Process for forming tetrazole polymers comprising adding substances of the formula N HCOC H X where X is a member selected from the group consist ing of Br, Cl, and l to a medium where base is present therein in a molar equivalent amount to said N-S-tetrazolyl haloacetamide or slightly less than a molar equivalent amount and then heating said medium at -l00C for a minimum of 5 days. 4.