Grafting-through approach copolymers

The other example of brush copolymers is based on the grafting through approach where macromonomers with vinyl terminal are synthesized rst and polymerization is carried out through the terminal double bonds to produce densely grafted macromolecules. The grafting through approach in combination with ATRP has also been applied in the copolymerization of PMMA macromonomers with n-butyl acrylate (Roos et al., 1999,2000). 

Figure 1 Synthetic strategies forthe preparation of molecular bmshes and their analogs (a) grafting through (b) grafting onto (X and Y are functional groups capable of coupling) (c) grafting from (I is an initiating group) and (d) block copolymer self-assembly approach.

Figure 5.12 Schematical representation of the grafting-through polymerization approach to synthesize molecular brush copolymers depicting that the block brush...

Figure 5.16 A collection of brush block copolymers synthesized utiiizing the grafting-through ROMP approach, which all assemble to photonic crystals. (Adapted from Ref. [47, 48, 50, 55].)...

Polymer grafting is a very useful method to modify the surface properties of polymers. Grafting can be made in bulk (polymer dissolved in a solvent) or in heterogeneous medium (only on the polymer surface). We focused our attention here on the surface grafting. Several approaches have been developed to obtain graft copolymers from polymer substrates, mainly through radical mechanisms. Polymer grafting was achieved by an indirect approach from the active sites aeated by pretreatments or by a direct approach without pretreatment. 

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