RADICAL POLYADDITION-ISOMERIZATION OF BIFUNCTIONAL VINYLCYCLOPROPANESWITH DITHIOLS

Synthesis and radical polyaddition-isomerization of novel bifunctional vinylcyclopropane derivatives, 1,4-xylylene bis(2-isopropenyl-2-methy lcyclopropanecarboxylate) (1a), ethylene s(2-isopropenyl-2-methylcyclo propanecarboxylamide) (1b), and bis(2-isopropenyl-2-methylcyclopropane methyl) terephthalate (Ic) with dithiols were carried out. Polymers wi th molecular weights and polydispersities of 1100-11000 and 1.18-7.35, respectively, were obtained. The radical polyadditions of 1a with dit hiols afford polymers containing a homopolymer of 1a, while those of 1 b and 1c with dithiols afford polymers with a content of dithiol units of exactly 50 mol-%.