Gas permeability coefficients of a series of aromatic polyetherimides, which were prepared from 1,4-bis(3,4-dicarboxyphenoxy) benzene dianhydride (HQDPA) and various aromatic diamines, to H, , CO, , 0, , N, and CH, have been measured under 7 atm pressure and over the temperature range 30-150ยฐC. A si
โฆ LIBER โฆ
Gas permeability in polyimides from oxydianiline and isomeric thiaphthalic dianhydride or 1,4-bis(dicarboxyphenoxy) benzene dianhydride
โ Scribed by Yusheng Li; Mengxian Ding; Jiping Xu
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 406 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0032-3861
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The gas transport properties of a series polyetherimides, which were prepared from 1,4his(3,4-dicarboxyphenoxy )benzene dianhydride (HQDPA) with l,3-phenylenediamine or 3,5-diaminobenzic acid (DBA) or its esters are reported. The effects of carboxylic group ( -COOH) and carboxylic ether groups ( -CO