Plasma polymerization in mixture system of tetramethyltin and ammonia gas

Summary

Plasma polymerization in a mixture system of tetramethyltin (TMT) and ammonia (NH₃) gas was investigated by elemental analysis, IR spectroscopy, and ESCA in comparison with that in a mixture system of tetramethylsilane (TMS) and NH₃ gas. NH₃ gas contributed to the formation of polymers containing much tin, less carbon and hydrogen, and negligible nitrogen element. IR and ESCA spectra showed acceleration in dehydrogenation and /or dealkylation of carbon chains and in oxidation of tin element by NH₃ gas. While, plasma polymerization in the TMS/NH₃ mixture system showed incorporation of nitrogen residues as amido and amino groups as well as dehydrogenation and dealkylation. This descrepancy in chemical structure between polymerizations in the TMT/NH₃ and the TMS/NH₃ system might result from Sn-N bonds susceptible to moisture to form oxidized Sn.