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Rheological characterization of compatibilized polymer blends

Abstract : As the addition of a compatibilizer into a polymer blend dramatically influences the rheology of the system, rheological measurements can be performed to investigate the efficiency of the compatibilizer. This compatibilizer can be a copolymer (either inert such as block copolymers or reactive) or a filler. The rheological behavior of those three different routes of compatibilization is described. One of the main fingerprints of the compatibilization in rheology is the low-frequency modulus. A maximum of G′ at low frequency allows to isolate the optimum effectiveness of the compatibilizer. The relaxation spectra H(λ) versus λ are commonly plotted to identify a third relaxation assigned to the interface between the two polymeric phases. Palierne model is used to evidence the decrease of interfacial tension when adding the compatibilizer. When nanofillers are used as compatibilizers, varying the localization of nanoparticles (NPs) allows for the enhancement of the final properties of the ternary nanocomposite and dynamic rheological measurements can get insight into the localization of the NPs in the blend.
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Aurélie Taguet. Rheological characterization of compatibilized polymer blends. Compatibilization of Polymer Blends, Elsevier, pp.453-487, 2019, 978-0-12-816006-0. ⟨10.1016/B978-0-12-816006-0.00016-5⟩. ⟨hal-02514987⟩



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