Melting during

Miblimation The volatilization of a solid substance into the vapour phase without passing through the liquid phase. Also used to describe the process of purification in which the vapour is condensed directly from the vapour phase to a solid (on a cold-finger often cooled by refrigerant). In the latter case this substance may melt during the initial vaporization. Used for purification. 

Another means by which dispersed phases are produced is from those that separate from the melt during casting. These elements include iron... 

In Britain calcium stearate has been most commonly used with nontransparent products and stearic acid with transparent compounds. In the United States normal lead stearate, which melts during processing and lubricates like wax, is commonly employed. Dibasic lead stearate, which does not melt, lubricates like graphite and improves flow properties, is also used. 

The decomposition temperature is somewhat influenced by the rate of heating. The material does not form a clear melt during the decomposition,... 

The matrix is usually polypropylene and it is this which melts during processing to permit shaping of the material. The rubber filler particles then contribute the flexibility and resilience to the material. The other type of TPR is the polyamide and the properties of all five types are summarised in Table 1.4. 

The corrodent is a liquid metal in this form of stress corrosion cracking. Mercury at ambient temperature and metals including zinc (from galvanized steel-work) and copper (from electric cables) when melted during welding or in a fire cause rapid failure of certain metals. 

Weld Metal all metal melted during the making of a weld and retained in the weld. 

The paper contains a review with original theoretical and experimental data on the basis of the rheological behavior of gas-containing systems — thermoplastic melts — during extrusion. 

Fig. 8-17 Example of pressure loading on the plastic melt during IM.

The formation of ECC is not only an extension of a portion of the macromolecule but also a mutual orientational ordering of these portions belonging to different molecules (intermolecular crystallization), as a result of which the structure of ECC is similar to that of a nematic liquid crystal. After the melt is supercooled below the melting temperature, the processes of mutual orientation related to the displacement of molecules virtually cannot occur because the viscosity of the system drastically increases and the chain mobility decreases. Hence, the state of one-dimensional orientational order should be already attained in the melt. During crystallization this ordering ensures the aggregation of extended portions to crystals of the ECC type fixed by intermolecular interactons on cooling. 

Reports of kinetic studies do not always include an explicit statement as to whether or not the reactant melted during reaction or, indeed, if this possibility was investigated or even considered (cf. p. 1). This aspect of behaviour is important in assessing the mechanistic implications of any data since reactions in a homogeneous melt, perhaps a eutectic, usually proceed more rapidly than in a crystalline solid. It is accepted that the detection of partial or localized melting can be experimentally difficult, but, in the absence of relevant information, it is frequently impossible to decide whether a reported reaction proceeds in the solid phase. 

Alkanesulfonates are also suitable for antistatic modification of polyolefins, particularly polethylene. In addition, they improve the flow of polymer melts during processing. Typically added amounts are 1-2 phr. 

As a rule, the melts have a strong corrosive effect, not only on the reaction products but also on the various metallic and nonmetallic structural materials used to build the cells and reactors. At high current densities, sometimes the anode effect occurs in melts during electrolysis A gas skin is formed at the electrode surface, and there is intense sparking and a drastic increase in voltage. This effect depends on the anode material and on the melt anions, but its reasons are not fully understood. An important reason is insufficient wetting of the electrode surface by the melt, which causes sticking of gas bubbles to the surface. 

Aluminum and alloys of aluminum have very low melting points (660°C). All aluminum products will therefore melt during fires. This evidence together with steelwork distortions is not useful, and deeper analysis in this regard should be avoided. 

Similarly, one frequent prerequisite is that the pigments used have little or no effect on the physical and mechanical properties of the plastic. One example here is the change in rheological properties of PVC plastisols or of PVC melts during processing. 

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