Publications

Influence of DVB as linker molecule on the micropore formation in polymer-derived SiCN ceramics

Author(s)
C. Drechsel, H. Peterlik, C. Gierl-Mayer, M. Stöger-Pollach, T. Konegger
Abstract

In this work, the formation of transient microporosity during the polymer-to-ceramic conversion in polymer-derived ceramics was studied using a commercially available poly(vinyl)silazane precursor which was modified with divinylbenzene (DVB) as linker molecule during crosslinking. After pyrolysis treatments between 400 and 700 °C, the resulting materials not only showed distinct changes in elemental composition and structural features upon introduction of the linker molecule, but also a shift in micropore size, e.g. shifting from 0.84 nm to 0.70 nm after pyrolysis at 600 °C. Due to hindrance of transamination reactions in the low-temperature region, the nitrogen content in linker-containing samples was significantly higher, leading to a different composition of micropore-forming entities and, in case of the system studied, to smaller pores. These findings are a first step towards the clarification of the mechanisms leading to the pore formation in PDCs during pyrolytic conversion, which is essential for their use in prospective applications.

Organisation(s)
Dynamics of Condensed Systems
External organisation(s)
Technische Universität Wien
Journal
Journal of the European Ceramic Society
Volume
41
Pages
3292-3302
No. of pages
11
ISSN
0955-2219
DOI
https://doi.org/10.1016/j.jeurceramsoc.2021.01.051
Publication date
01-2021
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics, 205009 Ceramic materials
Keywords
ASJC Scopus subject areas
Ceramics and Composites, Materials Chemistry
Portal url
https://ucris.univie.ac.at/portal/en/publications/influence-of-dvb-as-linker-molecule-on-the-micropore-formation-in-polymerderived-sicn-ceramics(5917aaf9-5a21-4885-869d-66c4d2e01789).html