Surface-pressure gradients in monolayers of poly(methyl methacrylate)

Peng J.B. and Barnes G.T. (1991) Surface-pressure gradients in monolayers of poly(methyl methacrylate). Langmuir, 7 8: 1749-1754.

Author Peng J.B.
Barnes G.T.
Title Surface-pressure gradients in monolayers of poly(methyl methacrylate)
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 1991-01-01
Sub-type Article (original research)
Volume 7
Issue 8
Start page 1749
End page 1754
Total pages 6
Subject 1505 Marketing
1606 Political Science
Abstract Compression of poly(methyl methacrylate) (PMMA) monolayers generates gradients in surface pressure similar to but smaller than those previously reported for monolayers of poly(vinyl stearate) (PVS). The gradient increases sharply with compression of the condensed film and is dependent on the molar mass of the polymer: the higher the molar mass, the steeper the gradient formed. Both the spreading and compression techniques affect, to some extent, the formation of the gradient, but a serious gradient implying inhomogeneity in the monolayer is always produced during compression. When the compression is stopped, the gradient may decay to a limited extent in the first 10 min, but it then remains relatively constant. The collapse pressure of PMMA monolayers suggested by these experiments is 17-20 mN m-1. None of the isotherm measurements for PMMA or PVS monolayers can satisfy the requirements of Huggins' theory on polymer monolayers. Some discrepancies in the published isotherms of PMMA monolayers can now be attributed to the inhomogeneity of the film.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
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Created: Tue, 26 Jul 2016, 14:01:56 EST by System User