Chemical structure/mechanical properties of para-aminostyirene (PAS)-terminated telechelic polyimides - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Polymer Année : 1998

Chemical structure/mechanical properties of para-aminostyirene (PAS)-terminated telechelic polyimides

Résumé

We have synthesized a difunctional model compound PAS-HFDE-PAS, obtained by condensation between a dianhydride (6-HFDA), hexafluoroisopropylidene-2,2′-bis (phthalic acid anhydride) and two mole equivalents of para-aminostyrene (PAS) amines. It was then characterized using spectroscopic and thermal methods, including a kinetic study of monomer reactivity in the temperature range of 100-300°C. The results enabled us to study and characterize two series of PAS-functionalized polyimides synthesized in the laboratory: phenylenediamine (PAS a polyimide) and cardo diamine (PAS polyimide) based. Thermomechanical data obtained with these polyimides showed the presence of two phase transitions, α and β, associated with vitreous transition and with oscillation of phenylenebenzimide structures around the C(CF3)2 flexible linkage of HFDA. A study of chemical structure (determined by 1H and 19F n.m.r.)/properties correlation study was carried out by determining the effect of molar mass and the type of diamine on the thermomechanical properties of telechelic polyimides before cross-linking. © 1998 Elsevier Science Ltd. All rights reserved.

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Chimie
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Dates et versions

hal-01582065 , version 1 (05-09-2017)

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  • HAL Id : hal-01582065 , version 1

Citer

M.-F. Grenier-Loustalotand, Laurent Billon. Chemical structure/mechanical properties of para-aminostyirene (PAS)-terminated telechelic polyimides. Polymer, 1998, 39 (10), pp.1815-1831. ⟨hal-01582065⟩
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