Synthesis and Study of Copolymers of Methyl Methacrylate Wi̇th Oligopropylene Macromonomers

Abstract

The reaction of radical copolymerization of oligopropylene macromonomer (M1) with methyl methacrylate (M2) has been carried out, the regularities of the reaction and the properties of the obtained products have been studied. It has been found that the values of the relative activity of these monomers are r1=0.02 and r2=12.2, respectively. The fact that the value of the copolymerization constant of the oligopropylene macromonomer is close to zero indicates that it is not prone to homopolymerization reactions and only undergoes copolymerization reactions. The dependence of some properties of the synthesized copolymer on their composition has been studied and it has been shown that with an increase in the amount of the fragment formed from the oligopropylene macromonomer, the softening temperature and intrinsic viscosity values of the copolymers decrease, and, accordingly, a sharp decrease in the average molecular weight is observed. This is due to the passivity of the oligopropylene macromonomer in copolymerization reactions and the high probability of a chain transfer reaction through the oligopropylene macromonomer.