Grafting-from methods density

Turgman-Cohen, S. and J. Genzer, Computer simulation of controlled radical polymerization Effect of chain confinement due to initiator grafting density and solvent quality in "grafting from Method. Macromolecules, 2010. 43(22) p. 9567-9577. 

The grafting from method has an advantage over the grafting to method as a high density polymer brush interface is formed with a multifunctional polymer. 

Grafting-from Method for High-Density Poiymeric Phase... 

As discussed in the section Single-anchor grafting, in high-density ODA prepared by the grafting-from method, a main interaction source for molecular recognition is derived from a carbonyl-77 moiety and not from molecular hydrophobicity. Fig. 7 shows the correlation between log k and log P for Sil-gf-ODA, Sil-ODA , and polymeric ODS... 

We have previously demonstrated that hydrophilic polymer brushes can effectively reduce the interfacial friction in an aqueous environment under low-sliding-speed conditions.In those studies, we employed grafting to approaches to generate polymer brushes on a variety of substrates. By applying the grafting from method described in this work, the formation of high-surface-density polyelectrolyte brushes became feasible. To date, only little experimental work has been dedicated to the macroscopic lubrication properties of polymer brushes prepared with a grafting from method. ... 

This prompted us to investigate in further detail the effect of grafting density on the properties of PNIPAM brushes. We have used the surface forces apparatus to study the thermal response of PNIPAM brushes grown on mica substrates by the so-called grafting-from method (Malham and Bureau 2010). Our main results show that, in the range of temperature explored (20°C-40°C) ... 

In order to circumvent low grafting density of grafting to approach, grafting from method can be applied. A typical synthetic procedure for the synthesis was as follows 5 g of porous silica was first suspended in 50 mL of toluene then 0.91 mL of 3-mercaptopropyltrimethoxysilane (MPS) was added in the suspension. The mixture was... 

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