Preparation and lactonization of alternating copolymers of vinyl chloride and methyl methacrylate

Stereocontrol during the free‐radical polymerization of methacrylamides in the presence of Lewis acids

“…It is known that Lewis acids can influence the monomer reactivity20–22 and tacticity23, 24 during radical copolymerization. However, for homopolymerization, although Lewis acids were found to affect the monomer reactivity,25 the effect on the stereocontrol has been rarely reported 1, 5–8, 26–28.…”

Efficient Lewis Acid-Catalyzed Stereocontrolled Radical Polymerization of Acrylamides

“…More than thirty years ago, Lewis acids were found to significantly affect monomer reactivity during radical copolymerization, and afterward, its stereochemistry . However, until very recently, the influence of Lewis acids on the stereochemistry during radical homopolymerization had not been reported, probably because almost no effect on tacticity had been observed, although recently a remarkable advance has been made in the field of radical transformation .…”

Synthesis of Copolymers of Vinyl Chloride and Methyl Methacrylate. A Review

“…The synthesis of copolymers of VC with MMA by suspension [8], block [9], solution [10], and emulsion [11] methods of polymerisation has been described. The processes take place chiefly at a temperature of 40-65˚C [8,12], although there is an indication [13] that they can be carried out at lower temperatures (0-25˚C) in the presence of aluminium sesquichloride.…”

“…It has been established [13] that the structure of the polymer chain is influenced considerably by the composition of the monomer blend. In the copolymerisation of VC with MMA, catalysed with AlEt 1.5 Cl 1.5 or AlEtCl 2 , in the presence of benzoyl peroxide (BP) in a toluene solution or in bulk, with a large excess of the first monomer, a copolymer of alternating structure is formed, whereas with a shortage of the first monomer a copolymer rich in MMA is obtained.…”