Journal
POLYMER
Volume 61, Issue -, Pages 198-203Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2015.02.010
Keywords
Atom transfer radical polymerization; Niobium complex; Recyclable photocatalyst
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Funding
- Natural Science Foundation of China [51173087, 21305133]
- Natural Science Foundation of Shandong [ZR2011EMM001]
- Taishan Scholars Program
- Jilin Province Science and Technology Development Plan Project [201201006]
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Niobium complex was successfully introduced into atom transfer radical polymerization (ATRP) system as a new kind of recyclable photocatalyst The niobium complex acted as photocatalyst that could be activated by the photoredox reaction under visible light irradiation and ethyl 2-bromoisobutyrate (EBiB) was used as initiator. Successful ATRP polymerizations of acrylates were realized. The well-defined polymers with controlled molecular weight and narrow polydispersity index (PDI) (M-w/M-n = 1.16 -1.30) could be achieved when the feed ratio of photocatalyst to EBiB was controlled properly. It was also found that the polymerization is highly responsive to light initiation, therefore, the polymerization can be controlled on or off at ease. In addition, the photocatalyst can be recycled and reused to initiate the polymerization for many times without significant compromisation of the initiation efficiency. (C) 2015 Elsevier Ltd. All rights reserved.
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