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Rheologica Acta

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05-09-2017 | Original Contribution

Interfacial activity of reactive compatibilizers in polymer blends

Authors: Fereshteh Karkhaneh-Yousefi, Fatemeh Goharpey, Reza Foudazi

Published in: Rheologica Acta | Issue 10/2017

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Abstract

The influence of a reactive block copolymer compatibilizer on the breakup of polymer fibers in the quiescent conditions is investigated using the breaking thread method (BTM). The compatibilizer is either localized at the interface of two polymers or incorporated in the bulk of thread phase. Moreover, the nominal interfacial tension between two polymers is estimated as a function of compatibilizer concentration for both types of samples using Tomotika theory. It is shown that assembling of compatibilizer molecules at the interface of two immiscible polymers can result in very different dynamic of thread breakup compared to samples containing the compatibilizer in the bulk phase. We observe a reduction in the rate of thread breakup (kinetic of stabilization) when compatibilizer is incorporated in the bulk of thread phase. Such effect is more significant when compatibilizer is localized at the interface of two fluids. Additionally, the mode of thread breakup is sensitive to the compatibilizer location since a beads-on-a-string (BOAS) morphology is observed when compatibilizer is localized at the interface. In conclusion, the usual attribution of interfacial activity of compatibilizer in polymer blends may be originated from their random presence at the interface rather than thermodynamically favored diffusion to the interface.

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Title: Interfacial activity of reactive compatibilizers in polymer blends
Authors: Fereshteh Karkhaneh-Yousefi
Fatemeh Goharpey
Reza Foudazi
Publication date: 05-09-2017
Publisher: Springer Berlin Heidelberg
Published in: Rheologica Acta / Issue 10/2017
Print ISSN: 0035-4511
Electronic ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-017-1034-z

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