Toward stable unimolecular micelles by means of “Living” free radical polymerization (LFRP) techniques

Horstmann, Sandra; Leimenstoll, Marc C.; Menzel, Henning

doi:10.1007/b100302

Cited by 2 publications

(2 citation statements)

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“…For example, 2-hydroxyethyl acrylate (HEA) − and 2-hydroxyethyl methacrylate (HEMA) − have been extensively employed to synthesize well-defined graft copolymers with 100% grafting density, that is, polymer brush, whereas protected hydroxyls of PHEMA backbone need to be deprotected and transformed into Br-containing ATRP initiation groups before initiating a second monomer to form side chains. The combination of NMP and ATRP have been reported to synthesize graft copolymers without polymeric functional group transformation; however, the grafting densities of those copolymers were all lower than 10% and the suitable monomers of side chains obtained by NMP are very limited. − Thus, preparing well-defined graft copolymers with controlled grafting densities without polymeric functional group transformation may be a significant advance in polymer chemistry.…”

Section: Introductionmentioning

confidence: 99%

“…The combination of NMP and ATRP have been reported to synthesize graft copolymers without polymeric functional group transformation; however, the grafting densities of those copolymers were all lower than 10% and the suitable monomers of side chains obtained by NMP are very limited. [29][30][31] Thus, preparing well-defined graft copolymers with controlled grafting densities without polymeric functional group transformation may be a significant advance in polymer chemistry. A feasible solution is to prepare a new functional monomer containing an initiation site, which can be copolymerized with another suitable monomer by living radical polymerization to give a well-defined backbone containing a certain amount of initiating groups.…”

Section: Introductionmentioning

confidence: 99%

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Convenient Synthesis of PtBA-g-PMA Well-Defined Graft Copolymer with Tunable Grafting Density

et al. 2009

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A series of well-defined graft copolymers, consisting of poly(tert-butyl acrylate) backbone and poly(methyl acrylate) side chains, were synthesized by the combination of reversible addition−fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP). A new acrylate monomer containing ATRP initiation group, tert-butyl 2-((2-bromopropanoyloxy)methyl)acrylate, was first prepared, which can be homopolymerized or copolymerized with tert-butyl acrylate by RAFT in a controlled way to obtain well-defined homopolymers and copolymers with narrow molecular weight distributions (M w/M n < 1.18). The reactivity ratios were determined by Fineman−Ross and Kelen−Tudos methods, respectively. The density of ATRP initiating groups can be tuned by the feed ratio of the comonomers. These polymers directly initiated ATRP of methyl acrylate to synthesize well-defined poly(tert-butyl acrylate)-g-poly(methyl acrylate) graft copolymers (M w /M n < 1.28) with controllable grafting densities via the grafting-from strategy without any polymeric functional group transformation. Finally, the poly(tert-butyl acrylate) backbone was selectively hydrolyzed in acidic environment without affecting the poly(methyl acrylate) side chains to give poly(acrylic acid)-g-poly(methyl acrylate) amphiphilic graft copolymers.

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