Studies on Carbon Black Distribution in Elastomer Blends

Naito, Kazuo; Tajima, Hideo; Wada, Norio; Inoue, Sakae

doi:10.2324/gomu.49.6_476

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…In this section, we compared the CB distribution ratio obtained by our method (Table 4) and that by the CB-gel method. The CB distribution ratios calculated from the polymer gel ratio on the surface of the CB particles, obtained by PGC, 8 are shown in the second column of Table 5. It was found that the weight percent of CB in the BR is higher than that in the IR.…”

Section: Resultsmentioning

confidence: 99%

“…The CB-gel method is also used to determine the distribution ratio of CB in unvulcanized blend rubbers. 8 A limitation of this method is that it cannot be used for vulcanized rubbers. Also, in this method, only polymers on the surface of the CB particles are measured.…”

Section: Introductionmentioning

confidence: 99%

“…The sample preprocessing is often laborious and difficult in TEM. The CB-gel method is also used to determine the distribution ratio of CB in unvulcanized blend rubbers . A limitation of this method is that it cannot be used for vulcanized rubbers.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Carbon Filler Distribution Ratio in Polyisoprene/Polybutadiene Rubber Blends by High-Resolution Solid-State ¹³C NMR

et al. 2007

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The distribution ratio of carbon black (CB) in a blend of polyisoprene rubber (IR) and polybutadiene rubber (BR) is characterized using high-resolution solid-state 13C NMR. The relationships between the line width of the polymer's resonance lines and CB contents are estimated for both the IR/CB and BR/CB composites from the dipolar decoupling/magic angle spinning (DD/MAS) 13C NMR spectra. For the IR/CB composite, the IR line width increases with the increasing CB content. A similar relationship is obtained between the BR line width and CB contents for the BR/CB composite. These relationships are used as calibration curves. On the basis of these calibration curves, the distribution ratio of CB in the IR/BR rubber blend is determined. It is found for the IR/BR/CB composite that the amount of CB in the BR phase is approximately twice as high as that of CB in the IR phase, irrespective of the CB content. The sum of the amounts of CB in both the IR and BR phases, determined from the above 13C NMR experiments, mostly agree with the amount of CB originally added to the compound. This verifies the validity of the CB distribution determination method by 13C NMR, as proposed in this study. A comparison with a CB-gel method, which can only be used for unvulcanized rubber blends, further confirms the results obtained from the 13C NMR.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%