Synthesis and properties of polyimide silver nanocomposite containing dibenzalacetone moiety in the main chain

الملخص EN

A new thermally stable polyimide–silver Nano composite containing dibenzalacetone moiety in the main chain was synthesized by a convenient ultraviolet irradiation technique.

A precursor such as AgNO3 was used as the source of the silver nanoparticles.

Polyimide 6 as a source of polymer was prepared by polycondensation reaction of 2, 5-bis(4-aminobenzylidene) cyclopentanone 4with pyromellitic anhydride 5 in m-cresol solution and in the presence of iso-quinoline as a base.

The resulting nanocomposite film was characterized by FTIR spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM), Thermal gravimetric analyses (TGA), differential gravimetric analyses (DTG) and differential scanning calorimetry (DSC).

Scanning electron microscopy (SEM) confirmed the formation and dispersion of silver nanoparticles in polymer 20 nm.

Incorporation of inorganic metal silver nanoparticles has matrix having average size of improved the thermal behavior of the Nano composite film as compared to pure polyimide film.

Also 2, 5 bis (4-aminobenzylidene) cyclopentanone 4 was synthesized by using a two-step reaction.