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    Functionalization of Polystyrene and Adhesion Studies
    (VSP BV, 1997) Kurbanova, R. A.; Mirzaoğlu, R.; Kurbanov, S.; Karataş, I.; Pamuk, V.; Özcan, E.; Okudan, A.; Güler, E.
    The adhesion capability of novel functional polystyrenes to metals and their capability to provide corrosion resistance to metals under various conditions have been investigated. The polyfunctional polystyrenes were prepared via reaction of the polystyrene with different functional groups [2-methyl-2,3-epoxy-6-octene-4-one (I), 2-methyl-2, 3-epoxy-5,7-nonadien-4-one (II), 1-chloro-2,3-epoxy-5-chloromethyl-5-hexene (III), 1-(Delta(3)-tetrahydrobenzaldoxime)-2,3-epoxy propane (IV), and maleic anhydride (V)] in the presence of catalysts. The results show that the addition of functional groups to the polystyrene increases its adhesion capability and corrosion resistance. This increase is attributed to the quantity and nature of the functional groups bonded to polystyrene.
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    Side-chain Functionalization of Polystyrene with Maleic Anhydride in the Presence of Lewis Acids
    (JOHN WILEY & SONS INC, 1996) Kurbanova, R. A.; Mirzaoğlu, R.; Akovalı, G.; Rzaev, Zakir M. O.; Karataş, I.; Okudan, Ahmet
    Polystyrenes with different molecular weights were chemically modified with maleic anhydride by use of certain cationic catalysts of Lewis acid type (BF3 . OEt(2), AlCl3, TiCl4, ZnCl2, FeCl3, and SnCl4) in chloroform. The effects of molecular weight of polystyrene, as well as type of Lewis acid used, on properties and structure of products were investigated. The interrelation between the molecular weight of polystyrene and content of carboxyl groups in the products was made. A direct relationship between the activity of catalyst used and the number of carboxyl groups was found. For characterization of side-chain functionalized polystyrene, fractional precipitation was applied which yielded carboxyl groups in all fractions. The carboxyl group concentrations were found to be the highest in the case of BF3 . OEt(2). Modified polystyrene samples containing - CO - CH = CH - COOH fragments in side chains are easily crosslinked at 140-150 degrees C and by UV irradiation as proved by IR, DTA, and TGA analyses. Functionalized polymers obtained are characterized by their high thermostability, adhesion, and photosensitivity.