| Abstract: | The synthesis of poly(vinyl chloride-g-butyl rubber) and some of its physical properties are described. The key to the synthesis involves copolymerization initiation of an isobutylene–isoprene charge by a PVC/Et2AlCl initiator system with 1,2-dichloroethane as solvent. The graft is a thermoplastic; cast films are flexible and optically clear. Proof of grafting is the crosslinking with S2Cl2 of the pentane-extracted product in THF solution. Crosslinking the butyl rubber moiety in the graft reduces overall stress properties. |
