Morphology and chemical structure of poly(methyl methacrylate) surfaces and interfaces: restructuring behavior induced by the deposition of SiO2

Solvent effect on the film formation and the stability of the surface properties of poly(methyl methacrylate) end-capped with fluorinated units

“…The other bands at 2830 and 2910 cm −1 are assigned to the harmonic or combination vibrations of the bending of -OCH 3 groups, respectively, which are enhanced by Fermi resonances [48]. However, the ssp SFG spectra of PMMA 857 -ec-FMA 3.3 films cast with different solutions in this study were quite different from those of the homo PMMA.…”

“…Fig. 6 shows SFG spectra in the 2800-3000 cm −1 region, which corresponds to the C-H stretching vibrations, with an ssp polarization combination of pure PMMA and PMMA 857 -ec- The strong band at 2950 cm −1 is assigned to the symmetric stretching vibration of the ester methyl groups [16,36,48].…”

Surface segregation of fluorinated moieties on poly(methyl methacrylate-ran-2-perfluorooctylethyl methacrylate) films during film formation: Entropic or enthalpic influences

“…The band at 2950 cm À1 is assigned to the symmetric stretching of the ester methyl groups. The band at 2830 cm À1 can be assigned to a combination vibration related to the ester methyl groups [48,49]. The band at 2910 cm À1 is assigned to the Fermi resonance modes of the methylene groups [46,49].…”

Composition and solution properties of fluorinated block copolymers and their surface structures in the solid state

“…Two peaks for pure cyclehexanone were observed at 2855 and 2945 cm −1 , assigned as the symmetric stretch and Fermi resonance of -CH 2 -groups [26] . A new band at 2910 cm −1 was found for the PMMA solution, which is assigned to vibrations of -OCH 3 groups [20,26] . There was no peak observed at 2910 cm −1 for PMMA 144 -b-PFMA 0.7 ; however, a new peak appeared at 2930 cm −1 , attributed to the asymmetric stretching vibration of the methylene groups [CH 2 (s)] connected to the perfluoroalkyl group [C 8 F 17 ] [26] .…”

“…At the same time, the peaks at 2850 and 2910 cm −1 were observed when the length of PFMA block was about 10. The bands at 2830 and 2910 cm −1 are assigned to the harmonic or combination vibrations of the bending of -OCH 3 groups, respectively, which are enhanced by Fermi resonance [20] . The peaks at 2875 and 2850 cm −1 were assigned to the symmetric stretching vibration of the methylene groups [CH 2 (s)] connected to the perfluoroalkyl group [C 8 F 17 ] and that of the backbone methylene, respectively [8] .…”