Measurement of Concentration Profiles in Thin Film Binary Polymer-Solvent Coatings Using Confocal Raman Spectroscopy: Free Volume Model Validation

作者：Arya Raj Kumar^*

来源：Drying Technology, 2014, 32(8): 992-1002.

DOI：10.1080/07373937.2014.880714

• Binary coating
• Confocal Raman spectroscopy
• Free volume theory
• Thin films

Concentrations of solvent and polymer have been measured using confocal Raman spectroscopy in poly(styrene)-tetrahydrofuran, poly(methyl methacrylate)-tetrahydrofuran, and poly(styrene)-p-xylene systems. Free volume theory parameters have been regressed from the measured concentration data. Model-predicted concentration profiles are in very good agreement with the measured profiles in the case of a highly volatile solvent. For instance, free-volume-model-predicted profiles are in very good agreement in poly (styrene)-tetrahydrofuran system and poly(methyl methacrylate) -tetrahydrofuran system. However, the free volume model is not able to predict entire measured profiles in the case of less-volatile solvent in poly(styrene)-p-xylene system.

• 出版日期2014