Portal de Periódicos da CAPES

Studies in cyclocopolymerization. III. Copolymerization of divinyl ether with certain nitrogen‐containing alkenes

1967; Inderscience Publishers; Volume: 5; Issue: 6 Linguagem: Inglês

10.1002/pol.1967.150050609

1542-9350

George B. Butler, Gerard Vanhaeren, Marie Francoise Ramadier,

Chemistry and Chemical Engineering

Abstract The copolymerization of divinyl ether with fumaronitrile (A), tetracyanoethylene (B), and 4‐vinylpyridine (C) has been studied, azobisisobutyronitrile being used as initiator. The compositions of the copolymers were calculated from their nitrogen and unsaturation content. Over a wide range of initial monomer composition, the mole fraction of A in the copolymers lies in the range 0.55–0.63, and the copolymers contained only 2–3% unsaturation, indicating a high degree of cyclization. The composition of the copolymers of B indicated that cyclization occurred to only a small extent, as the copolymers contained rather high unsaturation content. The values of r 1 = 0.23 and r 2 = 0.12 were obtained. The mole fraction of C in the copolymers lies between 0.85 and 0.998. If the assumption is made that r 1 ⋍ r c ⋍ 0 and there is predominant cyclization, r 2 = 32.0 in this case. The difference in the composition of the copolymers is attributed to the difference between the electron density of the double bonds in A, B, and C.