Preparation and volume change of polyimide gels
โ Scribed by Jionghao He; Takashi Yamashita; Kazuyuki Horie
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 463 KB
- Volume
- 199
- Category
- Article
- ISSN
- 1022-1352
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A polyimide powder was prepared from 3,3',4,4'-biphenyl tetracarboxylic dianhydride (BPDA) and 4,4'-oxydianiline (ODA). Polyimide powder having low molecular weight was prepared by imidizing low-molecular-weight polyamic acid. The molecular weight of this polyimide powder increased on heating in a s
Organosoluble polyimide/silica hybrid materials were prepared using the sol-gel process. The organosoluble polyimide was based on pyromellitic anhydride (PMDA) and 4,4ะ-diamino-3,3ะ-dimethyldiphenylmethane (MMDA). The silica particle size in the hybrid is increased from 100 -200 nm for the hybrid co