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

Abstract

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 (M 2 ), 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 (r 1 5 0). It has been found, that (as it should be) there is a proportionality between r 2 (5k m2M2 /k m2B ) and n. Moreover, there is a proportionality between r 2 (or n) and the comonomer (M 2 ) "reactivity," defined as the rate constant of M 2 addition to the styrene radical.

Synthesis, thermal analysis, and linear and nonlinear optical characterization of substituted polyphosphonates derived from 1,12-dodecanediol

“…Polyphosphonates (Chart ) are a highly modular class of hybrid inorganic/organic polymers. The properties of these polymers are highly tunable via the appropriate choice of the X, R, and R′ groups, therefore making them accessible for a variety of applications . In addition, this class of polymers possesses thermal stabilities similar to those of organic systems such as poly(methyl methacrylate), polystyrene, polyethylene, or polypropylene…”