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Estimation of copolymer/water interfacial tensions using pendant drop tensiometry

Jasinski, F, Alkhater, a, Thickett, SC ORCID: 0000-0002-8168-3856, Brinkhuis, RH and Zetterlund, PB 2018 , 'Estimation of copolymer/water interfacial tensions using pendant drop tensiometry' , Langmuir, vol. 34, no. 23 , pp. 6835-3843 , doi: 10.1021/acs.langmuir.8b00554.

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Abstract

Copolymer/water interfacial tensions of statistical copolymers of styrene/n-butyl acrylate were estimated by pendant drop tensiometry using an “inverse” configuration according to which a drop of water was formed in toluene/copolymer solutions. The study first involved the precise measurement of copolymer solutions density using pycnometry. Subsequently, interfacial tensions of copolymer solutions against water were plotted as a function of copolymer concentration in toluene. Several methods were explored to fit the experimental data and obtain estimates of copolymer/water interfacial tensions at 100% copolymer concentration in toluene by extrapolation. The Belton−Evans extrapolation resulted in the best fit with the experimental data. When plotted as a function of the styrene composition of the copolymer, the interfacial tensions estimates followed an additivity relationship. This enabled estimation of the copolymer/water interfacial tensions directly from their respective homopolymer/water interfacial tensions values. These results are particularly useful for the prediction of composite particle morphology involving copolymerization of multiple monomers.

Item Type: Article
Authors/Creators:Jasinski, F and Alkhater, a and Thickett, SC and Brinkhuis, RH and Zetterlund, PB
Keywords: interfacial tension, pendant drop tensiometry, copolymers
Journal or Publication Title: Langmuir
Publisher: Amer Chemical Soc
ISSN: 0743-7463
DOI / ID Number: 10.1021/acs.langmuir.8b00554
Copyright Information:

Copyright © 2018 American Chemical Society

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