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Memorias de investigación
Ponencias en congresos:
Molecular model for the diffusion of associating telechelic polymer networks
Año:2017
Áreas de investigación
  • Macromoléculas y polímeros
Datos
Descripción
Understanding the mechanisms of motion and stress relaxation of associating polymers at the molecular level is critical for advanced technological applications such as enhanced oil-recovery, self-healing materials or drug delivery. In associating polymers, the strength and rates of association/dissociation of the reversible physical crosslinks govern the dynamics of the network and therefore all the macroscopic properties, like self-diffusion and rheology. Recently, by means of forced Rayleigh scattering experiments, we have proved that associating polymers of different architectures show super-diffusive behavior when the free motion of single molecular species is slowed down by association/dissociation kinetics. Here we discuss a new molecular picture for unentangled associating telechelic polymers that considers concentration, molecular weight, number of arms of the molecules and equilibrium and rate constants of association/dissociation. The model predicts super-diffusive behavior under the right combination of values of the parameters. We discuss some of the predictions of the model using scaling arguments, show detailed results from Brownian dynamics simulations of the FRS experiments, and attempt to compare the predictions of the model to experimental data.
Internacional
Si
Nombre congreso
American Physical Society March Meeting 2017
Tipo de participación
960
Lugar del congreso
Nueva Orleans, EE.UU.
Revisores
Si
ISBN o ISSN
DOI
Fecha inicio congreso
13/03/2017
Fecha fin congreso
18/03/2017
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Título de las actas
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Jorge Ramirez Garcia (UPM)
  • Autor: Thomas J. Dursch (Massachusetts Institute of Technology)
  • Autor: Bradley D. Olsen (Massachusetts Institute of Technology)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Polímeros, Caracterización y Aplicaciones
  • Departamento: Ingeniería Química Industrial y del Medio Ambiente
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