Influence of chain sequence structure of polymers on ToF-SIMS spectra

An XPS and ToF-SIMS investigation of the outermost nanometres of a poly(vinylidene difluoride) coating

“…In Figure 3 positive ion depth profiles of the molecular fragments C 3 HF 4 + , C 5 H 2 F 5 + , and CF 3 + , diagnostic of the PVdF component of the S4 coating [28,29], are presented. It is observed in Figure 3 that the depth profiles for the C 3 HF 4 + , C 5 H 2 F 5 + , and CF 3 + molecular ions originating from the PVdF are identical in shape to the F depth profile in Figure 2a (although of varying intensity).…”

ToF‐SIMS multivariate characterization of surface modification of polymers by N2H2 atmospheric pressure dielectric barrier discharge

“…[37] There is also the presence of different C x H y and C x H y F z fragments in PC1 and PC2, related to surface etching and hydrogenation by the plasma in presence of H 2 ; the CF and the other C x H y F z fragments drop drastically while the C x H y fragments increase when there is H 2 in the discharge. Again, there is an anticorrelation between certain N-containing masses fragments in the positive and negative loadings.…”

“…For PC1, the positive loadings are dominated by C x F y masses (x and y ≥ 2) specific to PTFE, [16,38] whereas the negative loadings are dominated by C x H y , C x H y F z , specific to PE and PVDF [36,37] and the surface modification with the N-and O-containing fragments. For PC2, the positive loadings are dominated by CF and a few C x H y F z masses specific to PVDF whereas the negative loadings are dominated not only by the surface modification with N-containing fragments but also by the hydrogenation of the polymers by the presence of C x H y fragments.…”

Melt rheological properties of ETFE: an attempt to illuminate the fluorine-substitution effect

“…Consequently, ETFEs are intensively explored on the molecular parameters and microstructures [3][4][5][6][7][8][9], thermal and crystallization behaviors [10][11][12][13], and steady-state viscous properties [14][15][16]. However, its capillary flow and high-shear rheological behaviors are scarcely reported, despite their fundamental and technical importance.…”