Melts compressibility

The carbides of the lanthanoids and actinoids can be prepared by heating M2O3 with C in an electric furnace or by arc-melting compressed pellets of the elements in an inert atmosphere. They contain the C2 unit and have a stoichiometry MC2 or M4(C2)3. MC2 have the CaC2 structure or a related one of lower symmetry in which the C2 units lie at right-angles to the c-axis of an orthogonal NaCl-type cell. They are more reactive than the alkaline-earth metal... 

T. Ruhl, P. Spahn, G.P. Hellmann, Polymer 44,7625 (2003) (Artifical opals prepared by melt compression see Example 3-43)... 

Continuum Depiction Local oscillation of the melt-wall boundary condition in the exit region causes peturbations on the exit stress and die swell Oscillation of the overall stress due to unstable boundary condition produces cycles of melt compression and decompression in the barrel and fluctuations in the extrude swell The extrudate distortion arises from formation of secondary flow (vortices) in the barrel due to the strong converging flow near the die entry... 

Melt compression molding identifies in-mold laminating and in-line molding of carriers, decorations, etc. The basic technique has been used for over a century. There has been an increased application of textile cover stock and leather substitutes both preferably with a soft touch. This type development was primarily initiated by the automotive industry with the objective to be prepared for future trends. Other industries such as furniture and packaging manufacturers use this process. 

An alternative to compression molding is melt compression. This procedure requires the polymer and drug to be heated 10°C above the of the polymer, forming a viscous solution. " The solution can then be either placed in a conventional mold under low pressure or injection molded. This fabrication method results in an even drug distribution. However, the... 

Fig. 10 Left Mean-field equation of state for the hydrophobic A strand melt, for = —15.15 and u>aaa = 0.564375 (see (15)). The vertical green line marks, at P/kgT = 0, the coexistence density of the melt with its vapor, Pa = 20. The red line marks the tangent to the P/kgT curve at P/ksT = 0,Pa = 20. Its slope is inversely proportional to the melt compressibility. Right The density distribution of the A and B bilayer components is shown across a free edge, membrane patch (see inset) which is thin in the z direction (i.e., vertically to the graph plane). The red and the green symbols correspond to the densities of the hydrophobic and the hydrophilic segments, respectively...

Dimitrov AS, Nagayama K (1996) Continuous convective assembling of fine particles into two-dimensional arrays on solid surfaces. Langmuir 12 1303 Ruhl T, Spahn P, Hellmann GP (2003) Artificial opals prepared by melt compression. 

Figure 22.14 Stress-strain curves, recorded at room temperature of melt-compression-molded films of poly(butyloxy-pora-meftl-phenylene) (PBmP) (55) (high-molar-mass part). For reference purposes, corresponding curves of a-PS, PMMA, and PC are also shown, illustrating the excellent mechanical properties of...

The first property can be deduced from the results of Section 1.02.5.2. Concentration fluctuations are weak since the melt compression modulus is high cv tl, where c is the concentration of repeat rmits. The correlation length of density fluctuations f is defined in eqn [96] which is qualitatively applicable for cv 1 giving that is, f is comparable with the statistical segment b for the standard beads-and-springs chain model. (More generally f in a polymer melt is comparable with the chain persistence length I)... 

Thermal spraying in which coating material is fed into an oxyfuel gas flame, where it is melted. Compressed gas may or may not be used to atomize the coating material and propel it onto the... 

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