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Faculty for Biology, Chemistry, and Earth Sciences

Macromolecular Chemistry I:

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Erhardt, A.; Hochgesang, A.; Meichsner, F.; Thelakkat, M.: High electron mobility and tuneable glass transition temperature in fullerene-functionalized polynorbornenes, Journal of Materials Chemistry C, 10(16), 6419-6428 (2022) -- DOI: 10.1039/d2tc00496h
Ring-opening metathesis polymerization is employed to copolymerize a C-60-functionalized norbornene monomer and its alkyl substituted analog, yielding a range of fullerene-grafted polynorbornene copolymers with varying fullerene-contents. High control over the comonomer built-in ratio is demonstrated and subsequently used to correlate thermal and electronical properties to the fullerene content of the copolymers. While previous works on fullerene-grafted polymers reported high glass transition temperatures and low electron mobilities, we show relatively low and controllable glass transition temperatures between T-g = 16.8 degrees C and T-g = 145.9 degrees C. Full suppression of fullerene crystallization is confirmed, while achieving outstanding bulk electron mobilities up to mu(e) = 0.33 cm(2) V-1 s(-1).
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