Jump to main content
Jump to site search

Issue 2, 2021
Previous Article Next Article

Transparent silphenylene elastomers from highly branched monomers

Author affiliations

Abstract

Thermally stable silicone elastomers based on silphenylenes are normally white solids at room temperature due to physical interactions between silphenylene moieties that lead to separated domains. We demonstrate that the Piers–Rubinsztajn reaction can be used to prepare highly branched tri- and tetrasilphenylene monomers from commercial alkoxysilanes and p-HSiMe2C6H4SiMe2H in the presence of B(C6F5)3. The H-terminated monomers could be cured to give soft elastomers simply by heating in air for up to 6 hours in the absence of a catalyst; curing occurs primarily via oxidative coupling of terminal SiH groups. The resulting elastomers were transparent (>95%) at room temperature up to 250 °C, and showed very good thermal stability (degradation begins >400 °C).

Graphical abstract: Transparent silphenylene elastomers from highly branched monomers

Back to tab navigation

Supplementary files

Article information


Submitted
12 Aug 2020
Accepted
18 Nov 2020
First published
19 Nov 2020

Polym. Chem., 2021,12, 209-215
Article type
Paper

Transparent silphenylene elastomers from highly branched monomers

S. Liang, M. Y. Wong, A. Schneider, M. Liao, G. Kräuter, M. N. Tchoul, Y. Chen and M. A. Brook, Polym. Chem., 2021, 12, 209
DOI: 10.1039/D0PY01148G

Social activity

Search articles by author

Spotlight

Advertisements