Densely-grafted and double-grafted PEO brushes via ATRP. A route to soft elastomers
Neugebauer, D; Zhang, Y; Pakula, T; Sheiko, SS; Matyjaszewski, K
Source PublicationMACROMOLECULES
AbstractTwo macromonomers containing ethylene oxide (EO) segments with different degrees of polymerization (DPPEO = 5 and 23), capped by a methoxy and a methacrylate group (PEOMA), were polymerized by atom transfer radical polymerization (ATRP) in organic solvents. In addition to the direct preparation of densely grafted brush copolymers by "grafting through" the macromonomers, the lower molecular weight PEOMA (MWav = 300 g/mol, DPPEO = 5) was also employed in a "grafting from" reaction using a well-defined multifunctional macroinitiator poly(2-(2-bromopropionyloxy)ethyl methacrylate) (PBPEM, M-n,M-app = 82 x 10(3) g/Mol, M-w/M-n = 1.16, degree of polymerization of backbone DPb = 428). This procedure allowed the preparation of densely double-grafted brush copolymers with various degrees of polymerization of the side chains (DPsc = 12-43). Attempts to prepare double-grafted brushes with DPsc > 50 or to use a macromonomer with a longer PEO chain (MWav = 1100 g/mol, DPPEO = 23) in the "grafting from" reaction resulted in formation of a cross-linked gel. Both the cross-linked mono- and double-grafted brush copolymers are examples of a new class of elastomeric materials with soft rubbery properties (G' similar to 10(4) Pa).
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WOS IDWOS:000185224800011
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Cited Times:258[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorMatyjaszewski, K
Affiliation1.Carnegie Mellon Univ, Dept Chem, Ctr Macromol Engn, Pittsburgh, PA 15213 USA
2.Max Planck Inst Polymer Res, D-55021 Mainz, Germany
3.Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA
4.Polish Acad Sci, Ctr Polymer Chem, PL-41819 Zabrze, Poland
5.Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun, Peoples R China
Recommended Citation
GB/T 7714
Neugebauer, D,Zhang, Y,Pakula, T,et al. Densely-grafted and double-grafted PEO brushes via ATRP. A route to soft elastomers[J]. MACROMOLECULES,2003,36(18):6746-6755.
APA Neugebauer, D,Zhang, Y,Pakula, T,Sheiko, SS,&Matyjaszewski, K.(2003).Densely-grafted and double-grafted PEO brushes via ATRP. A route to soft elastomers.MACROMOLECULES,36(18),6746-6755.
MLA Neugebauer, D,et al."Densely-grafted and double-grafted PEO brushes via ATRP. A route to soft elastomers".MACROMOLECULES 36.18(2003):6746-6755.
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