Preparation of polyimide-silica hybrid materials by high pressure-thermal polymerization

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:427693

Gaw, K; Suzuki, Hironori; Jikei, Mitsutoshi; Kakimoto, Masaaki; Imai, Yoshio ^[1]

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1. 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
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AMINES
CALORIMETRY
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CONCENTRATION RATIO
DIFFERENTIAL THERMAL ANALYSIS
EXPERIMENTAL DATA
FOURIER TRANSFORM SPECTROMETERS
HARDNESS
IMIDES
INFRARED SPECTRA
MONOMERS
MORPHOLOGY
NUCLEAR MAGNETIC RESONANCE
POLYMERIZATION
POLYMERS
SCANNING ELECTRON MICROSCOPY
SILANES
SILICA
SOL-GEL PROCESS
THERMAL GRAVIMETRIC ANALYSIS