With tetrahydrofuran or cyclohexanone as dissolvent

Friedel-Crafts reaction grafting of polyvinyl chloride and polystyrene was realized through microwave irradiation.Graft of PVC-g-PS was successfully prepared.Influence of heating method

reaction temperature

type and mass fraction of catalyst on grafting reaction and grafting ratio was investigated.Graft structure of PVC-g-PS was characterized through FTIR

the mechanism and features were discussed.Results showed that Friedel-Crafts reaction grafting of polyvinyl chloride and polystyrene can carry out through heating by oil bath or microwave irradiation.Under heating with oil bath the graft of PVC-g-PS occurs at the meta position of the benzene ring

and the graft ratio is only 0.27%; while in the case of microwave irradiation

the graft of PVC-g-PS occurs at ortho-para positions of the benzene ring

and the graft ratio reaches up to 23%.Anhydrous AlCl3

FeCl3 or SnCl4 can all catalyze Friedel-Crafts reaction grafting of polyvinyl chloride and polystyrene

but the best catalytic activity is observed for anhydrous AlCl3.When the mass fraction of anhydrous AlCl3 is 3%

the highest graft ratio reaches up to 29%

but when mass fraction of anhydrous AlCl3 is over 3%

the graft ratio declines

PVC begins degradation and produces olefinic bonds.Research results demonstrate that microwave irradiation is an effective way of realizing Friedel-Crafts reaction grafting of polyvinyl chloride and polystyrene.