Properties of Filled Rubbers

The increased life time expected from reinforcement by particulate fillers naturally refers to cured pieces. The incorporation of reinforcing fillers greatly changes the viscosity of green compounds, conducting to a mainly plastic behavior that allows their processing. [Pg.386]

It is generally reported that elastomers filled with a volume fraction (j) present a viscosity following [129] [Pg.386]

Elastomer interaction with carbon black or silica is very difficult to estimate and correct. On the other hand, it is much easier to take into account the actual volume of aggregate in the mix, and it has been proposed that a corrected volume fraction be used, which integrates the influence of filler structure as represented by DBP [130-132]. [Pg.386]

The value represents the actual size of filler aggregates in the mix it includes, naturally, the filler object itself plus a significant volume of polymer that is shielded from deformation by aggregate tortuousity. This part of the polymer that will not be deformed is usually called occluded rubber [131,133, 134]. [Pg.386]

Nevertheless, occluded rubber must not be confused with the polymer part whose molecular mobility is changed by adsorption. Occluded rubber, which is mainly trapped in aggregate fractal sites, only represents a part of the volume of elastomer whose molecular motion is slowed down. [Pg.386]

The existing concepts of the filler network breakdown and reformation appear to be adequate in describing the deformation-dependence of dynamic mechanical properties of filled rubbers. The different approaches suggest in a common man-... [Pg.40]

The distance between aggregates is a value which correlates with many properties of filled rubber. Figure 7.35 gives an example of the correlation with tanb. " Other applications were made with these properties ball rebound, effect of graphitization on properties of carbon black and parameters of carbon black which characterize structure. [Pg.388]

If structure is rather easy to define on the basis of MET images, it is much more difficult to measure it quantitatively. Nevertheless, the determination of structure is of primary importance because strueture defines the aetual volume of the filler in the mix and therefore the level of strain amplifieation of the deformable phase (see Mechanical Properties of Filled Rubbers ). [Pg.389]

MECHANICAL PROPERTIES OF FILLED RUBBERS 8.5.1 Mechanical Properties in Green State... [Pg.402]

IV. The Mix A Nanocomposite of Elastomer and Filler V. Mechanical Properties of Filled Rubbers... [Pg.367]

The properties of silica-filled rubber and composites depends primarily on the association of individual primary silica particles in the final material. The association of primary particles is believed to be a reversible process responsible for the physical properties of the filled material at low strain levels. This process is furthermore believed to an essential mechanism explaining the improvement of dynamic properties of filled rubber, as opposed to carbon black, silica particles are characterized by a strongly polar surface able to generate a strong interaction. The interaction is reversible and leads to reduced hysteresis. [Pg.706]

Zheleva, D. PhD Thesis Rheological Properties of Filled Rubber Compotmds with Technological Additives , 2003, Urriversity of Chemical Technology and Metallttrgy, Sofia (in Bulgarian)... [Pg.53]

Jeleva, D. Influence of Some Additives on the Rheological Properties of Filled Rubber Compotmds. Proceedings of Conference on Processing and Application of Polymers TECHNOMER, 2001, 139-143, Chemnitz (Germany) (in English)... [Pg.53]

Zheleva D. An Attempt for Correlation between Mooney Viscosity and Rheological Properties of Filled Rubber Compounds. J. Chem. Technol. Metallurgy (UCTM), 2013, vol.48, JV23, 241 -246. [Pg.54]

Physical and mechanical properties of filled rubber composites are strongly influenced by chemical nature, microstructure and molecular weight of the... [Pg.682]

The effect of filler structure on the rubber properties of filled rubber has been explained by the occlusion of rubber by filler aggregates (45). When stmctin-ed carbon blacks are dispersed in rubber, the polymer portion filling the internal void of the carbon black aggregates, or the polymer portion located within the irregular contours of the aggregates, is imable to participate fully in the macrodeformation. The partial immobilization in the form of occluded rubber causes this portion of rubber to behave like the filler rather than like the polymer matrix. As a result of this phenomenon, the effective volume of the filler, with regard to the stress-strain behavior and viscoelastic properties of the filled rubber, is increased considerably. [Pg.990]

The dynamic properties of filled rubbers are widely studied by many researchers in this field of which the contribution made by Payne is the most significant. The dependence of strain amplitude on the storage modulus in filled mbbers is known as the Payne effect [27]. At a strain more than 0.1 %, the storage modulus of filled rubber collapses from a plateau value of G O to a minimum value Goo and this decrease is accompanied by a maximum of the loss modulus, G". The variation in this storage modulus value with respect to the minimum value is called amplitude of the Payne effect, and this increases with the filler content, specific surface and properties of the filler and its dispersion within the matrix. The amplitude inversely changes with temperature. A lot of investigations were performed in order to explain the Payne effect and reasons behind it. Payne neglected the contribution... [Pg.9]

Payne AR, Whittaker RE (1971) Low strain dynamic properties of filled rubbers. Rubber Chem Technol 44 440-478... [Pg.58]

Aranguren MI, Mora E, Macosko CW, Saam J (1994) Rheological and mechanical properties of filled rubber silica-silicone. Rubber Chem Technol 67 820... [Pg.58]

Wang MJ (1999) The role of filler networking in dynamic properties of filled rubber. Rubber Chem Technol 72 430-448... [Pg.264]

While the question of the viscoelastic properties of filled rubbers has been examined in greater detail, the dynamic properties of thermoplastics and thermosetting plastics have not been sufficiently studied. [Pg.38]

A. Lion. Strain-dependent dynamic properties of filled rubber a non-linear viscoelastic approach based on structural variables. Rubb. Chem. TechnoL, 72, 410 29,1999. [Pg.183]

M.l. Aranguren, E. Mora, C. W. Macosko, and J. Saam. Rheological and mechanical properties of filled rubber siUca-siUcone. Rubb. Chem. TechnoL, 67,820-833,1994. [Pg.183]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...