Abstract
The polymerization of o-(1,3-dioxolan-2-yl)phenyl ethyl fumarate (DOPEF) initiated with dimethyl 2,2 '-azobisiso-butyrate (MAIB) was studied kinetically in benzene. The polymerization rate (R p ) at 60°C was given by R p = k [MAIB] 0.76 [DOPEF] 0.71 . The overall activation energy of polymerization was calculated to be 98.3 kJ/mol. The number-average molecular weight of resulting poly(DOPEF) was in the range of 1000-3100. 'Hand 13 C-NMR spectra of resulting polymers revealed that the radical polymerization of DOPEF proceeds in a complicated manner involving vinyl addition, intramolecular hydrogen abstraction, and further ring opening of the cyclic acetal at higher temperatures. From the copolymerization of DOPEF (M 1 ) and styrene (St) (M 2 ) at 60°C, the monomer reactivity ratios were obtained to be r 1 = 0.02 and r 2 = 0.20, the values of which are similar to those of the copolymerization of ethyl o-formylphenyl fumarate and St.
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