Abstract
The synthesis of polymers with on-demand sequence structures is very important not only for academic researchers but also for industry. However, despite the existing polymerization techniques, it is still difficult to achieve copolymer chains with on-demand sequence structures. Here we report a dually switchable and controlled interconvertible polymerization system; in this system, two distinct orthogonal polymerizations can be selectively switched ON/OFF independent of each other and they can be interconverted promptly and quantitatively according to external stimuli. Thus, the external stimuli can manipulate the insertion of distinct monomers into the resulting copolymer chains temporally, spatially, and orthogonally, allowing the on-demand precise arrangement of sequence structures in the resulting polymers. This dually switchable and interconvertible polymerization system provides a powerful tool for synthesizing materials that are not accessible by other polymerization methods.
Highlights
The synthesis of polymers with on-demand sequence structures is very important for academic researchers and for industry
The use of stimuli to selectively start or suspend polymerization processes has attracted considerable attention, providing a very powerful tool for regulating polymerization[20,24,25,26,27,28,29,30,31,32,33,34]. Such switchable polymerization methods allow for the synthesis of polymers with controlled molecular weights and provide opportunities to operate polymerizations temporally, spatially, and orthogonally[35,36,37,38,39,40,41,42]
New monomers 2-methylthiirane (MT) and N-isopropyl acrylamide (NIPAM) were tested, and the results demonstrated that only MT was polymerized on heating, whereas only NIPAM was polymerized with blue light
Summary
The synthesis of polymers with on-demand sequence structures is very important for academic researchers and for industry. The external stimuli can manipulate the insertion of distinct monomers into the resulting copolymer chains temporally, spatially, and orthogonally, allowing the on-demand precise arrangement of sequence structures in the resulting polymers This dually switchable and interconvertible polymerization system provides a powerful tool for synthesizing materials that are not accessible by other polymerization methods. The use of stimuli to selectively start or suspend polymerization processes has attracted considerable attention, providing a very powerful tool for regulating polymerization[20,24,25,26,27,28,29,30,31,32,33,34] Such switchable polymerization methods allow for the synthesis of polymers with controlled molecular weights and provide opportunities to operate polymerizations temporally, spatially, and orthogonally[35,36,37,38,39,40,41,42]. The dually switchable polymerization system can polymerize cyclic monomers and vinyl monomers temporally, spatially, and orthogonally by heating or light irradiation, precisely manipulating the incorporations of monomers into the resulting polymer chains, forming copolymers with ondemand sequence structures
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