Free radical polymerization of unconjugated dienes, 15. Dependence of the composition of poly(methacrylic anhydride) on the monomer concentration

Abstract

The free radical polymerization of methacrylic anhydride in chloroform solutions was investigated at different temperatures. By employing statistical analysis of the experimental data, it could be shown that in all the cases the dependence of the mole fraction of cyclic structural units on the monomer concentration, at which the polymer has been obtained, is in agreement with a kinetic relationship generally valid for the free radical cyclopolymerization of symmetrical unconjugated dienes. *I Part 14: cf. Makromol. Chem. 175, 457 (1974).

Dynamic covalent exchange induced cyclization in poly(methacrylic anhydride)

“…[3][4][5][6][7] For example, it has been shown that the cyclopolymerization of acrylic anhydride (AA) produces both five membered and six membered rings, while MAA exclusively produces six membered rings during polymerizations conducted up to 80 °C. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] An additional and notable feature of the anhydride-containing MAA and AA diene monomers is that the anhydride moieties are able to undergo dynamic covalent exchange (DCE), which leads to the rearrangement of the polymer structure.…”

“…3–7 For example, it has been shown that the cyclopolymerization of acrylic anhydride ( AA ) produces both five membered and six membered rings, while MAA exclusively produces six membered rings during polymerizations conducted up to 80 °C. 8–22…”