Abstract:Contribution of the magnetic resonance spectroscopies to the determination not only of the chemical structure but also of the dynamics of the polymer chains is examined. Analysis of such complex systems involves different aspects. Questions as: the nature of the crosslinking via sulfur bridges, presence of additives, influence of the heat treatments, behaviour under strain, analysis of the interphase … are considered. A part is devoted to the dynamic behaviour of the chains in the interphase elastomer/filler.
“…Figure 2 shows schematically the various possibilities of polymer chain attachments to the filler particles. 4 Chain segments E, F, and D are not affected directly by the macroscopic deformation.…”
Section: Introductionmentioning
confidence: 99%
“…As well as the susceptibility of the carbon black filler, we also consider that the applied macroscopic deformation does not affect the chains closely attached to filler particles to the same degree as it does the remaining chains. Figure shows schematically the various possibilities of polymer chain attachments to the filler particles . Chain segments E, F, and D are not affected directly by the macroscopic deformation.…”
Section: Introductionmentioning
confidence: 99%
“… …”
Section: Introductionmentioning
confidence: 99%
“…Model of the filler−elastomer interactions: cb, carbon black; A, physical attachment; B, chemical attachments; C, cross-linked rubber chain; D, loose fold; E, tight fold; F, multiple adsorptive attachments; G, interparticle tie chain; H, cilium; I, entanglements (from ref ).…”
Deuterium NMR line shapes of carbon black (N220) filled cis-1,4-poly(butadiene) networks
have been examined. The effect of the susceptibility of the filler on the NMR line shape has been
considered. The theory proposed by Brereton and Ries for deuterium NMR line splitting in spectra of
polymer networks was used to fit the experimental data. It was found that the polymer segments near
the surface of a filler particle experience a different local magnetic field from the remaining segments,
due to the susceptibility of the carbon black. This effect gives rise to an asymmetry in the NMR spectrum,
which until now has not been explained. Additionally, this analysis determines the fraction of polymer
units affected by the local field of the filler particles and provides information about the effect of the
macroscopic deformation on these attached chains.
“…Figure 2 shows schematically the various possibilities of polymer chain attachments to the filler particles. 4 Chain segments E, F, and D are not affected directly by the macroscopic deformation.…”
Section: Introductionmentioning
confidence: 99%
“…As well as the susceptibility of the carbon black filler, we also consider that the applied macroscopic deformation does not affect the chains closely attached to filler particles to the same degree as it does the remaining chains. Figure shows schematically the various possibilities of polymer chain attachments to the filler particles . Chain segments E, F, and D are not affected directly by the macroscopic deformation.…”
Section: Introductionmentioning
confidence: 99%
“… …”
Section: Introductionmentioning
confidence: 99%
“…Model of the filler−elastomer interactions: cb, carbon black; A, physical attachment; B, chemical attachments; C, cross-linked rubber chain; D, loose fold; E, tight fold; F, multiple adsorptive attachments; G, interparticle tie chain; H, cilium; I, entanglements (from ref ).…”
Deuterium NMR line shapes of carbon black (N220) filled cis-1,4-poly(butadiene) networks
have been examined. The effect of the susceptibility of the filler on the NMR line shape has been
considered. The theory proposed by Brereton and Ries for deuterium NMR line splitting in spectra of
polymer networks was used to fit the experimental data. It was found that the polymer segments near
the surface of a filler particle experience a different local magnetic field from the remaining segments,
due to the susceptibility of the carbon black. This effect gives rise to an asymmetry in the NMR spectrum,
which until now has not been explained. Additionally, this analysis determines the fraction of polymer
units affected by the local field of the filler particles and provides information about the effect of the
macroscopic deformation on these attached chains.
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