{"title":"Characterization of Gamma Irradiated PVDF and PVDF\/Graphene Oxide Composites by Spectroscopic Techniques","authors":"Juliana V. Pereira, Adriana S. M. Batista, Jefferson P. Nascimento, Clasc\u00eddia A. Furtado, Luiz O. Faria","volume":110,"journal":"International Journal of Materials and Metallurgical Engineering","pagesStart":173,"pagesEnd":177,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10003492","abstract":"The combination of the properties of graphene oxide
\r\n(OG) and PVDF homopolymer makes their combined composite
\r\nmaterials as multifunctional systems with great potential. Knowledge
\r\nof the molecular structure is essential for better use. In this work, the
\r\ndegradation of PVDF polymer exposed to gamma irradiation in
\r\noxygen atmosphere in high dose rate has been studied and compared
\r\nto degradation of PVDF\/OG composites. The samples were irradiated
\r\nwith a Co-60 source at constant dose rate, with doses ranging from
\r\n100 kGy to 1,000 kGy. In FTIR data shown that the formation of
\r\noxidation products was at the both samples with formation of
\r\ncarbonyl and hydroxyl groups amongst the most prevalent products
\r\nin the pure PVDF samples. In the other hand, the composites samples
\r\nexhibit less presence of degradation products with predominant
\r\nformation of carbonyl groups, these results also seen in the UV-Vis
\r\nanalysis. The results show that the samples of composites may have
\r\ngreater resistance to the irradiation process, since they have less
\r\ndegradation products than pure PVDF samples seen by spectroscopic
\r\ntechniques.","references":"[1] J. Yu, P. Jiang, C. Wu, L. Wang, X. Wu, \u201cGraphene nanocomposites\r\nbased on poly(vinylidene fluoride): structure and properties\u201d in Polymer\r\nComposites, 2011, pp. 1484 \u2013 1490.\r\n[2] G. Botelho, S. Lanceros-Mendez, A.M. Gon\u00e7alves, V. Sencadas, J.G.\r\nRocha, \u201cRelationship between processing conditions, defects and\r\nthermal degradation of poly(vinylidene fluoride) in the \u03b2-phase\u201d in\r\nJournal of Non-Crystalline Solids, vol. 354, 2008, pp.72-78.\r\n[3] M.M. Nasef, H. Saidi, K.Z.M. Dahlan, \u201cInvestigation of electron\r\nirradiation induced-changes in poly(vinylidene fluoride) films\u201d in\r\nPolymer Degradation and Stability, vol. 75, 2002, pp. 85-92.\r\n[4] C. Yu, D. Li, W. Wu, C. Luo, Y. Zhang, C. Pan, \u201cMechanical property\r\nenhancement of PVDF\/grapheme composite based on a high-quality\r\ngrapheme\u201d in Journal Materials Science, vol. 49, 2014, pp. 8311-8316.\r\n[5] T. Kuilla, S. Bhadra, D. Yao, N. H. Kim, S. Bose, J. H. Lee, \u201cRecent\r\nadvances in grapheme based polymer composites\u201d in Progress in\r\nPolymer Science, vol. 35, 2010, pp. 1350 \u2013 1375.\r\n[6] B. Zhang, L. Li, Z. Wang, S. Xie, Y. Zhang, Y. Shen, M. Yu, B. Deng,\r\nQ. Huang, C. Fan, J. Li, \u201cRadiation induced reduction: an effective and\r\nclean route to synthesize functionalized graphene\u201d in Journal of\r\nMaterials Chemistry, vol. 22, 2012, pp. 775 \u2013 7781.\r\n[7] A. S. Medeiros, L. O. Faria, \u201cHigh gamma dose response of\r\npoly(vinylidene fluoride) copolymers\u201d, in Nuclear Instruments and\r\nMethods in Physics Research, Section B, Beam Interactions with\r\nMaterials and Atomis (Print), v. 268, 2010, pp. 2740 \u2013 2743.\r\n[8] F. T. Thema,1 M. J. Moloto,1 E. D. Dikio,1 N. N. Nyangiwe, L.\r\nKotsediM. Maaza, M. Khenfouch, \u201cSynthesis and Characterization of\r\nGraphene Thin Films by Chemical Reduction of Exfoliated and\r\nIntercalated Graphite Oxide\u201d, in Journal of Chemistry, 2013, pp. 1-6.\r\n[9] S. Boullier, A. Esnouf. Le Mo\u00ebl, \u201cRadiooxidation of fluoropolymers:\r\nidentification of oxidation products\u201d, in Journal of Polymer Science Part\r\nB Polymer Physics, vol. 41, 2003, pp. 1509\u20131517. [10] Z. Zhudi, Y. Wenxue, C. Xinfang, \u201cStudy on increase in crystallinity in\r\n\u03b3 \u2013 irradiated poly(vinylidene fluoride)\u201d in Radiation Physics and\r\nChemistry, vol. 65, 2002, pp. 173 \u2013 176.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 110, 2016"}