| Autor: |
Medina-Torres, L., Núñez-Ramírez, D. M., González Laredo, R. F., González Lozano, M. A., Alonso, S., Zitzumbo, R., Gallegos-Infante, J. A. |
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| Zdroj: |
Polymer Bulletin; Sep2024, Vol. 81 Issue 14, p12777-12794, 18p |
| Abstrakt: |
An analysis and modeling of the linear viscoelastic behavior of maltenes (M) blended with styrene–butadiene–styrene block copolymer (SBS) are presented in this study. M were mixed with different amounts of SBS (Elastomer, E) (0.25–80 wt%) to investigate the effect of polymer concentration on linear viscoelastic response of the blends; storage and loss moduli were obtained from small amplitude oscillatory shear tests (SAOS). Time–temperature superposition master curves were analyzed by a Maxwell multi-modal model with up to nine relaxation times. Han, Cole–Cole and Van Gurp-Palmen diagrams were prepared from the rheological data. Two different responses were observed: At low E contents, a dispersed system rheological response was observed and verified by microscopy with elastomer as the dispersed phase and maltenes as the matrix, while at high E content the response was that of a co-continuous system. Mixtures with E > 2 wt% exhibited change in their thermomechanical properties with a phase inversion at E > 50 wt%. Furthermore, at low E concentration resins stabilize the dispersed phase by diminishing the magnitude of the viscoelastic moduli, conversely, at high E concentration a swelled polymer-rich phase creates a network that significantly influences of the viscoelastic properties. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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