Oxidation polyethylene film

CHARACTERIZATION AND ALBUMIN ADSORPTION ON SURFACE OXIDIZED POLYETHYLENE FILMS... 

On hydrophilic surfaces and also on oxidized polyethylene films (Fig. 5) the maximum adsorption close to the isoelectric point may be explained by reduction of electrostatical lateral repulsions between adsorbing molecules. Other workers 22,26 gj Qw that ionic strenght increase in the substrate solution weakens the effect of these repulsions so that more molecules can adsorb at low than at high pH. 

Table 10.15 Effect of chemical treatment of photo-oxidized polyethylene films [1846] (a) UV irradiated at 253.7 nm...

Materials that typify thermoresponsive behavior are polyethylene—poly (ethylene glycol) copolymers that are used to functionalize the surfaces of polyethylene films (smart surfaces) (20). When the copolymer is immersed in water, the poly(ethylene glycol) functionaUties at the surfaces have solvation behavior similar to poly(ethylene glycol) itself. The abiUty to design a smart surface in these cases is based on the observed behavior of inverse temperature-dependent solubiUty of poly(alkene oxide)s in water. The behavior is used to produce surface-modified polymers that reversibly change their hydrophilicity and solvation with changes in temperatures. Similar behaviors have been observed as a function of changes in pH (21—24). 

Advanced development of ion-selective films has been attempted by radiation grafting of methacrylic acid on polyethylene films, and combination of this with cellophane are also being tested. Polyamide fleece impregnated with regenerated cellulose, is another option for zinc-silver oxide batteries. 

The products of thermal oxidation of polyethylene films can be characterized by C FTNMR furthermore, using the spin-lattice relaxation technique, quantitative estimates can be made of the oxidized functional groups. Observation of the development progress of the various functional groups leads to the postulation of hydroperoxides as the primary oxidation products, which undergo further transformations to the other derivatives in a complex scheme . 

The initiation of thermo-oxidation of polyethylene films by transition metal catalysts during composting proceeded slowly compared to oxidation at the same temperature in an oven (60-70 °C) [56]. The starch-filled polyethylene bags exposed on the surface of the compost broke down into small pieces while the buried bags remained intact after 49 days of exposure [55,... 

The Role of Carbon Black Morphology In Reducing UV Oxidation of Linear Low Density Polyethylene Films, Cabot Technical Report S-115,1997. 

Modifications of polymer surfaces by exposure to electrical plasmas and discharges have also been subjected to XPS examination in several recent articles (4, , 7). An example is the plasma oxidation of polyethylene, polypropylene and polystyrene in a radiofrequency inductively coupled system ( ). Figure 14 shows the Cls and 01s spectra of a polyethylene film after... 

Polyethylene film samples containing pro-oxidant metal additives, LDPE-DCP540, FCB-ZSK15, and FCB-ZSKIO were provided by EPI Environmental... 

---