Preparation of polyimide-silica hybrid materials by high pressure-thermal polymerization
- Tokyo Inst. of Tech. (Japan). Dept. of Organic and Polymeric Materials
Polyimide-silica hybrid materials were prepared via a modified sol-gel, high pressure-thermal polymerization procedure. Precursor monomer salts were made from ethanol soluble 2,5-diethoxycarboxyl terephthalic acid (p-PME) and either a disiloxanediamine, an aliphatic diamine (1,9 diaminononane) or combinations of the two. Solutions of tetramethoxysilane (TMOS) and monomer salt were transformed into a gel, dehydrated, and the resulting powders were subjected to high pressure and thermal polymerization and transformed into a polyimide-silica composite. By varying the TMOS content, and/or the siloxane to aliphatic diamine ratio, composites of 0 to 100 wt% SiO{sub 2} were made. The silica morphology changed significantly with siloxane/aliphatic PI ratio. Reaction mechanisms, thermal and physical properties and composite morphologies are discussed.
- OSTI ID:
- 427693
- Report Number(s):
- CONF-960401-; ISBN 1-55899-338-X; TRN: IM9708%%19
- Resource Relation:
- Conference: Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996; Other Information: PBD: 1996; Related Information: Is Part Of Better ceramics through chemistry 7: Organic/inorganic hybrid materials; Coltrain, B.K. [ed.] [Eastman Kodak Co., Rochester, NY (United States)]; Sanchez, C. [ed.] [Univ. Pierre et Marie Curie, Paris (France)]; Schaefer, D.W. [ed.] [Sandia National Labs., Albuquerque, NM (United States)]; Wilkes, G.L. [ed.] [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)]; PB: 695 p.; Materials Research Society symposium proceedings, Volume 435
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COMPOSITE MATERIALS
SOL-GEL PROCESS
POLYMERIZATION
HARDNESS
MORPHOLOGY
SILICA
IMIDES
POLYMERS
MONOMERS
AMINES
SILANES
CONCENTRATION RATIO
CHEMICAL REACTIONS
THERMAL GRAVIMETRIC ANALYSIS
DIFFERENTIAL THERMAL ANALYSIS
CALORIMETRY
FOURIER TRANSFORM SPECTROMETERS
INFRARED SPECTRA
NUCLEAR MAGNETIC RESONANCE
SCANNING ELECTRON MICROSCOPY
EXPERIMENTAL DATA