Polypropylene (PP) has poor adhesion to metals and other surfaces for its chemical structure. Hence, chemical modification of PP is necessary for metal surface coating application. In this research, grafting of maleic anhydride (MA) onto co(propylene-b-ethylene) in the presence of a dicumyl peroxide (DCP) was accomplished in a single screw extruder. Characteristics of the modified polymer were ...

In recent years, plasma treatments have given good results since they offer high technological efficiency with low waste generation. One of the most important characteristics of plasma methods is their action only on a thin surface layer, whereas the bulk of sample remains unchanged and the modified material keeps its chemical and mechanical properties. In this research, polyurethane membrane s...

This investigation indicates the ability to selectively graft glycidyl methacrylate (GMA) only from the external surface of regenerated cellulose (RC) ultrafiltration (UF) membranes using activator generated electron transfer (AGET) atom transfer radical polymerization (ATRP). This controlled polymerization resulted in epoxy functionalized polymer brush ends. Further reaction of the terminal ep...

Polypropylene (PP) has poor adhesion to metals and other surfaces for its chemical structure. Hence, chemical modification of PP is necessary for metal surface coating application. In this research, grafting of maleic anhydride (MA) onto co(propylene-b-ethylene) in the presence of a dicumyl peroxide (DCP) was accomplished in a single screw extruder. Characteristics of the modified polymer were ...

objective: to compare outcome of patients with burns covering less than 15% of total body surface area(tbsa) undergoing early excision and grafting or delayed skin grafting. method : this was a non-randomized clinical trial including 54 patients with less than 15% tbsa burn referring to ghotboddin hospital of shiraz. they were assigned to two study groups, each group including 27 patients: the ...

In this work, the grafting of maleic anhydride onto two types of linear low density polyethylene with hexene-1 comonomer (LLDPE-H1) and butene-1 comonomer (LLDPE-B1), in the presence of styrene monomer (St) and dicumyl peroxide initiator (DCP) has been studied. The combined influences of MAH, St and DCP on the grafting efficiency via a melt reactive mixing process have been investigated using r...

Polymer chains are irreversibly grafted to a surface in a good solvent and the solvent quality is then reduced dramatically. The chains then collapse. If the grafting density is very high then the collapsed layer should be fairly uniform. However, at lower grafting densities the chains are predicted to form surface "micelles". These micelles minimize the exposed surface area of the collapsed gl...

  Context: In recent years, nanotechnology has opened up several new avenues of extraordinary biomedical potential by modulating metals into their nanosize leading to significant improvement in their chemical, physical and optical properties. Introduction: <span style="color...

abstract among the propagation methods of mango, grafting is the most common method, but growers do not have enough knowledge about the suitable time and grafting methods of this fruit tree. this problem is the most important factor in production of grafted mango plants. this experiment was conducted in a randomized complete block design with factorial arrangement and 10 replications. factors i...

This study investigated the chemical grafting of a single-layer poly(vinyl alcohol) (PVOH) film. The effect of the grafting parameters (grafting time, grafting temperature, and concentration of fatty acid chloride) on the hydrophobicity of the film surface and the film solubility were evaluated. The PVOH substrate film (cold-water soluble at 20°C) was manufactured by flat extrusion and had a th...