Structural stability of pan fiber under high electron beam radiation doses
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2009
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st
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Fiber-reinforced composite are an important class of engineering material. A relevant task of composite
technology in order to produce materials for structures of high mechanical performance is to obtain the best
carbon fiber. One of the main ways to produce carbon fibers of high Young`s modulus and tensile strength is to
use as starting material polyacrylonitrile (PAN) fibers which after a rigorous and carefully thermal process
become carbon fibers. Since some chemical modifications produced in the thermal treatment can be induced by
ionizing radiation, the aim of this paper is to evaluate the effect of high electron beam (EB) doses on a
commercial PAN fiber in order to evaluate the use of this technology as an alternative treatment to improve the
properties and characteristics of the produced carbon fiber. The doses applied were: 0.2, 0.4, 0.6, 0.8, 1.0 and
1.2 MGy. The irradiation effects induced on the PAN fiber were evaluated by Fourier transform infrared
spectroscopy (FTIR), differential scanning calorimetry (DSC) and termogravimetry (TG). FTIR obtained data
have shown that the main functional groups remain practically unchanged in the non-irradiated and irradiated
samples. The single DSC exothermic peak obtained for non-irradiated sample, becomes a double peak after the
irradiation, presenting lower initial and higher final temperatures for exothermic DSC curves. The enthalpy
involved in the chemical reaction decreases for irradiated samples as compared with the non-irradiated PAN
fiber. TG data have shown that irradiated samples start a decomposition process at lower temperatures compared
to the non-irradiated sample.
Como referenciar
PINO, EDDY S.; ARRUDA, CLARISSA P.Z. de; MACHADO, LUCI D.B.; CARVALHO, ALVARO A.S. de; GIOVEDI, CLAUDIA. Structural stability of pan fiber under high electron beam radiation doses. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/11968. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.