Common binders are styrene maleic anhydride copolymer or styrene-acrylate copolymer. The individual chains of a graft copolymer may be homopolymers or copolymers. It is an acrylate rubber-modified styrene acrylonitrile copolymer. Cyclic olefin copolymer (COC) is an amorphous polymer made by several polymer manufacturers. Fluoropolymers can be homopolymers or Copolymer. The most common elastomer material used today is a styrene-butadiene copolymer. It is mainly used as blend with polystyrene, high impact styrene-butadiene copolymer or polyamide. SMA is a copolymer with maleic anhydride. Polybutylene adipate terephthalate (PBAT) is a biodegradable random copolymer. This polymer is a "diblock copolymer" because it contains two different chemical blocks. This way, a polymer blend is produced, not a copolymer. Monomers within a copolymer may be organized along the backbone in a variety of ways. In one way has been by adding a special polymer called a tetrablock copolymer. EGDMA can be used in free radical copolymer crosslinking reactions. Nafion can be produced as both a powder resin and a copolymer.