Kd. Belfield et Fb. Abdelrazzaq, NOVEL PHOTOINITIATED CATIONIC COPOLYMERIZATIONS OF 4-METHYLENE-2-PHENYL-1,3-DIOXOLANE, Journal of polymer science. Part A, Polymer chemistry, 35(11), 1997, pp. 2207-2219
Photoinitiated polymerization of 4-methylene-2-phenyl-1,3-dioxolane (1
) was carried out using either tris(4-methylphenyl) sulfonium hexafluo
roantimonate or 4-decyloxyphenyl phenyliodonium hexafluoroantimonate a
s initiators. H-1-NMR analyses confirmed exclusive ring-opening while
DSC and SEC were used to determine the glass transition temperatures (
T(g)s) and molecular weights, respectively. Photoinitiated cationic co
polymerizations of 1 were investigated with several acyclic and cyclic
monomers. Copolymerization of 1 with vinyl ethers and a spiroorthoest
er resulted in copolymers whose thermal properties were dependent on c
omonomer ratios. Copolymers of 1 and dihydrofuran or dihydropyran affo
rded soluble polymers with T(g)s significantly higher than the homopol
ymer of 1. (C) 1997 John Wiley & Sons, Inc.