the internal stress of plasma copolymers of acetylene/N2 ( ) and of acetylene/H20/N2 (3) as a function of the mole ratio of nitrogen to acetylene.

Although numerous kinds of reactions could occur in the luminous gas phase, as far as the dissipation of vapor phase molecules (LCVD deposition) is concerned, one benzene molecule behaves as three acetylene molecules. Consequently, the final polymers formed (from acetylene and benzene) under the condition of relatively high WjFM are very similar. The transport characteristics of ultrathin films of plasma polymers and copolymers (with N2 and/or H2O) of acetylene and benzene are nearly identical. 

Acetylene was polymerized on hydrocarbon fibers treated with a cold plasma [136]. Composite films were investigated by electron scanning microscopy, which showed the formation of a graft copolymer on the surface of the hydrocarbon fibers. The stability of the material to air and temperature is much higher than that of a pure PA film. These composite electrodes exhibit the best characteristics. 

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