PEGMA

Kalra et al. studied the synthesis of PPDL graft copolymers following route A as shown in Scheme 6. The macromonomers were obtained by the enzymatic ROP of PDL from HEMA and PEGMA [49]. In a comparative study, Novozym 435 was found to be the most active biocatalyst for this reaction step. Subsequently, graft copolymers were obtained by free-radical polymerization of the macromonomers. A similar approach was published by Srivastava for the HEMA-initiated enzymatic ROP of CL and subsequent free-radical polymerization [50]. 

Rock type Melilitite lava Pegma-toid vein Calcite- bearing pyroclast Lava Calcite-rich pyroclast Calcite- rich pyroclast Pyroclastic bomb... 

Pich and coworkers synthesized microgels by free-radical co-polymerization of vinyl caprolactam and acetoacetoxyethyl methacrylate (AAEM) in the presence of methoxy-capped PEGMA macromonomers [88], It has been reported that variation of the amount of PEG macromonomer or the length of the PEG chain provides effective control of the microgel diameter in the range 60-220nm (Fig. 6). 

The chain ends of the star polymers can be functionalized. So it is possible to link these sites and form networks or gels of stars. Depending on the chemical nature of the chain end, the crosslinking can be permanent or stimuli-switchable. Patrick-ios et al. [105] have prepared crosslinked double hydrophilic star copolymers made from methacrylic acid (MAA) and poly(ethyleneglycol methacrylate) (PEGMA). Meyer et al. [106] synthesized photocrosslinkable PMAA stars, which could serve as well-defined model polyelectrolyte networks. The polyelectrolyte stars can also be used as template for some nanomaterials. Want et al. [107] prepared strong anionic polyelectrolyte stars by sulfonation of the PS stars. They were used as the template for the preparation of conducting polyaniline. 

Monomers 4VP, 4-vinylpyridine NIPAAm, jV-isopropylacrylamidc AA, acrylic acid PEGMA, poly (ethylene glycol) methacrylate SPE, MAI-dimethyl-AW2-methacryloyloxycthyl-/V-0-sulfopropyl)amm<>-nium betaine AMPS, 2-acrylamido-2-methyl-l-propanesulfonic acid qDMAEMA, quaternary 2-dimethylaminoethyl methacrylate St, styrene HEMA, 2-hydroxyethyl methacrylate HEA, 2-hydro-xyethyl acrylate DMAEMA, 2-dimethylaminoethyl methacrylate MAA, methacrylicacid NaSS sodium p-styrene sulfonate AC, [(2-acryloyloxy)ethyl]trimethyl ammonium chloride GMA, glycidyl methacrylate NVP, jV-vinylpyrrolidone MAn, maleic anhydride BVE n-butyl vinyl ether AAm, acrylamide DEAAm, MA-diethylacrylamidc DMAAm, MA -dimethylacrylamidc MMA, methyl methacrylate. 

Finally, SIP of polyethylene glycol methyl ether methacrylate (PEGMA) was carried out, and PS/Poly(PEGMA) segregated binary brashes were prepared. SIP ATRP of PEGMA was carried out with maximum precaution to avoid oxygen. For this purpose, CuBr (80.3 mg, 0.56 mmol), CuBr2 (50 mg,... 

ATRP initiators Polymerization of PEGMA Poly(PEGMA)... 

Figure 2. Effect of PGMA layer thickness on the grafting of PS-COOH and SIP of PEGMA on the surfaces covered with the grafted PS layer.

The SIP of PEGMA was carried out in an oj gen-free environment, using CuBr/Bipyridine as a catalyst in a water/ethanol mixture with PEGMA, Mw 300... 

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