AbstractMethyl‐,n‐propyl‐, allyl‐, and phenyl isothiocyanates (MITC, PITC, AITC, and PHITC respectively) were polymerized in an RF (13.56 MHz) plasma electrodeless flow system. The plasma produced polymers were characterized using IR, GPC, GC/MS, and direct pyrolysis mass spectrometry (DPMS) techniques. The solubility tests and chromatographic examinations of the polymers revealed a small soluble fraction which contained a mixture of oligomers with a predominance of dimers and trimers. Molecular structure of the components of these fractions, identified by GC/MS, suggests fragmentation of the monomers to reactive fragments:documentclass{article}pagestyle{empty}begin{document}$$ ^ cdot {rm RSCN},^ cdot {rm RCN},{rm R}^ cdot ,^ cdot {rm CN} $$end{document}(in the case of MITC, PITC, AITC) anddocumentclass{article}pagestyle{empty}begin{document}$ ^ cdot {rm ArNCS},{rm PhS}^ cdot ,{rm Ph}^ cdot ,^ cdot {rm CN} $end{document}(in the case of PHITC). The DPMS data, being generally consistent with IR and GS/MS results, proved the presence in the polymers of sulfide, polysulfide, thiocarbonyl (–CS–S–and–S–CS–S–) groups, and molecular sulfur S8. Elementary plasma reactions involved in the formation of the observed structur
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