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Demonstrates effective synthesis of high molecular weight polymers, indicating broader applicability in polymer chemistry.
Achieving precise control over the synthesis of high molecular weight poly(carboxylic acids) remains a formidable challenge. Herein, we report the use of triplet-enhanced photoiniferter polymerization (TEPP) to address this limitation. Aqueous TEPP of acrylic acid exhibits rapid kinetics, strict temporal control, high end-group fidelity, and excellent oxygen tolerance under mild blue light irradiation at room temperature, yielding poly(acrylic acid) with molecular weights up to 1370 kg mol –1 ( Đ = 1.10). Rheological studies reveal a pronounced influence of molecular weight on the chain dynamics and viscoelastic properties of the polymer solutions. Furthermore, this TEPP strategy is extended to the precipitation polymerization of 2-carboxyethyl acrylate, demonstrating its synthetic versatility and broad applicability.
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Chen et al. (2026) studied this question.
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