| Autor: |
Scola, D. A., Pike, R. A., Vontell, J. H., Pinto, J. P., Brunette, C. M. |
| Zdroj: |
High Performance Polymers; Mar1989, Vol. 1 Issue 1, p17-30, 14p |
| Abstrakt: |
The concept of stabilizing the reactive end-groups in conventional polyimides has been investigated in a novel system. The polyimide investigated was synthesized from 4, 4′-hexafluoroisopropylidenebis (phthalic anhydride) (6F) and 2, 2′-bis[4-(4-aminophenoxyphenyl)] hexafluoro-propane (4-BDAF). The reactive anhydride end-capped and amine end-capped polyimides were imidized and further reacted with several end-capping agents consisting of n-hexylamine, aniline, m-anisidine, phthalic anhydride and p-phenoxyphthalic anhydride to yield non-reactive end-capped polyimides. A comparison of the properties such as inherent viscosity, molecular weight, glass transition temperature, thermal stability, tensile, fracture toughness and complex viscosity of these non-reactive end-capped polyimides with the reactive end-capped polyimides will be presented. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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