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Preparation and characteristics of nonflammable polyimide materials

✍ Scribed by Jing Liu; Yan Gao; Fudong Wang; Ming Wu

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
224 KB
Volume
75
Category
Article
ISSN
0021-8995

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✦ Synopsis

The thermal and flame-retardant properties of homo-and copolyimides were evaluated. Those containing sulfone linkages in the backbone were found to be more flame retardant. Both properties were dependent on the composition. A polyimide/ silica nanocomposite was obtained through sol-gel processing. The effects of the addition of silica on the dispersion, interfacial adhesion, fire resistance, mechanical properties, and thermal stability of the composites were investigated. SEM analysis showed a good dispersion of silica with a diameter of 50 -300 nm in the organic matrices. The addition of silica increased the fire retardancy and mechanical properties of the composites.

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