Journal
EUROPEAN POLYMER JOURNAL
Volume 86, Issue -, Pages 132-142Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2016.11.021
Keywords
Poly(vinylidene fluoride); Solvents; Langmuir and Langmuir Schaefer film
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Ultrathin film of poly(vinylidene fluoride), PVDF is formed by Langmuir technique using different solvents (good and swelling) as spreading agents at the air-water interface. Surface manometry on PVDF film shows that the lift-off area of the polymer depends on the nature of the solvent. Surface potential-area per monomer isotherm of the PVDF film shows a negative (positive) potential for good (swelling) solvents. Brewster angle microscope studies show that the textures of the PVDF film are found to be largely homogeneous for the good solvents in contrast to swelling agents. Further, multilayers of PVDF were transferred onto silicon substrates using Langmuir-Schaefer method and characterized using grazing incidence X-ray diffraction, Fourier transform infrared spectrostopy and field emission scanning electron microscopy techniques. Analysis of the signature peaks from FTIR studies yield evidence for the occurrence of a relatively larger fraction of polar beta phase of PVDF film formed using good solvents. (c) 2016 Elsevier Ltd. All rights reserved.
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