Mixing, elongational

Styrene—butadiene—styrene modified bitumen is an elastomeric material mixed into an asphalt between 10 and 15%. By using high energy mixing, the SBS is uniformly dispersed throughout the asphalt to form a network, referred to as phase reversal because the minor component s (SBS) physical properties are displayed by the final mixture. A properly formulated SBS asphalt blend has an elongation of 100% or greater and is flexible down to temperatures below —6°C. 

The effect of configurational mixing of higher-lying s orbitals into the ligand field d-orbital basis set is also likely to favour elongation rather than contraction. ... 

For highly turbulent gas mixing in an enclosure and the vent area is restricted to one end of the elongated enclosure, ratio of length-to-diameter should not exceed 2, or... 

De Sarkar et al. [52] have reported a series of new TPEs from the blends of hydrogenated SBR and PE. These binary blends are prepared by melt mixing of the components in an internal mixer, such as Brabender Plasticorder. The tensile strength, elongation at break, modulus, set, and hysteresis loss of such TPEs are comparable to conventional rubbers and are excellent. At intermediate blend ratio, the set values show similarity to those typical of TPEs (Table 5.5). 

High modulus blends can be developed by mixing TPU with acetal copolymer (trioxane ethylene oxide copolymers) [242-244]. The highly crystalline acetal forms a second continuous phase. Kumar et al. studied behavior of such blends [245]. TPU retains none of its physical properties after immersion in water at 70°C for three weeks. The hydrolysis resistance of TPU can be improved by blending with polycarbodiimides [246]. Two parts of carbodiimide with TPU offer 87% retention of its strength, 93% of elongation, and 75% of modulus under the same... 

Extensive product trials using the LCBM technique in standard tire recipes have proved that the tensile strength and modulus, elongation at break, compound hardness, abrasion loss, and hot air aging properties have improved substantially compared to mixes prepared using conventional technique. 

Dias N., Senamaud-Beaueort G., Le Fo-RESTiER E., Auvin G., Helene G., Saison-Behmoaras T. E. RNA hairpin invasion and ribosome elongation arrest by mixed base PNA oligomer. J. Mol. Biol. 2002 320 489-501. 

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