Abstract
NAFION®/silicon oxide hybrids were prepared from solution by hydrolysis/polycondensation of alkoxy silanes. Transparent, but brittle films were obtained when TEOS was used as the inorganic polymer precursor, showing a lamellar structure by transmission electron microscopy. Part of the TEOS was substituted by TMDES to increase the film flexibility. For substitution higher than 10% phase separation was clearly observed by scanning and transmission electron microscopy. The thermal analysis of NATION® and hybrids with different inorganic contents showed two main endothermic transitions, one assigned to the NAFION® ionic clusters and the other to the melting of the perfluorinated matrix. The cluster transition temperature decreases as the TEOS content increases up to 50 wt%, but than increases as the TEOS content reaches 80 wt%.
Original language | English (US) |
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Pages (from-to) | 1309-1315 |
Number of pages | 7 |
Journal | Polymer |
Volume | 39 |
Issue number | 6-7 |
DOIs | |
State | Published - Mar 1998 |
Externally published | Yes |
Keywords
- NAFION®
- Polymer hybrids
- Sol-gel
ASJC Scopus subject areas
- Materials Chemistry
- Polymers and Plastics
- Organic Chemistry