Probing the Near-Surface Composition Profile of Pressure Sensitive Adhesive Films with X-Ray Reflectivity

Autor:	Peter Müller-Buschbaum, Alexander Diethert
Rok vydání:	2011
Předmět:	Materials science Component (thermodynamics) Analytical chemistry Context (language use) Surfaces and Interfaces General Chemistry Surfaces Coatings and Films Solvent Atmosphere X-ray reflectivity Mechanics of Materials Materials Chemistry Copolymer Surface roughness Adhesive
Zdroj:	The Journal of Adhesion. 87:1167-1190
ISSN:	1545-5823 0021-8464
DOI:	10.1080/00218464.2011.628869
Popis:	The composition of pressure sensitive adhesive films as a function of distance from the sample surface is probed with x-ray reflectivity. A two-component statistical copolymer with ethylhexylacrylate as the majority component and methylmethacrylate representing the minority component is chosen as a sample system. Different preparation protocols are employed to tailor the near-surface composition profile. In this context, doctor-bladed films exhibit a different near-surface composition as compared with solution cast samples. For the latter case, a small surface roughness can be ensured by either using slowly evaporating solvents or reducing the solvent evaporation speed by providing an appropriate atmosphere surrounding the drying solution. For freshly prepared samples, the use of non-polar solvents in combination with the corresponding solvent vapor atmosphere leads to a surface enrichment of ethylhexylacrylate whereas a humid environment, independent of the choice of solvent, favors enrichment of the mor...
Databáze:	OpenAIRE
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