impact-modified polymer
Polymeric material whose impact resistance and toughness have been increased by the incorporation of phase microdomains of a rubbery material.
An example is the incorporation of soft polybutadiene domains into glassy polystyrene to produce high-impact polystyrene.
PAC, 2004, 76, 889. 'Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)' on page 899 (