@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 = "27 abr. 2024"
}