ISOTACTIC POLYPROPYLENE CROSSLINKING IN THE PRESENCE OF PEROXIDE/SULPHUR COUPLE

摘要

The invention concerns crosslinking of isotactic polypropylene considered until now as a non-crosslinkable polymer. Polypropylene crosslinking not only generates novel uses but also the prospects of mixing and recovering operations both economical and ecological, with other polymers. Crosslinking or interpenetrating polymer networks (IPN) (as is the case with polypropylene/polyethylene mixture) provides both interesting properties and significant economic and ecological interest. The principle of the crosslinking mechanism is to create macro radicals and cause them to act immediately on sulphur before the reaction of the peroxide termination. The mixing process used is extrusion but other processes of transformation used for thermoplastics would be useful for subsequent industrial exploitation.