An X-ray photoelectron spectroscopy study of the surface of siloxane-containing block copolymers

Study of the electrochemical oxidation and reduction of C.I. Reactive Orange 4 in sodium sulphate alkaline solutions

“…Contribution at 286.4 eV is due to C-OH bond [70], present in the molecular structure of the hydroxy-naphthalene moiety. Signals at 289.4 and 290.9 eV are attributed to carbonate and polycarbonate groups [71], arisen from contamination. The S 2p analysis of high sensibility spectrum (Fig.…”

Surface behavior of blends of SBR with ultrasonically devulcanized silicone rubber

“…In the research of blends of PDMS with PVC, 10 it was found that at a silicone bulk concentration of about 6 wt%, the corresponding surface concentration is about 80%. In other research on blends of PDMS with PC or PSF, 17,18 electron spectroscopy for chemical analysis (ESCA) measurements indicated that for blends of PDMS and PC, the surface concentration of PDMS reaches about 95 wt% at 1 wt% bulk concentration of PDMS. In the case of blends of PDMS and PSF, the surface concentration of PDMS can also reach about 95 wt% at 1 wt% bulk concentration of PDMS.…”

Surface segregation of polydimethylsiloxane-polyether block copolymers in coatings driven by molecular architecture

“…[1,2] It is well known that polymer surfaces can be functionalized by blending with a low amount of amphiphilic block copolymer, where segregation of the low surface energy block imparts significant changes in surface properties. [3][4][5] High levels of surface enrichment were achieved by block copolymers containing polydimethylsiloxane (PDMS) in a variety of different polymer matrices [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Analogous block copolymers can also be utilized in crosslinked polymer network coating materials in a similar manner [22,23] as their low surface energy and inherent interfacial affinity results in the possibility to modify coating surface properties with only a minimal bulk concentration [24].…”