Copolymerizations of tetraethyl vinylidene phosphonate. Bisphosphonate units in the main polymer chain. II

This is the second part of the article with a subtitle “… The First Synthesis” published by us previously. For this, second part, we have chosen copolymers with low proportion of (-b-) units, as well as random copolymers with substantial proportions of (-b-) units. This is in contrast to the part I, in which we mostly described alternating copolymerization. In this article, radical copolymerization of tetraethyl vinylidene phosphonate (B) with several vinyl/ethylenic monomers (M2), namely acrylamide, methacrylamide, methyl methacrylate, n-butyl acrylate, n-butyl methacrylate, and styrene has been described and reactivity ratios of monomers as well as the average length of the comonomer blocks (n) have been determined (r1 = 0). It has been found, that (as it should be) there is a proportionality between r2 (=km2M2/km2B) and n. Moreover, there is a proportionality between r2 (or n) and the comonomer (M2) “reactivity,” defined as the rate constant of M2 addition to the styrene radical. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 1614–1621