Grafted Block Copolymers

PDMS macromonomer was used as a component of block segment to obtain a graft block copolymer with PMMA (Scheme 1) [51-53]. This graft block copolymer is characteristic of surface water repellence, easy peeling, and weatherability superior to simple graft copolymers of the same members. PDMS-b-PVC film also shows long life surface water repellency with weatherability and very low coefficiency of abrasion [18,54]. 

Scheme 1 Schematic structure of graft block copolymer [51] TTTm = polymethyl methacrylate segment w AA = po-lydimethylsiloxane segment.

Xu C, Wu T, Batteas JD, Drain CM, Beers KL, Easolka MJ (2006) Surface-grafted block copolymer gradients effect of block length on solvent response. Appl Surf Sci 252 2529-2534... 

Grafted block copolymers of activated cellulose (cell ) are formed by immersing the activated cellulose in a solution of two or more monomers (M and m). Typical reactions include ... 

Grafted block copolymer blends Divers The soluble polymer usually was the matrix with the other resins forming isolated domains. Physical properties and morphology IMerret, 1957 Beecher et aL, 1969 Inoue et al., 1960 Pedemonte et aL, 1975 Kraus and RoUman, 1976 Kawai et al., 1971]... 

The possibility of grafting block copolymer chains via a two-step SI-ATRP was studied. The concomitant increase in molar mass and thickness of the hydrophilic layer proved both the living character of the polymer grafted in the first step and the efficient reinitiation in the second step [152]. An example of block copolymer used was polyDMAAm-h-polyNIPAAm, which exhibited a change in the chain conformation leading to a reduction of the hydrodynamic diameter of the particles upon an increase in temperature above the LCST, in a similar way as the polyNIPAAm homopolymer. 

FIGURE 2.1 Various possible architectures for amphiphilic copolymer (a) linear block copolymers with different numbers of A and B blocks, (b) cyclic block copolymers, (c) star block copolymers, (d) graft block copolymers, (e) block copolymers with dendritic or hyper-branched blocks, and (f) semitelechelic polymer (upper), telechelic polymer (middle), and asymmetrical telechelic polymer with different hydrophobic chain ends [9]. 

V. Gernigon, P. Leveque, C. Brochon, J.-N. Audinot, N. Leclerc, R. Bechara, F. Richard, T. Heiser, G. Hadziioannou, FuUerene-Grafted Block Copolymers Used as Compatibilizer in P3HT/PCBM Bulk Heterojunctions Morphology and Photovoltaic Performances. Eur. Phys. J. Appl. Phys. 2011,56,34107. 

V. Gernigon, et al., Fullerene-grafted block copolymers used as compati-bilizer in P3HT/PCBM bulk heterojunctions Morphology and photovoltaic performances. The European Physical Journal - Applied Physics, 2011. 56(03). 

Pochan, D. J., S. P. Gido, S. Pispas, and J. W. Mays. 1996. Morphological transitions in an 12S simple graft block copolymer From folded sheets to folded lace to randomly oriented worms at equiUbrium. Macromolecules 29(15) 5099-5105. 

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