(a.) Somewhat like resin.

Bakelite Buna Celluloid Formica Lucite Mylar PVC Perspex Plexiglas Styrofoam Teflon acetate acetate nitrate alkyd aminoplast casein plastic cellophane cellulose acetate cellulose ether cellulose nitrate cellulosic coumarone-indene epoxy fluorocarbon plastic furane lignin melamine multiresin neoprene nitrate nylon phenolic urea polyester polymeric amide polypropylene polystyrene polyvinyl chloride resinoid silicone resin tetrafluoroethylene urea urea formaldehyde vinyl