Influence of acetic acid and ammonia catalyst on microstructure and properties of fluorinated polyimide-organosilicate hybrids
作者： Tzu Hsuan Chiang , Szu-Ling Liu , Shyh-Yang Lee , Tsung-Eong Hsieh
DOI: 10.1016/J.TSF.2009.05.013
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摘要: article This work investigates the preparation, microstructure and thermal/electrical properties of fluorinated polyimide-organosilicate hybrids utilizing acetic acid ammonia as catalysts for sol-gel process to grow organosilicate filler particles. Nano-scale was observed in base-catalyzed hybrids, which ascribed relative inertness base promoting hydrolysis reaction. postponed formation particles hence smaller particle size. Electrical measurements found that possess lower dielectric constants (κ=2.40 at nominal Si content=0.4 mol) due absence polar groups silica xerogels with high porosity samples. In both leakage current densities increase content. However, density hybrid higher than acid-catalyzed same content size highly porous feature embedded hybrids. © 2009 Elsevier B.V. All rights reserved.
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