Monomolecular film and absorption behavior of polymers having carboxyl groups

Nakamae, Katsuhiko; Takeya, Tetsuro; Fujimura, Yasuo; SAKAI, Isoji; Matsumoto, Tsunetaka

doi:10.1080/00222348208204932

Cited by 6 publications

(1 citation statement)

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“…The surface potential increases rapidly from zero even in the region where the surface pressure is nearly zero and reaches a plateau before the plateau in the π-A isotherm. The plateau seen here is generally not seen in oligomers 32 . De Gennes showed that in a 2d melt, a single ideal chain could build up the 2d bulk density without interpenetrating into other chains.…”

Section: Methodsmentioning

confidence: 51%

Anomalous spreading behaviour of polyethyleneglycoldistearate monolayers at air/water interface

2001

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Spreading behaviour of the dimeric surfactant polyethyleneglycoldistearate (PEGDS) monolayer at air/water interface has been studied using surface pressure-area (π-A) isotherms as a function of temperature. The isotherms show a plateau suggesting a transition between a liquid expanded (LE) and a condensed state. The condensed state possibly arises due to nucleation and growth of multilayers from the monolayer. Isobaric measurements of both AT and π-T at constant area show transitions at T = 295 K. These plots suggest a melting followed by formation of condensed microcrystallites. Structure optimization carried out using various angles of orientation of the alkyl tails with respect to the backbone in PEGDS reveals tilt transitions of the tails in different states which can be related to the packing behaviour seen in the isotherms. Optical microscopy has been used to confirm the structures in these states.

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Section: Methodsmentioning

confidence: 51%