Transparent poly(vinyl acetate)-silica gels by a sol-gel process

Anna B. Wojcik; Lisa C. Klein

doi:10.1117/12.165225

6 December 1993 Transparent poly(vinyl acetate)-silica gels by a sol-gel process

Anna B. Wojcik, Lisa C. Klein

Proceedings Volume 2018, Passive Materials for Optical Elements II; (1993) https://doi.org/10.1117/12.165225
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Rod shaped silica-poly(vinyl acetate) (PVAc) gels have been prepared by a sol gel process. In situ polymerization of tetraethoxysilane (TEOS) was accomplished in the presence of low molecular weight PVAc by dissolving various amounts of PVAc in a mixture of TEOS, ethanol, water and hydrochloric acid (HCl). Gelation of this mixture was carried out between room temperature and slightly above. Silica-PVAc rods recovered from cylindrical molds were homogeneous and transparent. Gels with weight percents of PVAc ranging from 2% to 50% were prepared. Silica-PVAc gels have higher flexure strengths, less brittle character and improved water durability in comparison with pure sol- gel silica.

Citation Download Citation

Anna B. Wojcik and Lisa C. Klein "Transparent poly(vinyl acetate)-silica gels by a sol-gel process", Proc. SPIE 2018, Passive Materials for Optical Elements II, (6 December 1993); https://doi.org/10.1117/12.165225

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