Melts, rupture

Yamamura, Y. Ooizumi, S. Yamamoto, K. Separator for rechargeable lithium ion batteries with high puncture strength and high melt rupture temperature. Nltto Denko Technol. Rep. (http /Mww.nitto.com/rd/rd6 l.html), 2001, 39, 39. 

Recently Nitto Denko developed a battery separator made by a wet process that had high puncture strength and high heat rupture resistance. They used a polyolefin resin with a high-molecular-weight rubber as its main component materials and cross-linked through oxidation in air. The melt rupture temperature, as measured by thermomechanical analysis, was over 200°C in this material. They also tried cross-linking UHMWPE with electron-beam and ultraviolet irradiation, but this had the... 

Goto A (1999) A new model for volcanic earthquake at Unzen Volcano Melt rupture model. Geophys Res Lett 26(16) 2541-2544... 

There are, of course, many more ceramics available than those listed here alumina is available in many densities, silicon carbide in many qualities. As before, the structure-insensitive properties (density, modulus and melting point) depend little on quality -they do not vary by more than 10%. But the structure-sensitive properties (fracture toughness, modulus of rupture and some thermal properties including expansion) are much more variable. For these, it is essential to consult manufacturers data sheets or conduct your own tests. 

The mechanical behavior of plastics is dominated by such viscoelastic phenomena as tensile strength, elongation at breaks, stiffness, and rupture energy, which are often the controlling factors in a design. The viscous attributes of plastic melt flow are also important considerations in the fabrication of plastic products. (Chapter 8, INFLUENCE ON PERFORMANCE, Viscoelasticity). 

Since anthracene dimers split to form anthracene monomers upon melting, it may be possible that if the excess vibrational energy in the hot dimer is not dissipated by solvent collisions<88> rapidly enough the bonds may rupture and monomers may be produced,... 

Why is melt filtration necessary and how is it accomplished What would an operator observe if a melt filter were to rupture ... 

Since acetic melts at 62 F, shipping pure grades poses a special problem. Cool weather can cause freezing, expansion, and container rupture. 

The dinitramide ion is stable in both acidic and basic solutions between pH 1-15 at room temperature but is slowly decomposed in the presence of strong concentrated acid. In contrast to alkyl V,V-dinitramines (Section 6.11.2) where the central nitrogen atom is highly electron deficient, the dinitramide anion has its negative charge delocalized over both nitrogen and oxygen atoms with the consequence that the N-N bonds are less susceptible to rupture. However, the dinitramide anion is not as stable as the nitrate anion ammonium dinitramide melts at 92 °C and decomposition starts at 130 °C. 

The value for n is often given as 2/3, but polymer melts have shown a wide range of values. The constant a is associated with rupture of the linkages in the structure of the fluid. The effect of different values of a, ie, at the same values of r 0 and rj, is shown in Figure 4. As a increases, breakdown occurs at lower and lower shear rates. 

Model investigations undertaken using high-density polyethylene pipe dosed with particulate aluminum flaws of known size showed that resistance to stress rupture increased significantly after removal of larger stress raising particles by melt filtration [164]. 

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