The relation between the alpha/beta relaxation dynamics and the shape of ionomer building blocks
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2018
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CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.
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The relation between the alpha/beta relaxations and the shape of the building blocks
of ionomer materials is a key factor for programming an important temperaturedependent
property: the memory of shape [1,2,3]. However, the morphology of
ionomers is indirectly obtained via modeling of small angle X-ray scattering (SAXS)
data owing to the hardly accessible image characterization of the nanometric building
blocks - micelle-like cylindrical polymeric aggregates (radius ~ 2 - 6 nm and length >
100 nm) [3]. Herein, broadband dielectric spectroscopy (BDS) measurements, free
from electrode polarization effects, allowed identifying the time and temperature
dependence of the polarization of different length scales of the ionomer matrix, and
more importantly, by directly providing the aspect ratio of the radius and length of the
polymeric aggregates for each desired temperature. This finding is essential for
controlling the shape of ionomer based functional products under several stimuli
conditions, thereby advancing remarkable applications, such as four dimensional (4D)
printing and polymer electrolyte fuel cells.
Como referenciar
MATOS, B.R.; REY, J.F.Q.; MERINO, D.H.; SILVA, J.S. da; SCHADE, U.; PUSKAR, L.; FONSECA, F.C. The relation between the alpha/beta relaxation dynamics and the shape of ionomer building blocks. In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23., 04-08 de novembro, 2018, Foz do Iguaçu, PR. Resumo... p. 8629-8629. Disponível em: http://repositorio.ipen.br/handle/123456789/29674. Acesso em: 12 May 2024.
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.