Photoinduced Organocatalyzed Atom Transfer Radical Polymerization Using Low ppm Catalyst Loading
نویسندگان
چکیده
منابع مشابه
Metal-free atom transfer radical polymerization.
Overcoming the challenge of metal contamination in traditional ATRP systems, a metal-free ATRP process, mediated by light and catalyzed by an organic-based photoredox catalyst, is reported. Polymerization of vinyl monomers are efficiently activated and deactivated with light leading to excellent control over the molecular weight, polydispersity, and chain ends of the resulting polymers. Signifi...
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This Perspective presents recent advances in macromolecular engineering enabled by ATRP. They include the fundamental mechanistic and synthetic features of ATRP with emphasis on various catalytic/initiation systems that use parts-per-million concentrations of Cu catalysts and can be run in environmentally friendly media, e.g., water. The roles of the major components of ATRP--monomers, initiato...
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............................................................................................................................. iii Acknowledgments............................................................................................................... v Table of
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Desorption of thiol-based self-assembled monolayers on gold surfaces makes surface-initiated atom transfer radical polymerization (SI-ATRP) challenging and results in reduced density “grafted from” polymer fi lm. In this work, in situ attenuated total refl ectance-Fourier transform infrared (ATR-FTIR) spectroscopy shows that copper-based catalysts typically used in SI-ATRP cause substantial des...
متن کاملDiminishing catalyst concentration in atom transfer radical polymerization with reducing agents.
The concept of initiators for continuous activator regeneration (ICAR) in atom transfer radical polymerization (ATRP) is introduced, whereby a constant source of organic free radicals works to regenerate the Cu(I) activator, which is otherwise consumed in termination reactions when used at very low concentrations. With this technique, controlled synthesis of polystyrene and poly(methyl methacry...
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ژورنال
عنوان ژورنال: Macromolecules
سال: 2019
ISSN: 0024-9297,1520-5835
DOI: 10.1021/acs.macromol.8b02688