Synthesis of Molecular Brushes with Gradient in Grafting Density by Atom Transfer Polymerization
- 21 March 2002
- journal article
- research article
- Published by American Chemical Society (ACS) in Macromolecules
- Vol. 35 (9), 3387-3394
- https://doi.org/10.1021/ma012100a
Abstract
Macromolecular brushes with a gradient of side-chain spacing along the backbone have been synthesized by the “grafting from” approach using atom transfer radical polymerization. A macroinitiator was prepared in two steps, first by conducting a gradient copolymerization of MMA and HEMA-TMS followed by transformation of the resulting poly(MMA-grad-HEMA-TMS) to poly(MMA-grad-BPEM). The gradient composition of the macroinitiator was a forced gradient formed by continuous feeding of HEMA-TMS during MMA polymerization. The gradient structure was characterized by monitoring monomer conversion (GC) and molecular weight evolution (GPC) during copolymerization. AFM measurements demonstrated the characteristic anisotropy of the molecular structure by resolving individual brush molecules with a bulky head and a thin tail.Keywords
This publication has 31 references indexed in Scilit:
- Atom Transfer Radical PolymerizationChemical Reviews, 2001
- New Polymer Chain Architecture: Synthesis and Characterization of Star Polymers with Comb Polystyrene BranchesMacromolecules, 2000
- Amphipolar core-shell cylindrical brushesMacromolecular Rapid Communications, 1999
- Copper(I)-Catalyzed Atom Transfer Radical PolymerizationAccounts of Chemical Research, 1999
- Identifying the Nature of the Active Species in the Polymerization of Methacrylates: Inhibition of Methyl Methacrylate Homopolymerizations and Reactivity Ratios for Copolymerization of Methyl Methacrylate/n-Butyl Methacrylate in Classical Anionic, Alkyllithium/Trialkylaluminum-Initiated, Group Transfer Polymerization, Atom Transfer Radical Polymerization, Catalytic Chain Transfer, and Classical Free Radical PolymerizationMacromolecules, 1997
- Controlled/“Living” Radical Polymerization. Kinetics of the Homogeneous Atom Transfer Radical Polymerization of StyreneJournal of the American Chemical Society, 1997
- Copolymers with controlled distribution of comonomers along the chain, 1. Structure, thermodynamics and dynamic properties of gradient copolymers. Computer simulationMacromolecular Theory and Simulations, 1996
- Introduction to living polymeriz. Living and/or controlled polymerizationJournal of Physical Organic Chemistry, 1995
- Macromonomers: A new class of polymeric intermediates in macromolecular synthesis - II - homo- and copolymerizationDie Makromolekulare Chemie, 1985
- Microstructure of the copolymers of methyl methacrylate with other methacrylates obtained by radical and anionic copolymerizations in tetrahydrofuranJournal of Polymer Science: Polymer Chemistry Edition, 1979