In situ ellipsometry studies on swelling of thin polymer films: A review

被引:33
|
作者
Ogieglo, Wojciech [1 ]
Wormeester, Herbert [2 ]
Eichhorn, Klaus-Jochen [3 ]
Wessling, Matthias [4 ]
Benes, Nieck E. [1 ]
机构
[1] Univ Twente, MESA Inst Nanotechnol, Inorgan Membranes, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, MESA Inst Nanotechnol, Phys Interfaces & Nanomat, NL-7500 AE Enschede, Netherlands
[3] Leibniz Inst Polymer Res Dresden, D-01069 Dresden, Germany
[4] DWI Leibniz Inst Interact Mat, D-52074 Aachen, Germany
关键词
In situ ellipsometry; Swelling; Thin polymer films; POLYELECTROLYTE MULTILAYER FILMS; QUARTZ-CRYSTAL MICROBALANCE; SPECTROSCOPIC ELLIPSOMETRY; REFRACTIVE-INDEX; CARBON-DIOXIDE; OPTICAL ANISOTROPY; HYPERBRANCHED POLYESTERS; INSITU ELLIPSOMETRY; POLYSTYRENE FILMS; BINARY-MIXTURES;
D O I
10.1016/j.progpolymsci.2014.09.004
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The properties of a thin polymer film can be significantly affected by the presence of a penetrant. This can have potential implications for many technological applications, such as protective and functional coatings, sensors, microelectronics, surface modification and membrane separations. In situ ellipsometry is a powerful technique for the characterization of a film in contact with a penetrant. The main advantages of ellipsometry include the very high precision and accuracy of this technique, combined with the fact that it is non-intrusive. Recent advances in the speed and automation of the technique have further expanded its application. This article provides an overview of the research that has been done with in situ UV-vis ellipsometry on penetrant-exposed polymeric films, in the last 15-20 years. The focus is predominantly on films that are not attached covalently to a substrate. Polymer brushes and grafts are therefore excluded. This review addresses a variety of topics, covering instrumental aspects of in situ studies, approaches to data analysis and optical models, reported precision and repeatability, the polymer-penetrant systems that have been studied, the kind of information that has been extracted, and other in situ techniques that have been combined with ellipsometry. Various examples are presented to illustrate different practical approaches, the consequences of the optical properties of the ambient, and the various ways that have been employed to bring polymer films in contact with a penetrant, ranging from simple ex situ-like configurations (i.e., drying studies) to complex high pressure cells. The versatility of in situ ellipsometry is demonstrated by examples of the distinctive phenomena studied, such as film dilation, penetrant diffusion mechanisms, film degradation, electrochemical processes, and the broad variety of polymer-penetrant systems studied (glassy and rubbery polymers, multilayer stacks, etc.). An outlook is given on possible future trends. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:42 / 78
页数:37
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