Synthesis and photochemical properties of high-impact styrene copolymers containing keto groups

Abstract A method for the preparation by suspension polymerization of high-impact styrene copolymers containing built-in keto groups is described. Some of the features of the process are described. Photolysis of these copolymers on irradiation with polychromatic and monochromatic light ( λ = 313 and 366 nm) has been investigated. The quantum yields of cleavage of the main chain (o cs ) in film or solution have been shown to be concentration dependent. It has been concluded that the photoprocesses in these two-phase polymeric systems proceed independently in the polymer matrix and in the dimethylformamide insoluble fraction.