Preparation of polystyrene/montmorillonite nanocomposites: optimization by response surface methodology (RSM)

Authors : S Erdem YALÇINKAYA, Nuray YILDIZ, Mehmet SAÇAK, Ayla ÇALIMLI

Pages : 581-592

Doi:10.3906/sag-1206-28

View : 22 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Preparation of polystyrene insert ignore into journalissuearticles values(PS);-montmorillonite nanocomposites was carried out in 3 steps: purification and determination of the cation exchange capacity insert ignore into journalissuearticles values(CEC); of clay, synthesis of organoclay, and preparation of nanocomposites. In organoclay synthesis, 3 types of surfactants, long-chained insert ignore into journalissuearticles values(cetyltrimethylammonium bromide insert ignore into journalissuearticles values(CTAB););, short-chained insert ignore into journalissuearticles values(tetraethylammonium bromide insert ignore into journalissuearticles values(TEAB););, and ringed insert ignore into journalissuearticles values(benzyltriethylammonium bromide insert ignore into journalissuearticles values(BTEAB););, were used. Gallery distances of pure clay and organoclays insert ignore into journalissuearticles values(CTAB-O, TEAB-O, and BTEAB-O); were determined by X-ray diffraction insert ignore into journalissuearticles values(XRD); analysis as 1.25, 2.09, 1.52, and 1.63 nm, respectively. Preparation of nanocomposites was carried out by in situ polymerization. Composites, containing 2%, 4%, and 6% organoclay by mass, were characterized by XRD, thermogravimetric analysis insert ignore into journalissuearticles values(TGA);, gel permeation chromatography insert ignore into journalissuearticles values(GPC);, and transmission electron microscope insert ignore into journalissuearticles values(TEM);. The synthesized nanocomposites showed an exfoliated structure and a higher decomposition temperature in comparison with pure PS. A new approach was tried in nanocomposite preparation using response surface methodology insert ignore into journalissuearticles values(RSM);.
Keywords : Montmorillonite, organoclays, polymer, polystyrene, nanocomposites, RSM