الفهرس | Only 14 pages are availabe for public view |
Abstract In the present study a cationic surfactants (quaternary ammonium salts) based of chloranil and chloranil dioxime derivative were prepared. The quaternary ammonium salts were prepared from the reaction of chloroanil with secondary amines then quaternaized by hexadecyl bromide. The chloroanil dioxime derivative was prepared via the reaction of chloroanil and hydroxyl amine hydrochloride.The structures of the prepared quaternary ammonium salts and the dioxime derivative were inferred from microanalytical and spectral data. Polyester /bentonite Composites (A), Polyester / (nano bentonite) nano Composites (B), Polyester/ (Nano Bentonite)/QAS (IV) nano composites at (5%) (C), Polyester / (nano bentonite)/QAS (V) nano composites at (5%) (D) and Polyester/(nano bentonite)/dioxime (VI) nano composites at (5%) (E) were fabricated by hand-lay-up method and cured at room temperature and atmospheric pressure . Nine percentages of ( 0%, 1%, 2%, 3%, 4%, 5%, 6%, 10%, 20% ). Evaluation of mechanical, thermal properties (DSC and TGA) and morphological properties in testing such structures (SEM) of all prepared composites were reported. SUMMARY xii All the mechanical and thermal properties were found to increase with increase loading % wt. of different type of filler and show maximum at 5% wt., but these properties decrease with increase more than 5% wt., which act as stress concentrators on the composite surface and show decrease of the composites performance enhancements due to indicating the highest viscosity of composites. Organic modification by adding quaternary ammonium salts (cationic surfactants) to nano bentonite powder show high surface area promise to improve mechanical and thermal properties of nano composites (B). This effect was observed in the SEM micrographs as higher degrees of organo clay exfoliation and well-dispersed in polyester and give nano composite with uniform appearance, homogenous structure. In general modification by adding surfactant to nano bentonite powders give nano composites (C) which show optimum mechanical and thermal properties |