SEARCH Articles Figures Tables Grafting reactions between PET end groups and glycidyl-methacrylate-containing rubber tougheners. This reaction is critical in ensuring that the reactive elastomeric toughener becomes grafted to the PET matrix and forms smaller, uniform domains of a rubber dispersed phase [Publishers Imprint] See Also: Grafting reactions between PET end groups and glycidyl-methacrylate-containing rubber tougheners. This reaction is critical in ensuring that the reactive elastomeric toughener becomes grafted to the PET matrix and forms smaller, uniform domains of a rubber dispersed phase