Polymerization of vinylcyclopropanes. IV. Radical copolymerization of 1,1-dichloro-2-vinylcyclopropane with maleic anhydride

Radical copolymerization between 1,1-dichloro-2-vinylcyclopropane (M₁) and maleic anhydride (M₂) was studied. Rearrangement of the radical caused from monomer M₁ and cyclization of growing chain, which was suggested from a consideration of composition and structure of the obtained copolymer, complicate the propagation step in this system. A peculiar copolymer composition equation containing four reactivity ratio parameters was developed, and these parameters were determined.