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Estimation of copolymer/water interfacial tensions using pendant drop tensiometry


Jasinski, F and Alkhater, A and Thickett, SC and Brinkhuis, RH and Zetterlund, PB, Estimation of copolymer/water interfacial tensions using pendant drop tensiometry, Langmuir, 34, (23) pp. 6835-3843. ISSN 0743-7463 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 American Chemical Society

DOI: doi:10.1021/acs.langmuir.8b00554


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 Details

Item Type:Refereed Article
Keywords:interfacial tension, pendant drop tensiometry, copolymers, surface free-energies, macromolecular systems, polymer, morphology, density, water, polyethylene, adsorption, particles, micelles
Research Division:Chemical Sciences
Research Group:Physical chemistry
Research Field:Colloid and surface chemistry
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Thickett, SC (Associate Professor Stuart Thickett)
ID Code:127410
Year Published:2018
Funding Support:Australian Research Council (LP140100119)
Web of Science® Times Cited:3
Deposited By:Chemistry
Deposited On:2018-07-26
Last Modified:2019-03-06

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