Polymerizable derivatives of long‐chain alcohols. II. Reactivity ratios for the copolymerization of some alkyl acrylates

Monomer reactivity ratios were determined for the copolymerization of some alkyl acrylate esters and, respectively, acrylonitrile and vinylidene chloride. For acrylonitrile (M 1 ), the values found were: for butyl acrylate, r 1 = 1.52 ± 0.03, r 2 = 0.75 ± 0.18; for octyl acrylate, r 1 = 1.93 ± 0.08, r 2 = 0.83 ± 0.23; for octadecyl acrylate, r 1 = 1.74 ± 0.04, r 2 = 0.68 ± 0.18. If it is assumed that there is no change in the magnitude of the kinetic constants with chain length, a value for the generalized alkyl acrylate and acrylonitrile may be calculated and r 1 = 1.61 ± 0.04, r 2 = 0.50 ± 0.19. Values found with vinylidene chloride (M 1 ) were: for butyl acrylate, r 1 = 0.88 ± 0.10, r 2 = 0.83 ± 0.02; for octyl acrylate, r 1 = 0.87 ± 0.02, r 2 = 0.70 ± 0.01; for octadecyl acrylate, r 1 = 0.91 ± 0.05, r 2 = 1.01 ± 0.01. For the generalized alkyl acrylate, the calculated values were r 1 = 0.88 ± 0.04, r 2 = 0.84 ± 0.01.