Статья

Characterization of in situ prepared nanocomposites of PS and TIO<sub>2</sub> nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length

Enis S. DžunuzovićFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11000, SerbiaJasna V. DžunuzovićInstitute of Chemistry, Technology and Metallurgy (ICTM), Center of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade 11000, SerbiaTijana S. RadomanInnovation center of the Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11000, SerbiaMilena Marinović‐CincovićVinca Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade 11000, SerbiaLjubiša NikolićFaculty of Technology, University of Niš, Bulevar Oslobodjenja 124, Leskovac 16000, SerbiaKatarina JeremićFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade 11000, SerbiaJovan M. NedeljkovićVinca Institute of Nuclear Sciences, University of Belgrade, P.O. Box 522, Belgrade 11000, Serbia

2013en

ABI

Аннотация

Abstract Incorporation of surface modified TiO 2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO 2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8–C16). FTIR and UV‐Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO 2 nanoparticles in PS was achieved when the TiO 2 surface was modified with octyl gallate. The presence of surface modified TiO 2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo‐oxidative stability of PS were significantly improved by incorporation of surface modified TiO 2 nanoparticles. The most pronounced improvement of thermal and thermo‐oxidative stability was observed for TiO 2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013. © 2013 Society of Plastics Engineers

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Идентификаторы

DOI: 10.1002/pc.22423

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