ABS is a copolymer formed by the polymerization of acrylonitrile and styrene in the presence of the additive polybutadiene. Acrylonitrile Butadiene Styrene (ABS) is a widely used thermoplastic polymer known for its versatility, durability, and ease of processing. ABS is an engineering plastic that is very easy to process and has a relatively low weight of 1.05 g/cm³. The moisture absorption of ABS is 0.4%, the modulus of elasticity is 2,400 N/mm², and the material allows a very high surface finish.