The reductive destruction of poly(methylene sulfides) and poly(methylene po
lysulfides) in the system hydrazine hydrate - NaOH at 70-115 degrees C invo
lves cleavage of the C-S bond and the formation of sulfide, disulfide and t
risulfide anions. Nitrogen and methane are main gaseous products of reducti
on. The reduction of C-S bonds in these polymers is proven by electrochemic
al methods.