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Artículo

Influence of polydispersity on the viscoelastic properties of linear polydimethylsiloxanes and their binary blends

Ressia, Jorge Aníbal; Villar, Marcelo ArmandoIcon ; Valles, Enrique MarceloIcon
Fecha de publicación: 08/2000
Editorial: Elsevier
Revista: Polymer
ISSN: 0032-3861
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ingeniería Química

Resumen

Linear polydimethylsiloxanes of relatively narrow molecular weight distribution (MWD) were synthesized by anionic polymerization and characterized by different techniques. Binary blends were also prepared with some of the synthesized polymers. Linear viscoelastic parameters, such as storage (G') and loss (G'') moduli, were obtained at different temperatures as functions of frequency (ω). The time temperature superposition principle was applied in order to increase the frequency range measured. Zero-shear rate viscosity (η0), steady-state recoverable compliance (J(e)0) and zero-shear rate first normal stress coefficient (ψ1.0) were calculated from the data corresponding to the terminal relaxation zone. The molecular weight dependence of those parameters shows a good agreement with classical models and previously reported results, although J(e)0 and ψ1.0 are strongly affected by polydispersity. Different polydispersity factors were applied in order to fit the experimental values of the viscoelastic properties with the theory.
Palabras clave: Polydimethylsiloxane , Polydispersity , Steady-State Viscoelastic Properties
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/37713
URL: https://www.sciencedirect.com/science/article/pii/S0032386100000379
DOI: http://dx.doi.org/10.1016/S0032-3861(00)00037-9
Colecciones
Articulos(PLAPIQUI)
Articulos de PLANTA PILOTO DE INGENIERIA QUIMICA (I)
Citación
Ressia, Jorge Aníbal; Villar, Marcelo Armando; Valles, Enrique Marcelo; Influence of polydispersity on the viscoelastic properties of linear polydimethylsiloxanes and their binary blends; Elsevier; Polymer; 41; 18; 8-2000; 6885-6894
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