Reactive processing of polymers: mechanisms of grafting reactions of functional antioxidants on polyolefins in the presence of a coagent

Chemical modification of polypropylenes by maleic anhydride: Influence of stereospecificity and process conditions

“…From Figure 2(A) it can be conies a high degree of transference to the solvent and even grafting reactions between solvent and cluded the higher the peroxide level the higher the graft obtained. This is absolutely true for low polar monomer 51 can be formed. This fact seems to be coincident with the previous findings, i.e., levels of MAH in the media but not for values beyond 12% of graftable units, when it seems the after a maximum MAH initial concentration when adding more and more MAH to the media the exgrafts obtained seem to get closer to each other with nondependence of the maleic anhydride level cess would have the tendency to react with the molecules having more mobility as they are those present in the media.…”

“…As it has been mentioned before if we remember the statistical parameters works in literature reporting differences between grafting reactions carried out in different of the fits from the experimental runs, which were compiled in Table III, we appreciate the accuracy isomers of xylene, 24 different behavior of benzene and xylene, 23 and the great capability (excellent in both cases) is better for the data coming from the process in the melt than for the pershown for decaline to get activity and grafts from the reaction media. 51 formed in solution. This aspect can be easily ex- 52,53 and in fact, decrements of 32, 37, and 37% in conversion at 4, 6, and 9 minutes, respectively, are obtained.…”

“…In Figure 2(A) graft values versus initial MAH concentration in the reaction media have been Some studies have clearly concluded the influence the kind of solvent has on the transference possirepresented, and in Figure 2(B) conversion versus MAH concentration for different considered bilities when working with xylene (different isomers), 23,24 benzene, 23 and decalin. 51 In such studconstant concentrations of initiator and for a solution process. From Figure 2(A) it can be conies a high degree of transference to the solvent and even grafting reactions between solvent and cluded the higher the peroxide level the higher the graft obtained.…”

Design of functional macromonomer derivatives of poly(isobutylene‐co‐isoprene)

“…Researchers have derivatized ethylene-rich polymers by radical grafting of maleimide [47] and acrylic monomers [48] bearing stabilizing functionality, with varying degrees of success. [49,50] This approach cannot be applied efficiently to IIR, since the material is not amenable to peroxide-initiated graft modification. [31] This led us to pursue the functional itaconate approach.…”

Low-Density Polyethylene/Polyamide/Clay Blend Nanocomposites: Effect of Morphology of Clay on Their Photooxidation Resistance

“…Different strategies have been proposed in the scientific literature for enhancing the performance of the polymeric materials, including the formulation of polymer blends, the introduction of nanofillers, and the functionalization of polymers [2][3][4]. Blending polymers can be considered as a suitable economical way for the formulation of high-performance polymeric-based materials, since the proper choice of the blend constituents allows obtaining multicomponent systems whose properties go well beyond the limits predicted by the simple additivity rules based on the single component properties [5].…”