In the development of a new polymer blend aimed at enhancing impact resistance, which combination of processing conditions and polymer types would most likely lead to optimal phase separation and improved mechanical properties?

High shear forces stir the mix quickly, which forces a rubbery copolymer to break into tiny droplets. Other options are incorrect because Low cooling rates keep the two amorphous polymers mixed together for a long time; Moderate temperatures give the polymers some movement, but they are not forced to separate.