Catalysts; Films; Poly(phenylenemethylene); Materials properties; Inorganic compounds; Polymerization; metal oxide nanoparticles
Andreas Braendle, Pascal Schwendimann, Markus Niederberger, Walter R. Caseri (2018), Synthesis and fractionation of poly(phenylene methylene), in Journal of Polymer Science A, Polymer Chemistry
, 56, 309-318.
Andreas Braendle, Aleksandr Perevedentsev, Nathan J. Cheetham, Paul N. Stavrinou, Jörg A. Schachner, Nadia C. Mösch-Zanetti, Markus Niederberger, Walter Caseri (2017), Homoconjugation in Poly(Phenylene Methylene) s: A Case Study of Non-pi-Conjugated Polymers with Unexpected Fluorescent Properties, in JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Andreas Braendle, Aleksandr Perevedentsev, Nathan J. Cheetham, Paul N. Stavrinou, Jörg A. Schachner, Nadia C. Mösch-Zanetti, Markus Niederberger, Walter Caseri (2017), Polymers with Exceptional Photoluminescence by Homoconjugation, in Chimia
, 71(10), 733.
Hydrocarbon polymers of the formula [(CxHy)n] belong to the basic structures in polymer architecture, and some of them even dominate global polymer demands. Surprisingly, however, poly(phenylenemethylene), C7H6, with molar mass sufficiently high to attract interest in materials science is not available so far, in spite of a number of attempts to synthesize such materials. This polymer has been expected, e.g., to be of high thermal stability and of very high melting temperature, and has been proposed to be of use for various applications. In the proposed study, we aim at a comprehensive investigation of high molar mass poly(phenylenemethylene), ranging from systematic synthetic approaches and mechanistic investigations to determination of materials properties and polymer processing. Based on initial investigations we will explore synthesis of the materials by polymerization of benzyl chloride, benzyl alcohol and dibenzylether, respectively, using a variety of catalysts based on tin, titanium and tungsten, including nanoparticles of their oxides. Besides thermal, mechanical and optical properties, electric conductivity will also be considered since, notably, semiconductive behavior has been found for a low molar poly(phenylenemethylene), maybe arising from accidental doping. Finally, polymer processing involves fabrication of (oriented) films and fibers, also with the help of colleagues within and outside ETH.