Abstract
The polyamic acid (PAA) solutions were blended directly with a commercial nanoscale colloidal silica sol, and converted to polyimides (PIs)/silica nanocomposite films. Polyamic acid was prepared from the reaction of Pyromellitic anhydride (PMDA), 4,4-oxydianiline (ODA). The nanoscale silica particles were dispersed well in PI from scanning electron microscopy (SEM) and the nanocomposite films showed a moderated optical transparency for up to 30 wt % of silica content. These PI/silica nanocomposite films exhibited better mechanical properties, higher glass transition temperature (Tg), better thermal stability and lower coefficient of thermal expansion (CTE) with increasing silica content from tensile tests, dynamic mechanic analysis (DMA) and thermogravimetric analysis (TGA).
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Huang, JW., Wen, YL., Kang, CC. et al. Preparation of Polyimide-Silica Nanocomposites from Nanoscale Colloidal Silica. Polym J 39, 654–658 (2007). https://doi.org/10.1295/polymj.PJ2006217
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DOI: https://doi.org/10.1295/polymj.PJ2006217
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