NMR Study of Vulcanized Rubber

Fujiwara, Shizuro; Fujimoto, Kunihiko

doi:10.1080/00222337008061006

Cited by 5 publications

References 2 publications

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The glass transition temperature of a filled binder by nuclear magnetic resonance and thermal mechanical analysis

Price¹,

French²,

Tompa³

1972

J of Applied Polymer Sci

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synopsisThe glass transition temperatures of a binder and filled binder were determined by wide line proton nuclear magnetic resonance and by thermal mechanical analysis. The NiMlt study indicated only one transition temperature for the binder and three transition temperatures for the filled binder. T N A data gave two transition temperatures each for the binder and for the filled binder. These transition temperatures in the filled binder were interpreted as representing two phases: one for the filler-oriented binder and one for the bulk phase. A comparison of the transition temperatures of the binder and filled binder indicates that the transition teniperature of the former is raised by the presence of the filler. It was also found that the presence of water lowered the transition temperature 01 the filled binder used in this work.

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The glass transition temperature of a filled binder by nuclear magnetic resonance and thermal mechanical analysis

Price¹,

French²,

Tompa³

1972

J of Applied Polymer Sci

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Effects of types of fillers on the molecular relaxation characteristics, dynamic mechanical, and physical properties of rubber vulcanizates

Dutta

Tripathy

1992

J of Applied Polymer Sci

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SYNOPSISThe dynamic mechanical, and physical properties of bromobutyl rubber were investigated to determine the effect of particle size and of the structure of carbon black and silica. Filler loading was so adjusted that all the experimental compositions had the same hardness level. The results indicate that the type and loading of filler have no significant effect on the molecular relaxation transition. However, elastomer having a desirable storage modulus with low sensitivity to temperature change can be developed using filler with smaller particle size. Higher elongation at break, and better tensile strength, energy density at break, and fatigue life could be obtained by using finer particle or high structure black than with the low structure and higher particle size black. Finer particle size filler loaded systems exhibit pronounced strain dependence, higher thixotropic change, and delayed recovery in dynamic mechanical properties compared to that exhibited by large particle size filler.

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Colloidal Reinforcement: The Influence of Bound Polymer

Kendall¹,

Sherliker²

1980

Brit. Poly. J.

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The reinforcement of rubbers by colloidal filler particles has often been associated with the presence of ‘bound polymer’, that polymer which cannot be removed by solvent extraction from the filled material. This paper demonstrates to the contrary that, for filled polyethylene, bound polymer is observed but reinforcement is not. Indeed, the bound polymer appears to embrittle the filled material. A new model of the filler‐polymer interface is proposed to account for these results. It is suggested that there are two interfaces in a filled polymer; one between filler and bound polymer, and a second interface between bound polymer and soluble polymer. This second interface appears to be weak in the case of filled polyethylene and causes failure some 2.8 nm from the true filler surface. The model explains why cross‐linking the polyethylene, or increasing its molecular weight, overcomes the embrittlement problem.

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NMR Study of Vulcanized Rubber

Cited by 5 publications

References 2 publications

The glass transition temperature of a filled binder by nuclear magnetic resonance and thermal mechanical analysis

The glass transition temperature of a filled binder by nuclear magnetic resonance and thermal mechanical analysis

Effects of types of fillers on the molecular relaxation characteristics, dynamic mechanical, and physical properties of rubber vulcanizates

Colloidal Reinforcement: The Influence of Bound Polymer

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