Polydnonomethyl itaconate) as subphase stabilizer of maleic anhydride-alt-stearyl methacrylate monolayers at the air-water interface. The study on surface pressure-area isotherms

L. Gargallo; B. Miranda; A. Leiva; D. Radić

Published : 2022-09-19

Vol. 46 No. 11-12 (2001)

Polydnonomethyl itaconate) as subphase stabilizer of maleic anhydride-alt-stearyl methacrylate monolayers at the air-water interface. The study on surface pressure-area isotherms

L. Gargallo B. Miranda A. Leiva D. Radić

Abstract

Alternating maleic anhydride-n/t-stearyl methacrylate (MA-n/t-StM) amphiphilic copolymer and poly(stearyl methacrylate) (PStM) were spread as monolayers by evaporation of chloroformie ca. 0.1% (w/v) solutions on the surfaces of water and aqueous solutions. Surface pressure (rc) vs. area (A) (A2 per repeating unit) isotherms (298 K) were measured for MA-nlf-StM and PStM spread on water and on aqueous poly(monomethyl itaconate) (PMMel) solutions at pH 3.0 and 7.0. PMMel modified considerably the shape of the MA-nZf-StM-on-water isotherms. The zero-pressure limiting area per repeating unit (ru), Ao, rose from 38 to 41 A2/ru (Table 2). At pH 3.0, the surface pressure along the MA-aZt-StM isotherm on aqueous PMMel as subphase was higher than that at pH 7.0 under otherwise identical conditions. At pH 3.0, PMMel stabilized the MA-alt-StM monolayers, presumably via H-bonding which is believed to result in an interpolymer complex. The formation of a complex is supported in terms of Brewster angle microscopy images (Figs. 2, 3 in conjunction with Fig. 1), which showed the monolayer (supposed to contain the complex) to be more homogeneous, and by FTIR spectra (Fig. 5) which adduced evidence for the occurrence of specific

Keywords

kopolimery amfifilowe ; monowarstwy ; kompleks międzypolimerowy ; izoterma ; ciśnienie powierzchniowe ; woda i polimerowe roztwory wodne jako subfazy amphiphilic copolymers ; monolayer ; interpolymer complex ; surface pressure-area (per repeating unit) isotherms ; water and aqueous solutions as subphases

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Gargallo, L., Miranda, B., Leiva, A., & Radić, D. (2022). Polydnonomethyl itaconate) as subphase stabilizer of maleic anhydride-alt-stearyl methacrylate monolayers at the air-water interface. The study on surface pressure-area isotherms. Polimery, 46(11-12), 828–834. Retrieved from https://polimery.ichp.vot.pl/index.php/p/article/view/2140

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L. Gargallo polimery@ichp.pl

Affiliation
Depto. Quimica Fisica, Facultad de Quimica Pontificia Universidad Católica de Chile Casilla 306, Santiago 22, Chile

B. Miranda

A. Leiva

D. Radić