Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 42, Issue 15, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.202100211
Keywords
bromine– iodine transformation (BIT); narrow dispersity; NIR LED light; polymethacrylates; reversible‐ deactivation radical polymerization (RDRP)
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Funding
- National Natural Science Foundation of China [21774082, 21871201]
- Nature Science Key Basic Research of Jiangsu Province for Higher Education [16KJA150003]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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A facile strategy for synthesizing unimodal polymethacrylates with narrow dispersity (D < 1.10) has been successfully developed using a near-infrared (NIR) light-emitting diode (LED) controlled system, demonstrating the strong penetration ability of NIR LED light through 11 pieces of A4 paper.
A facile and clean strategy for synthesizing unimodal polymethacrylates with narrow dispersity (D < 1.10) is successfully developed by a near-infrared (NIR) light-emitting diode (LED) light (lambda(max) = 740 nm)-controlled in situ bromine-iodine transformation reversible-deactivation radical polymerization system without the use of NIR dyes and expensive catalysts. In this system, alkyl iodide ethyl alpha-iodophenylacetate (EIPA) initiator is generated in situ by the nucleophilic substitution reaction between an alkyl bromide compound ethyl alpha-bromophenylacetate and sodium iodide (NaI). At the same time, excessive NaI is also acted as a highly active catalyst by forming halogen bonds with terminal iodine of the polymer chains in this system to make it capable of precisely synthesizing polymethacrylates with narrow dispersities (D = 1.03-1.10). In addition, the strong penetration ability of NIR LED light is illustrated by the successful polymerization even through 11 pieces of A4 paper.
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