Well-defined rod coil diblock copolymers based on poly(3-hexylthiophene) and poly(methyl methacrylate) via metal-free atom transfer radical polymerization
Abstract
We have successfully demonstrated a facile synthetic route for well-defined three poly(3-hexylthiophene)-block-poly(methyl methacrylate) rod-coil diblock copolymers (P3HT-b-PMMA), P3HT50-b-PMMA16, P3HT50-b-PMMA21, and P3HT50-b-PMMA63 by metal-free atom transfer radical polymerization using pyrene as an organic photocatalyst. Polymerization of methyl methacrylate is efficiently activated with light leading to excellent control over the molecular weight, polydispersity, and compositions of the resulting diblock copolymers. The structure and properties of the resulting P3HT-b-PMMA diblock copolymers were characterized by proton nuclear magnetic resonance, gel permeation chromatography, fourier transform infrared.
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