Methacryloyl radical

Varying amounts of two competing terminators, the simple methyl ester 106 and the template model ester 107, were introduced into the standard MMA oligomerization experiment with template 63 (Scheme 8-28) [18], Both of these exogenous terminators were of comparable intrinsic reactivity in combination with a simple methacryloyl radical, as seen by the model reaction 101 + (102 + 103) 104 + 105 shown in Scheme... 

Biodegradable amphiphilic networks have been synthesized by free radical copolymerization of PCL or PD,L-LA dimacromonomers with a hydrophilic comonomer, i.e., 2-hydroxyethylmethacrylate (HEMA) [45, 46, 114]. Well-defined a,cD-methacryloyl PCL and PD,L-LA oligomers were synthesized by the living ROP of the parent monomers initiated by diethyl alimiinum 2-hydroxyethyl-... 

A PP macromonomer with a methacryloyl end group was synthesized, and was used to prepare PMMA-g-PP graft copolymers by conventional free radical copolymerization [104]. Vinylidene-terminated PP (Mn = 1000) was converted into terminally hydroxylated PP (PP-OH) by a combination of the hydroboration reaction of the unsaturated group and oxidation reaction. Resulting PP-OH was reacted with methacryloylchloride to synthesize termi-... 

The use of 2-mercaptoethanol, HS—CH2—CH2- OH, as a transfer agent belongs to the early attempts to synthesize macromonomers by means of free-radical polymerization l0). Methyl methacrylate was employed as the monomer. The formed polymers bear a terminal hydroxy group which was subsequently reacted with methacryloyl chloride. 

Poly-9-(f -methacryloyloxyethyl)adenine (polyMAOA, 25 a), poly-l-(fi-methacryloyl-oxyethyl)uracil (polyMAOU, 27 a), -thymine (poly-MAOT, 29 a), poly-9-(f -acryloyl-oxyethyl)adenine (polyAOA, 25b), poly-1 -(fi-acryloyloxyethyl)uracil (polyAOU, 27b) and -thymine (polyAOT, 29 b) were prepared by free-radical polymerization of their corresponding monomers26,27). PolyMAOA and polyAOA are soluble in DMSO, ethylene glycol and acidic aqueous solution (below pH 3), while the polymers having uracil and thymine moieties are soluble in DMSO, DMF and alkaline aqueous solution (above pH 10). 

Muller et al. used the MM technique to synthesize graft copolymers [318]. They copolymerized nBA with an co-methacryloyl-pMMA MM both via a conventional radical process and an ATRP reaction. Although the MM was con-... 

Functional initiators have also been used for the synthesis of macromonomers by free radical processes. 2-2/-Azobis(N-N/-dimethylene isobutyramidine) was used to prepare imidazol terminated PS followed by an end-capping reaction with chloromethylstyrene [ 158]. A similar initiator was used for the radical polymerization of vinyl acetate (VAc) followed by reaction with chloromethylstyrene or methacryloyl chloride [159] (Scheme 47). 

In the case of synthetic elastomers formed by free radical emulsion techniques, monomers that contain both an antioxidant moiety and a polymerizable function can be copolymerized (6). A series of esters and amides containing the 4-anilinophenyl group or the 3,5-di- er -butyl-4-hydroxyphenol group and a polymerizable a, /3-unsaturated acyl group such as acryloyl or methacryloyl were incorporated into the polymer. 

Regarding the production of polymers (Kobayashi and Higashimura 2003) oxidases have been used to catalyze the chemoselective polymerization of phenolic monomers having a reactive functional group like methacryloyl and also the induced polymerization of syringic acid that cannot be polymerized by conventional metal catalysis. Other example is the use of tyrosinase to produce the coupling of phenoxy radicals from 2- and/or 6-unsubstituted phenols. For example, crystalline... 

When the ester 247 was treated with lauroyl peroxide in the presence of 15 equivalents of styrene, the polymer 248 was obtained. This was soluble in many common organic solvents but which could be precipitated with methanol, making the technique potentially useful for parallel synthesis. 5 -0-Methacryloyl-uridine and -adenosine have been polymerized onto a silica support, using Cu(I) mediated radical polymerization, under conditions favouring products of narrow polydispersity. ... 

P2VP) molecular brushes via the free radical polymerization of methacryloyl-terminated P2VP macromonomers [14]. (Reprinted with permission of Wiley-VCH.)... 

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