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@Article{OliveiraJúniorRoMaGuBaRe:2017:StApEv,
               author = "Oliveira J{\'u}nior, Mauro Santos de and Rodrigues, Bruno 
                         Vin{\'{\i}}cius Manzolli and Marcuzzo, Jossano Saldanha and 
                         Guerrini, Lilia M{\"u}ller and Baldan, Maur{\'{\i}}cio Ribeiro 
                         and Rezende, Mirabel Cerqueira",
          affiliation = "{Universidade Federal de S{\~a}o Paulo (UNIFESP)} and 
                         {Universidade Brasil} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal de S{\~a}o Paulo 
                         (UNIFESP)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Universidade Federal de S{\~a}o Paulo (UNIFESP)}",
                title = "A statistical approach to evaluate the oxidative process of 
                         electrospun polyacrylonitrile ultrathin fibers",
              journal = "Journal of Applied Polymer Science",
                 year = "2017",
               volume = "134",
               number = "43",
                pages = "Article number 45458",
                month = "Nov.",
             keywords = "electrospinning, nanostructured polymers, synthesis and processing 
                         techniques, thermal properties.",
             abstract = "A systematic study using design of experiments was applied in 
                         order to map out the thermal stabilization of electrospun 
                         polyacrylonitrile mats and to investigate how oxidation and 
                         cyclization reactions are affected by rate, temperature, and time 
                         in an oxidative environment. Cyclization indexes were estimated by 
                         a simple methodology based on differential scanning calorimetry 
                         (DSC) and Fourier transform infrared spectroscopy data. Values of 
                         enthalpy and relative intensities of bands assigned to 
                         C\N and C\N bonds were used on calculation. The 
                         statistical planning applied in this study was important to show 
                         that not always longest treatment is effective to stabilize 
                         polyacrylonitrile, but also samples obtained in less than 3 h 
                         presented low values of exothermic peak on DSC, values of 
                         cyclization indexes near to 90%, both from DSC and Fourier 
                         transform infrared spectroscopy techniques, reduced weight loss in 
                         thermogravimetric analysis and O/C ratio higher than 10% by X-ray 
                         photoelectron spectroscopy, that are appreciated characteristics 
                         to a precursor of high-performance carbon materials.",
                  doi = "10.1002/app.45458",
                  url = "http://dx.doi.org/10.1002/app.45458",
                 issn = "0021-8995 and 1097-4628",
             language = "en",
           targetfile = "Junior_et_al-2017-Journal_of_Applied_Polymer_Science.pdf",
        urlaccessdate = "28 nov. 2020"
}


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