Adsorption of poly(methyl methacrylate) and poly(vinyl chloride) blends onto polypyrrole. Study by X-ray photoelectron spectroscopy, time-of-flight static secondary ion mass spectroscopy, and inverse gas chromatography.
Poly(vinyl chloride) (PVC) and poly(methyl methacrylate) (PMMA) were co-adsorbed onto conducting, nitrate-doped, polypyrrole (PPyNO3) from tetrahydrofuran and 1,4-dioxane. The surface composition of PPyNO3 before and following polymer adsorption was monitored by X-ray photoelectron spectroscopy and time-of-flight static secondary ion mass spectroscopy which indicated that PMMA and PVC co-adsorb. However, PVC adsorption is substantially higher from 1,4-dioxane, hence a solvent effect. Inverse gas chromatography permitted to determine the dispersive contribution to the surface energy (gamma(s)d) and acid-base descriptors of the untreated and polymer blend-coated polypyrrole specimens. Whilst gamma(s)d values clearly indicate that the polymer coatings are patchy, acid-base descriptors suggest that the blend patches have a PMMA-rich surface, especially in the case of adsorption from 1,4-dioxane.
Abel
Marie-Laure
ML
Interfaces, Traitements, Organisation et Dynamique des Systèmes, Université Paris 7-Denis Diderot, associé au CNRS (UMR 7086), France.
Chehimi
Mohamed M
MM
Fricker
Florence
F
Delamar
Michel
M
Brown
Andrew M
AM
Watts
John F
JF
D000327:Adsorption; D002849:Chromatography, Gas / Q000379:methods*; D004577:Electron Probe Microanalysis / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D011143:Polyvinyl Chloride / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*
D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D011143:Polyvinyl Chloride; D019904:Polymethyl Methacrylate