Polyamides, a material with repeating units linked by amide bonds, has 1316% DecaBDE and brominated polystyrene; while Polystyrene foam has 0.84% HBCD.
A polyamide is a polymer with repeating units linked by amide bonds. A polymer (/plmr/; Greek , "many" + , "part") is a substance or material consisting of very large molecules, or macromolecules, composed of many repeating subunits. 
