Kinetics of grafting

Chapiro has recently examined the influence of the irradiation conditions on the kinetics of grafting on polyethylene. The high yield of graft copolymer was interpreted by admitting the formation of cross-peroxide groups between the chains. Using a,a -diphenylpicrvl-... 

The various data obtained for the kinetics of graft copolymerization onto PTFE films demonstrate that this reaction is complicated by the fact that the rate of diffusion of the monomer may become the controlling factor. It seems interesting at this point to compare and discuss together the results obtained with the different monomers. Table I summarizes the data obtained for autoacceleration indexes (/ ), dose-rate exponents (a), and over-all activation energies E, with styrene, acrylic acid, and vinylpyridine. Several conclusions can be derived from an examination of these data. 

Influence of the cellulose structure and of the chemical structure of the grafted polymer on the kinetics of graft copolymerization of cellulose, on the composition, and the structure of the cellulose products. 

Effect of Cellulose Structure and Surface Area on the Kinetics of Grafting... 

GAO AND OU-YANG Kinetics of Grafted Chains in Polymer Brushes... 

Fig. 15 Kinetics of grafting of the benzylamine (200%) onto a poly(VDF-co-HFP) copolymer Kynar containing 10 mole % of HFP. The grafting reaction is carried out in MEK at 80 °C [133]...

Table 18 [52] reports the d.o.g. (%) of different membranes under the same experimental conditions. The difference in d.o.g. between the homopolymer and the dense-membrane copolymer is evident. A 100% grafting yield is detected in the case of the poly(VDF-co-HFP) copolymer, whereas 6% is the d.o.g. obtained in the case of the PVDF membrane. This difference can be due to the different compatibility of the two polymers with styrene, and the kinetics of grafting which is faster in the case of the copolymer. Hence, irra-... 

The kinetics of graft copolymerization substantially correspond to those of styrene homopolymerization except at low rubber concentrations and at high conversions due to cross-linking reactions [34]. Figure 9 illustrates a schematic of a network of polybutadiene and polystyrene [35]. 

Fig. 5 Growth kinetics of grafted polymer for different catalyst concentrations in SI-ATRP of methyl acrylate (MA) from gold substrate, with [MA] = 2 M and [CuBr2/Me6TREN]/[CuCl/ MegTREN] = 0. 3. Lines show the predicted result from the model. Data points were experimentally obtained squares 40 mM, circles 2 mM, triangles 0.1 mM [102, 103]...

Ligoure C, Leibler L (1990) Thermodynamics and kinetics of grafting end-functionalized polymers to an interface. J Phys-Paris 51 1313-1328... 

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