. Fourier
transform infrared spectroscopy (FTIR) was used to confirm the
formation of the block and/or graft copolymers during reactive
extrusion and further to study the effect of scCO2 on the yield
of the in situ formed copolymers. Scanning electron microscopy
(SEM) was applied to study the phase dispersion of PP/PS blends
prepared via different approaches and thus to reveal the functions
of scCO2 in improving phase dispersion in the in situ compatibilization.
Impact tests were performed with samples prepared via
different approaches without and with annealing to confirm the
effectiveness of in situ compatibilization with scCO2