Abstract
Magnetic nanoparticles were used to support an ATRP catalyst for the polymerization of methyl methacrylate (MMA) for minimized adverse effect of catalyst support and easy catalyst separation. the nanoparticle-supported catalyst mediated a living/controlled radical polymerization of MMA as effectively as unsupported catalysts. with the addition of 22 mol % of CuBr 2, the polymer molecular weights were well-controlled with an initiator efficiency of 0.85 and polydispersity lower than 1.2. the supported catalysts could be easily separated/isolated using an external magnetic field and reused with slightly decreased activity but further improved control. the activity of the recycled catalyst was regenerated by copper metal or in-situ regeneration using reducing agents such as alkylamine or tin (II) compounds. Block copolymerization using PEG macroinitiator and chain extension were conducted to confirm the livingness. Block copolymers with controlled molecular weights and low polydispersity were obtained using the fresh or reused supported catalysts. It was concluded that nanosized supports had reduced adverse effects on catalysis. © 2006 American Chemical Society.
Recommended Citation
S. Ding et al., "Magnetic Nanoparticle Supported Catalyst for Atom Transfer Radical Polymerization," Macromolecules, vol. 39, no. 19, pp. 6399 - 6405, American Chemical Society, Sep 2006.
The definitive version is available at https://doi.org/10.1021/ma061062y
Department(s)
Chemical and Biochemical Engineering
International Standard Serial Number (ISSN)
0024-9297
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
19 Sep 2006
