Synthesis of macromers by means of living polymers and their polymerizabilities

Abstract

Monodisperse and pure macromers were synthesized by means of living polymers of cationic and anionic polymerizations. The macromers obtained were polytetrahydrofuran-, polystyrene-, polyisoprene-, andpoly(2-viny1pyridine)-macromers. The radical homopolymerizations of these macromers were performed, and the high reactivity of the macromers was revealed. copolymerizations of macromers with common small monomers were performed and rL and rz values were estimated. copolymerizations between two kinds of macromers were carried out to prepare a unique double-colored multibranch-polymer.

Unexpected radical polymerization behavior of oligo(2-ethyl-2-oxazoline) macromonomers

“…53 FRP of a poly(THF)acrylate macromonomer resulted in comb polymers with very short backbones whose DP was independent from the conversion. 54 RAFT polymerization using g irradiation as the radical source revealed pseudo-first order-kinetics for a M/CTA ratio of 30, but all synthesized comb polymers had backbone DP's below 20. 55 Consequently, the known chain transfer reactions taking place during radical polymerization of acrylates 56,57 might provide an explanation for the surprising molar mass evolution during the kinetic studies of the acrylate macromonomer (Scheme 2).…”

Synthesis of liquid crystalline graft and block copolymers by sequential cationic and free-radical polymerizations

“…The resulting thiolanium salt 9 was isolated and then modified with sodium methacrylate (10), which yielded methacrylate-terminated poly(tetrahydrofuran) 11 [16]. Finally, this macromonomer was copolymerized free radically in the presence of AIBN with the LC side-chain monomer 3, or 4, forming graft copolymer or poly-(l-g-4).…”

Synthesis of poly(N‐tert‐butylaziridine) macromonomers and graft copolymers with uniform side chains

“…In each copolymerization run the pre-weighted amount of macromonomer was mixed with corresponding amounts (see 'Itlbs. 2,3) of comonomer, solvent and initiator in a polymerization tube. The mixture was degassed by three freeze-thaw cycles.…”