Synthesis and investigation of the solution behavior of graft block copolymers of polyimide and poly(methyl methacrylate)

Multicenter Polyester Initiators for the Preparation of Graft Copolymers with Oligo(2‐Oxazoline) Side Chains

“…These results correspond with the data presented in Ref. (where initiator efficiency was found to be 40–50%); these data were obtained in the experiments involving grafting of side PMMA chains with the use of polymethacrylate macroinitiator and in the case of grafting PMMA to polyimide macroinitiator . The observed decrease in initiation efficiency in case of multicenter macroinitiators can be possibly explained by the fact that growth rate of side chains significantly exceeds initiation rate; as a result, a portion of initiating groups does not participate in the process (due to steric hindrances created by adjacent side fragments).…”

Methods of controlled radical polymerization for the synthesis of polymer brushes

“…Macromolecules of polyimide brushes are charac terized by a high equilibrium rigidity (Kuhn segment length of >40 nm) [141] that is several tens of times higher than the corresponding characteristics of poly imide macroinitiators used for the synthesis of these brushes [140]. In selective solvents of various thermo dynamic qualities for the backbone and side chains, such polyimide brushes assume conformations of a more or less elongated ellipsoid of revolution [142,143] or form a nearly spherical core-shell structure with the collapsed backbone (core) surrounded by side chains protruding into the solution [143], as con firmed by the computer simulation method [144].…”

Achievements in polycondensation and condensation polymers

“…PI was used as a macroinitiator in the controlled radical polymerization of vinyl monomers to give rise to new polymer brushes [271][272][273][274][275].…”