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Development of novel coatable compatibilized polyimide-modified silica nanocomposites
- Development of novel coatable compatibilized polyimide-modified silica nanocomposites
- Akhter, T[Akhter, Toheed]; Siddiqi, HM[Siddiqi, Humaira Masood]; Saeed, S[Saeed, Shaukat]; Park, OO[Park, O. Ok]; Mun, SC[Mun, Sung Cik]
- DGIST Authors
- Park, OO[Park, O. Ok]
- Issue Date
- Journal of Polymer Research, 21(5)
- Article Type
- Chemical Interactions; Chemical Modification; Coatable Polyimide; Hybrid Systems; Hydrogen Bonds; Interfacial Interaction; Like-Like Chemical Interactions; Modified Silica; Modified Silica Reinforcement; Nanocomposites; Organic Modification; Phase Connectivities; PI-SiO2 Composites; Polyimide; Polyimides; Pyromellitic Dianhydride; Reinforcement; Silica; Silica Nanocomposites; Structural Similarity
- A series of novel coatable polyimide silica (PI-SiO2) nanocomposites have been synthesized. A new PI matrix, containing pendant hydroxyl groups, was prepared reacting diamine monomers (4,4'-diamino-4"- hydroxytriphenylmethane, and 4,4'- oxydianiline) and pyromellitic dianhydride (PMDA). Whereas, silica reinforcement was generated using TEOS. A coupling oligomeric species 2,6-bis(3-(triethoxysilyl)propyl)pyrrolo[3,4- f]isoindole-1,3,5,7(2H,6H)-tetraone (APA) was used to furnish silica nanoparticles with imide linkages and hydroxyl groups. As these groups are already present in PI matrix, so their presence in nanoparticles brought structural similarity, and hence enhanced phase connectivity among two phases. The resulting PI-SiO2 hybrids, with improved interfacial interactions through hydrogen bonding and like-like chemical interactions, displayed much enhanced morphological, thermomechanical, and thermal properties. The properties of resulting hybrids were studied by various advanced techniques and compared with PI-SiO2 hybrid system which was prepared from same polyimide and unmodified silica network.© Springer Science+Business Media Dordrecht 2014.
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