Graft copolymerization in supercritical media

摘要: A supercritical graft copolymerization process is described which includes the steps of: adding a polymer into high pressure reactor; free radically polymerizable monomer radical polymerization initiator; sufficient amount of solvent to dissolve at least portion and when conditions are achieved inside heating pressurizing reactor achieve therein for time effect on by polymerizing forms one side chain polymer. In general, reaction will range from 70 atm. 200 temperature 50° C. 90° examples provided above, was carbon dioxide. However, there no need limit application such in that be equally applicable other solvents have ability grafting reactor. six hours, although shorter longer times contemplated within scope this invention, merely being listed as best mode known inventors filing application. Specifically, has been demonstrated polyolefin, particularly polypropylene poly(vinyl chloride), backbone polymers certainly invention. Specific discussed wherein used selected group consisting styrene acrylic acid polyolefin also specifically chloride) grafted based vinyl acetate.