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Systematic study towards high molar mass poly(phenylenemethylene): Synthesis, materials properties and processing

Applicant Caseri Walter
Number 159719
Funding scheme Project funding (Div. I-III)
Research institution Departement Materialwissenschaft ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Material Sciences
Start/End 01.06.2015 - 31.05.2018
Approved amount 211'007.00
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Keywords (7)

Catalysts; Films; Poly(phenylenemethylene); Materials properties; Inorganic compounds; Polymerization; metal oxide nanoparticles

Lay Summary (German)

Lead
Polymere auf Basis von Kohlenwasserstoffen gehören zu den fundamentalen chemischen Strukturen der Polymerchemie und dominieren den Massenmarkt. Erstaunlicherweise existiert in diesem Bereich immer noch eine Lücke in Form von Poly(phenylenmethylen), das bis jetzt noch nicht in nutzbarer Form, d.h ausreichend hoher molaren Masse, hergestellt werden konnte.
Lay summary

Inhalt und Ziel des Forschungsprojektes

Das Forschungsprojekt beinhaltet eine umfassende Untersuchung von Poly(phenylenmethylen) und verwandten Polymeren. Nach deren Synthese und Analyse der chemischen Struktur und insebsondere auch der molaren Masse  werden die Eigenschaften dieser Materialien untersucht. Dazu zählen die Hitzbeständigkeit, Erweichungstemperaturen, optische und elektrische Eigenschaften. Darüber hinaus werden die Polymere zu Filmen und Fasern verarbeitet.

Wissenschaftlicher und gesellschaftlicher  Kontext des Forschungsprogramms

Polymere sind ein essentieller Bestandteil des täglichen Lebens in vielerlei Hinsicht. Wir zielen auf einfach herzustellende Polymere, das neue Kombinationen von Materialeigenschaften enthalten.

 

 

Direct link to Lay Summary Last update: 02.04.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
Synthesis and fractionation of poly(phenylene methylene)
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.
Homoconjugation in Poly(Phenylene Methylene) s: A Case Study of Non-pi-Conjugated Polymers with Unexpected Fluorescent Properties
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, 707.
Polymers with Exceptional Photoluminescence by Homoconjugation
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.

Collaboration

Group / person Country
Types of collaboration
René Verel/ETH Zürich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
Stefano Trasatti/Universität Mailand Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Exchange of personnel
Nathan Cheetham/Imperial College London Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Paul Stavrinou Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Frank Uhlig/TU Graz Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
Jan Vermant/ETH Zürich Switzerland (Europe)
- Research Infrastructure
Nadia Mösch-Zanetti Austria (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
Paul Smith/ETH Zürich Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Research Infrastructure
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
European Materials Research Society (EMRS) Conference Talk given at a conference New Light from Old Material: Thermally Stable, Processable Poly(phenylene methylene) Exhibiting Fluorescence by Homoconjugation 18.06.2018 Strasbourg, France Brändle Andreas;
4th International Conference on Polymer Science and Technology Talk given at a conference Poly(phenylene methylene): A Thermally Stable, Processable Hydrocarbon Polymer with Unexpected Photoluminescence 04.06.2018 London, Great Britain and Northern Ireland Brändle Andreas;
Polymers: Design, Function and Appliation Poster Synthesis of Poly(phenylene methylene) with Unexpected Photoluminescence Caused by Homoconjugation 21.03.2018 Barcelona, Spain Brändle Andreas;
Materials Today, Tomorrow, and Beyond Poster Homoconjugation in poly(phenylene methylene) 18.10.2017 Zürich, Switzerland Caseri Walter; Brändle Andreas;
EUROMAT 2017 Talk given at a conference HOMOCONJUGATION IN POLY(PHENYLENE METHYLENE)S: UNEXPECTED FLUORESCENCE IN NON-π-CONJUGATED POLYMERS 17.09.2017 Thessaloniki, Greece Brändle Andreas;
SCS Fall Meeting 2017 Poster Homoconjugation in Poly(Phenylene Methylene) 21.08.2017 Bern, Switzerland Caseri Walter; Brändle Andreas;
12th International Conference on Optical Probes of Organic and Hybrid Semiconductors Talk given at a conference Poly(phenylene methylene): Non-pi-conjugated polymers with unexpected fluorescence properties 19.06.2017 Québec, Canada Brändle Andreas;


Abstract

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.
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