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Description of the Droplet Size Evolution in Flowing Immiscible Polymer Blends

Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského Náměstí 2, CZ 162 06 Praha 6, Czech Republic
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Polymers 2019, 11(5), 761; https://doi.org/10.3390/polym11050761
Received: 25 March 2019 / Revised: 23 April 2019 / Accepted: 25 April 2019 / Published: 30 April 2019
(This article belongs to the Special Issue Multiphase Structure of Polymeric Materials and Physical Properties)
Control of the phase structure evolution in flowing immiscible polymer blends during their mixing and processing is fundamental for tailoring of their performance. This review summarizes present state of understanding and predictability of the phase structure evolution in flowing immiscible polymer blends with dispersed structure. Results of the studies of the droplet breakup in flow, important for determination of the droplet breakup frequency and of the size distribution of the daughter droplets, are reviewed. Theories of the flow-induced coalescence providing equations for collision efficiency are discussed. Approximate analytic expressions reliably describing dependence of the collision efficiency on system parameters are presented. Available theories describing the competition between the droplet breakup and coalescence in flow are summarized and approximations used in their derivation are discussed. Problems with applicability of available theories on prediction of the droplet size evolution during mixing and processing of immiscible polymer blends, which have not been broadly discussed so far, are addressed. View Full-Text
Keywords: polymer blends; phase structure; droplet breakup; coalescence; interfacial tension polymer blends; phase structure; droplet breakup; coalescence; interfacial tension
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MDPI and ACS Style

Fortelný, I.; Jůza, J. Description of the Droplet Size Evolution in Flowing Immiscible Polymer Blends. Polymers 2019, 11, 761.

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