Structural and Thermal Characterisation of Nadimide Resins |
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Authors: | S Alam L D Kandpal G N Mathur |
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Institution: | (1) Defence Materials and Stores Research and Development Establishment, DMSRDE P.O., G.T. Road, Kanpur, 208 013, India |
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Abstract: | A series of hexachloronadimides containing phosphine oxide in the backbone were synthesized by the reaction of bis(3-amino
phenyl) methyl phosphine oxide (BAP) with pyromellitic dianhydride (PMDA)/3,3’,4,4’-benzophenone tetracarboxylic acid dianhydride
(BTDA)/2,2-bis(3,4-dicarboxy phenyl) hexafluoropropane dianhydride (6F) and hexachloronadic anhydride in glacial acetic acid/acetone.
Structural characterisation of the resins was carried out by infrared, nuclear magnetic resonance spectroscopy and elemental
analysis. Thermal characterisation of uncured resin was done by differential scanning calorimetry and thermogravimetric analysis.
The decomposition temperature of uncured resins were above 310±10°C with T
max 330±10°C in nitrogen atmosphere. Char yield at 800°C ranged from 37–42%.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | chair yield curing DSC hexachloronadimides IR NMR TG |
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