Graft poly /methyl acrylate

Liu, S., Sen, A. Syntheses of syndiotactic-polystyrene-graft-poly(methyl methacrylate), syndiotactic-polystyrene-graft-poly(methyl acrylate), and syndiotactic-poly-styrene-graft-atactic-polystyrene with defined structures by atom transfer radical polymerization. Macromolecules, 33,5106-5110 (2000). 

By this method graft copolymers of PAN with poly(methyl acrylate) (PM A), poly-(butyl acrylate) (PBA), poly(acrylic acid) (PAA), poly(methyl vinylpyridine) (PMCP), and polystyrene (PSI) have been obtained. 

A similar procedure was described by Eboatu and Ferguson. An object of analysis was the complex obtained by template polymerization of acrylic acid in the presence of poly(vinyl pyrrolidone). The polycomplex was dispersed in dry benzene and treated with diazomethane. The insoluble portion was filtered. The filtrate containing poly(methyl acrylate) was concentrated and finally dried. The insoluble fraction was scrubbed with methanol to extract polyCvinyl pyrrolidone). The residue was further washed with methanol and then dried. These three portions were characterized by IR spectroscopy. It was found that only about 70% separation of the complex is achieved. The occurrence of inseparable portion is attributed to a graft copolymer formation. For the separated... 

There was a strong possibility that initiation occurred via photosensitized formation of hydrogen peroxide on the metal oxide surface followed by desorption and subsequent photolysis of hydrogen peroxide to form free radicals. Radicals formed by this means would lead to abstraction of hydrogen from the fiber surface and subsequent grafting of poly(methyl acrylate) at these sites. 

H5V was used as grafting monomer for atactic polypropylene, ethylene/propylene copolymer, ethylene/vinyl acetate copolymer, poly(methyl acrylate) and poly(methyl methacrylate) (32). In all cases, grafting was achieved in chlorobenzene with ditertiarybutyl peroxide as the initiator. Up to now, we have not succeeded in grafting 2H5P under the same conditions onto these polymers. 

G. Raju, C.T. Ratnam, N.A. Ibrahim, M.Z.A. Rahman, and W.M.Z.W. Yunus, Enhancement of PVC/ENR blend properties by poly(methyl acrylate) grafted oil palm empty fruit bunch fiber. 7 Appl. Poly. Sci. 110, 368-375 (2008). 

Poly(methyl acrylate)-grafted silica (Sil-MA, ) showed unexpectedly unique selectivity in a reversed phase mode. The unusual nature of Sil-MA is emphasized by Fig. 2. Octadecylated silica shows a good linearity in the log -log P plots (Fig. 2a), indicating that the elution order is understandable by molecular hydrophobicity of solutes. On the other hand, Sil-MA provides no similar result. As shown in Fig. 2b, it seems to show that Sil-MA , instead, recognizes the molecular size (i.e., the number of the... 

Fig. 3 (a) Temperature dependencies of the separation factors of cis- and rran -stilbene with columns Sil-ODA (open circles), Sil-MA (solid circles), and ODS (open triangles). Mobile phase methanohwater (70 30). Sil-MA poly(methyl acrylate)-grafted silica, (b) Schematic illustrations of interaction mechanism between solutes and stationary phases. 

Synthesis of Poly(methyl acrylate) Grafted onto Silica Particles by Z-supported RAFT Polymerization... 

Keywords graft polymerization kinetics poly(methyl acrylate) RAFT polymerization siiica... 

P. J. Costanzo and K. K. Stokes. Synthesis and characterization of poly(methyl acrylate) grafted from poly(thiophene) to form solid-state fluorescent materials. Macromolecules 35(18), 6804-6810 (2002). 

In a later work, copolymers of PVC with various grafted chains like polyCbutyl acrylate), PMMA, PS, and poly(methyl acrylate) were synthesized (43). The backbone was a random copolymer of vinyl chloride and vinyl acetate. The carbonyl substituted alkyl halide groups were used as the initiator for the polymerization of these monomers by ATRP. 

Typical free radical-initiated graft copolymers with thermoplastic grafts are recovered as powders that are insoluble in water and most organic solvents. However, they can be dispersed and/or dissolved in the few solvents that disperse both starch and the synthetic pol3mier, e.g. starch- -poly(methyl acrylate) (S- -PMA) is dispersed by DMSO. 

Fig. 2. Ultimate tensile strength of starch- -poly(methyl acrylate) from Dennenberg et al. as functions of poly-(methyl acrylate) content and molecular weight of the grafted side chains. Homopolymer is retained in the samples.

Fig. 3. Effects of graft content and temperature of pol3nnerization of starch- -poly(methyl acrylate) on its ultimate tensile strength at 5 cm/min strain rate. Dennenberg s data is from samples containing homopol3aner and polymerized over the temperature range 27-40°C other data is for homopolymer-free materials pol3nnerized at the specified temperatures.

Turning to the mechanisms of adhesion, the graft copolymer layer between the polyethylene substrate and hydrolysed poly(methyl acrylate) surface layer... 

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