Estimation of Copolymer/Water Interfacial Tensions Using Pendant Drop Tensiometry

Langmuir : the ACS Journal of Surfaces and Colloids
Florent JasinskiPer B Zetterlund

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.

References

Aug 12, 1999·Journal of Colloid and Interface Science·M H AdãoA C Fernandes
Mar 17, 2001·Advanced Drug Delivery Reviews·K KataokaY Nagasaki
Sep 29, 2009·Colloids and Surfaces. B, Biointerfaces·Miriam Ruiz-PeñaAurora Pérez-Gramatges
Jun 4, 2015·Journal of Colloid and Interface Science·Joseph D BerryRico F Tabor

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Citations

Oct 24, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Guang ChuEyal Zussman
Aug 25, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Erfan SedighiAndrea L Bertozzi

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