Preparation of Propylene-Methyl Acrylate-Sulfur Dioxide Terpolymer

Preparation of Propylene—Methyl Acrylate-Sulfur Dioxide Terpolymer [58] 

To a 300-ml Crown-capped polymerization bottle at -80 C, are charged 12 gm (0.125 mole) of bicyclo[2.2.1]hept-2-ene, 15.0 gm (0.230 mole) sulfur dioxide, 3.0 gm (0.03 mole) of ethyl acrylate, and 30 gm of methanol. The bottle is sealed and rotated end-over-end in a glycol water bath maintained at 0°C. The 

Other bicyelo[2.2.1]hept-2-ene and derivative sulfur dioxide polymers were prepared by a similar method and are shown in Table XVII. 

Vinyl aeetate copolymerizes with SO2 at — 70°C using t-butylhydroperoxide as the initiator to give a 1 1 copolymer of molecular weight 100,000 [61a]. More recently it has been shown that the temperature has a great effect on the amount of copolymerization taking place [61b]. Some of the data are shown in Table XVIIa. At 110°C VAc and SO2 form two separate layers and copolymerization does not take place. 

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