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The role of living/controlled radical polymerization in the formation of improved imprinted polymers

In this work, living/controlled radical polymerization (LRP) is compared with conventional free radical polymerization in the creation of highly and weakly cross‐linked imprinted poly(methacrylic acid‐co‐ethylene glycol dimethacrylate) networks. It elucidates, for the first time, the effect of LRP on the chain level and begins to explain why the efficiency of the imprinting process is improved using LRP. Imprinted polymers produced via LRP exhibited significantly higher template affinity and capacity compared with polymers prepared using conventional methods. The use of LRP in the creation of highly cross‐linked imprinted polymers resulted in a fourfold increase in binding capacity without a decrease in affinity; whereas weakly cross‐linked gels demonstrated a nearly threefold increase in binding capacity at equivalent affinity when LRP was used. In addition, by adjusting the double bond conversion, we can choose to increase either the capacity or the affinity in highly cross‐linked imprinted polymers, thus allowing the creation of imprinted polymers with tailorable binding parameters.