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Poly film graft density

Yang SH, Choi IS (2010) Thickness control of biomimetic silica thin films grafting density of poly (2-(dimethylamino)ethyl methacrylate) templates. Anglais 31 753... [Pg.447]

An alternative photo-SIP approach was described by Kang and coworkers, where they used an argon plasma to oxidize alkylthiolate SAMs on planar gold [55]. The plasma treatment oxidized carboxy-terminated SAMs to peroxide moieties. UV irradiation in the presence of acryhc acid and allylpentafluorobenzene yielded ultra-thin graft layers of 6-7nm. The poly(acrylic acid) layers were found to adsorb Fe " ions from solution. This particular photoinitiation method yields low-density polymer brush films. [Pg.61]

Lamination by photografting has been employed in obtaining barrier materials. For instance, acrylic acid graft polymerized between two low-density polyethylene (LDPE) films decreases the penetration of oxygen dramatically. Poly(vinyl alcohol) (PVA) interior films photolaminated by acrylic acid polymerization to LDPE films serve as a barrier material for oxygen and water. Such laminates have potential use in packaging industry [137]. [Pg.530]

While the advantages and applications of immobilizing hydrophilic polymers on surfaces are well documented, full characterization of surface-localized polymers in terms of density and film thickness is rare. Studies have shown that adsorbed neutral, hydrophilic polymers attenuate electrokinetic effects, presumably due to displacement of the hydrodynamic plane of shear. In the examples shown in Figure 19.9, poly(ethylene glycol)s (PEGs) were grafted on to quartz capillary... [Pg.381]

Applications of scanning electron microscopy (SEM) to polymer characterisation and microstructure include studies on the zwitterions-type polymer, poly(3-diethyl methylmethacryloyl ethyl) ammonium persulfonate grafted on to a silica surface by treatment of poly(2-dimethyl amino) ethyl methacrylate [2], polyaniline coated glass fibre fillers with different polyaniline contents [3], and also studies on ultra high molecular weight blends [4] and high-density polyethylene (HDPE)-gamma ferric oxide composite films [5]. [Pg.427]

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See also in sourсe #XX -- [ Pg.96 ]



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