Segmental orientation in filled networks

Baumann, K.; Gronski, W.

doi:10.1007/bfb0115486

Cited by 5 publications

(7 citation statements)

References 15 publications

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“…No model in the literature for the NMR line shape from strained networks predicts this asymmetry. A similar situation was already stated by Gronski et al 1 They observed that increasing the filler content of cis-1,4-poly(butadiene) network at constant deformation results in an overall broadening of the doublet line shape at nearly constant splitting and an increase in the asymmetry of the outer signal wings. To explain the above observations, they considered the filled network as consisting of two parts.…”

Section: Introductionsupporting

confidence: 85%

“…The aim of this paper is to explain the asymmetric NMR spectra observed from deformed carbon black filled poly(butadiene) networks. 1 To illustrate this asymmetry, we show in Figure 1 a comparison between a NMR spectrum from a filled and unfilled strained network. We consider the effect of the susceptibility of the carbon black filler on the local field of polymer chains that are in the vicinity of these particles.…”

Section: Introductionmentioning

confidence: 99%

“…13 However, the 2 H NMR line shape observed from carbon black filled elastomers is somewhat different from that of unfilled elastomers. 1 In the case of carbon black filled cis-1,4-poly(butadiene) networks it has been observed that the peaks of the spectrum of the Fourier transformed NMR signal are not equal in height; recall Figure 1a. No model in the literature for the NMR line shape from strained networks predicts this asymmetry.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this paper is to explain the asymmetric NMR spectra observed from deformed carbon black filled poly(butadiene) networks . To illustrate this asymmetry, we show in Figure a comparison between a NMR spectrum from a filled and unfilled strained network.…”

Section: Introductionmentioning

confidence: 99%

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Susceptibility Effect of Carbon Black Filler on the Deuterium NMR Line Shape from Poly(butadiene) Networks

Ekanayake¹,

Menge²,

Schneider³

et al. 2000

Macromolecules

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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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Section: Introductionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Susceptibility Effect of Carbon Black Filler on the Deuterium NMR Line Shape from Poly(butadiene) Networks

Ekanayake¹,

Menge²,

Schneider³

et al. 2000

Macromolecules

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“…Considering deuteron splitting and line-shape measurements on carbon-black-filled poly(butadiene), results from our group do indicate a filler effect on molecular order (H. Luo et al, unpubl. ), while in previous work, Gronski and coworkers [38] did not observe an appreciable effect in the same type of systems. It remains to be investigated in how far such serious discrepancies may be explainable, e.g., in terms of different sample preparations or varying degrees of cross-linking.…”

Section: Dq Buildup (Network Chains)mentioning

confidence: 69%

Chain order in filled SBR elastomers: a proton multiple-quantum NMR study

et al. 2004

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A series of cross-linked styrene-butadiene rubbers (SBR) filled with different amounts of carbon black and silica are investigated by proton multiple-quantum nuclear magnetic resonance (NMR). The method yields reliable information on residual dipolar couplings and their distribution, which in turn are related to local chain order and the effective cross-link density in these systems. Fundamental differences between the response of a linear precursor, which undergoes reptational motion, and vulcanized SBR are discussed. For the latter, it is found that the average chain order parameter as well as its distribution does not change significantly with the amount and the type of filler. This is in surprising contrast to recent results from Hahn-echo relaxometry applied to the same samples, which indicated a significant filler effect on the cross-link density.

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Application of magnetic resonance spectroscopies to the characterisation of elastomer/filler systems

Legrand

1996

Macromolecular Symposia

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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.

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Segmental orientation in filled networks

Cited by 5 publications

References 15 publications

Susceptibility Effect of Carbon Black Filler on the Deuterium NMR Line Shape from Poly(butadiene) Networks

Susceptibility Effect of Carbon Black Filler on the Deuterium NMR Line Shape from Poly(butadiene) Networks

Chain order in filled SBR elastomers: a proton multiple-quantum NMR study

Application of magnetic resonance spectroscopies to the characterisation of elastomer/filler systems

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