Synthesis and antioxidant activity screening of new poly (imide-sulfonate) S have Schiff base linkage

A series of new poly (imide-sulfonate)s polyimides involving Schiff base moiety have synthesized via multistep synthesis. The first step involved reaction of pyromellitic anhydride with aniline producing bis (N-phenyl) pyromelltamic acid (1) which was subsequently dehydrated to the corresponding bis...

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Bibliographic Details
Main Authors: Ali, Mustafa Dawood Mohammed, Al-Azzawi, Ahlam Marouf
Format: Conference Proceeding
Language:English
Subjects:
Aldehydes
Aniline
Antioxidants
Condensation polymerization
Dehydration
Diols
Imines
Ketones
Methylene dianiline
NMR
Nuclear magnetic resonance
Polyimide resins
Polymers
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Summary:A series of new poly (imide-sulfonate)s polyimides involving Schiff base moiety have synthesized via multistep synthesis. The first step involved reaction of pyromellitic anhydride with aniline producing bis (N-phenyl) pyromelltamic acid (1) which was subsequently dehydrated to the corresponding bis (N-phenyl) pyromelltimide (2) via fusion method. The synthesized imide (2) reacted with chlorosulfonic acid in the third step to produce bis N-(phenyl) pyromelletimide sulphonyl chloride (3). In the fourth step four diols was synthesized by condensation of 4,4'-methylenedianiline with four hydroxyl substituted aldehydes and ketones producing new diols (4-7) and these inturn were introduced successfully in condensation polymerization with monomer (3) affording the desired new polymers (8-11). The newly synthesized compounds and polymers were characterized through spectral data including FT-IR, 1H-NMR and 13C-NMR. Antioxidant activity of new polymers (8-11) was measured using stable DPPH radicals.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0027399