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  • Küçük Resim
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    Effects of the Functional Groups of Polystyrene on Its Adhesion Improvement and Corrosion Resistance
    (VSP BV, 1998) Kurbanova, R.; Okudan, A.; Mirzaoğlu, R.; Kurbanov, S.; Karataş, İ.; Ersöz, M.; Özcan, E.; Ahmedova, G.; Pamuk, V.
    Novel functionalized polystyrenes having groups such as epichlorohydrin, epoxy, acetyl, C=C double bond, and carboxyl were synthesized by the reaction of polystyrene with epichlorohydrin, unsaturated hydrocarbons, and organic anhydrides in the presence of Lewis acid catalysts. The adhesion capability and corrosion resistance of the new synthesized functionalized polystyrenes to metals under various conditions were investigated. A very good relationship was observed between the quantity of functional groups bonded to the aromatic rings of the polystyrenes and the adhesion and corrosion resistance properties of the polyfunctionalized polystyrenes. It was also observed that the new polyfunctionalized polystyrenes obtained by chemical modification with maleic anhydride, acetic anhydride, isoprene, butadiene, and epichlorohydrin in the presence of cationic catalysts resulted in high adhesion and anti-corrosion properties.
  • Küçük Resim Yok
    Öğe
    The Interaction of Epoxy Toluene Oligomer Containing Chloromethyl Groups and P-Tert-Butylcalix[6]Arene
    (MARCEL DEKKER INC, 1995) Yıldız, S.; Vural, U. S.; Kurbanova, R.
    Oligomeric toluene material which has epoxy group (ETO) was prepared through reaction of toluene and epichlorohidrine in the presence of BF3. Epoxy toluene oligomere containing chloromethyl groups (ETOC) was synthesized from the treatment of NaOH and ETO for 6-8 hours. The macromolecular derivative of oligomer, (ETOC-I-6) was obtained from the reaction of ETOC and p-tert-butylcalix[6]arene (I-6) in the presence of CH3ONa. When the concentration of ETOC is greater than I-6, the reaction was observed as pseudo first order, benzene was used as solvent. The activation energy and rate constant of the reaction were calculated as 25.082 kj . mol(-1) and 3.155.10(-5) s(-1), respectively. The amounts of chlorine in ETOC-I-6 was determined 6.37% by Schoniger Method, and its molecular weight was determined as 2778.84 g . mol(-1) by cryoscopic method using benzene as solvent.