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| Content Provider | Springer Nature Link |
|---|---|
| Author | López Nava, Ramón Vázquez More, Flavio S. Palí Casava, Ramón Aguilar Vega, Manuel |
| Copyright Year | 2002 |
| Abstract | Three isomeric aromatic Polyamides were synthesized using as a basis 4,4'-(9-fluorenylidene) diamine and different phtalic diacid chlorides. The influence of structural changes on Polyamide properties when the phthalic moiety changed from para linked, poly(fluoreny1idene terephthaloyl amide), BFA/TERE, to meta linked, poly(fluoreny1idene isophthaloyl amide), BFA/ISO, phenyl substitution or meta linked phenyl Substitution with a large Pendant group, poly(fluoreny1idene tertbutyl isophthaloyl amide), BFA/TERT, on these Polyamides were assessed. Thermal properties measurements indicate that BFA/TERE has the highest thermal decomposition temperature above 450° and Tg, while BFA/ISO and BFA/TERT have thermal properties that are only slightly lower. Gas permeability coefficients of the three isomeric aromatic Polyamides were measured at different temperatures. The results indicate that BFA/TERT has the largest permeability and diffusion coefficients while BFA/ISO Shows the lowest. These results are attributed to a larger fractional free volume in the former compared to the later. Permeability coefficients for all gases tested Show an Arrhenius type behavior with temperature for these aromatic polyamides. |
| Starting Page | 165 |
| Ending Page | 172 |
| Page Count | 8 |
| File Format | |
| ISSN | 01700839 |
| Journal | Polymer Bulletin |
| Volume Number | 49 |
| Issue Number | 2-3 |
| e-ISSN | 14362449 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2002-11-01 |
| Publisher Place | Berlin Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics |
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