While such tailor-made materials open the window to a realm of materials with unprecedented biological, physical, thermal and mechanical properties, this raises as well the need for efficient pathways to synthesize these compounds in significant amounts. The possibilities in macromolecular design are virtually endless – especially in combination with modular click chemistry 1 approaches – and almost any macromolecular architecture can nowadays be targeted in one way or another. Photoflow chemistry Controlled polymerization techniques, starting from anionic polymerization to the plethora of controlled radical polymerization techniques (referred to as reversible deactivation radical polymerization, RDRP) are without doubt the gold standard of contemporary polymer synthesis towards advanced materials. Further, the yet unexplored potential of these techniques is identified and discussed towards future development. The different photoRDRP methods are herein compared and the underlying principles of the advantage of carrying polymerization out under photoflow conditions are elucidated. Specifically the reversible deactivation radical polymerization (RDRP) techniques have gained significant interest in this respect within the past one to two years. By switching from batch to flow processing, polymerizations can be carried out with unmatched efficiency under mild reaction conditions, while concommitantly providing conditions for simple scale up of reactions. Precision polymer design in continuous photoflow reactors is a young, yet rapidly growing research field.
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