On the melting temperature

Buffat P and Borel J P 1976 Size effect on the melting temperature of gold particles Phys. Rev. A 13 2287... 

Fig. I. Effect of pressure on the melting temperature of argon, (a) Pure argon, (b) argon-helium, (c) argon-hydrogen.Qualitative difference between curves (b) and (c) is due to the effect of composition on the liquid-phase fugacity of argon (M6).

Figure 8.21 Effect of pressure on the melting temperatures of. ViCftHft + assuming ideal solution behavior.

Figure 20.7 The effect of pre-heating temperatures and blend composition on the melting temperatures of the PHB/PEN/PET blends , 260°C O, 280 °C A, 300 °C...

Prior to setting up crystallization experiments, the concentrated RNA has to be properly folded in the native state. This is performed by a heating step in a heating block for 1 min at 70 to 85°C (depending on the melting temperature), in the presence of monovalent salts only. Then, the solution is left in the switched-off heating-block to cool down slowly until room temperature is reached. In order to avoid... 

Figure 14.17a summarizes the effect of pressure on the melting temperature, while Figure 14.17(b) shows the effect of temperature on the melting pressure, for the (benzene +1,4-dimethylbenzene) system. The... 

Figure 14.17 Ideal solution prediction of (a) the effect of pressure on the melting temperature, and (b) the effect of temperature on the melting pressure, for X1QH6 + X2P-C6H4(CH3)2. The equilibrium curves to the left are for C6H6, while those to the right are for p-C6H4(CH3)2. (c) is a schematic representation of the (p, T, jc) surface that leads to the isobaric sections shown in (a) and the isothermal sections shown in (b).

The line-decomposition analysis of the equilibrium spectrum of the a-meth-ylene carbon was carried out using the elementary line shapes thus obtained for the three phases. The result is shown in Fig. 24. The composite curve of the decomposed components reproduces well the experimentally observed spectrum. The mass fraction of the crystalline component was estimated as 0.60 that is described in the figure. Based on the heat of fusion of 8.13 KJ/mol of this sample and the value of 14.2 KJ/mol for the crystalline material of this polymer the crystalline fraction was estimated to be 0.57. Here the heat of fusion for the crystalline material was obtained from the effect of diluent on the melting temperature with use of the relationship developed by Flory [91 ]. The crystalline fraction estimated from the NMR analysis is in good accord with the value estimated from the heat of fusion, supporting the rationality of the NMR analysis. 

We consider here the effect on the boiling point, ZJ, of a liquid of adding some solid (solute) to it. Figure 51.1 illustrates some relevant thermodynamic features relating to the addition of a solute to a pure liquid (solvent) to form a solution and the corresponding effect on the melting temperature, Tm and boiling temperature, T, . 

Figure 4.22 Influence of the specific mechanical energy input on the melt temperature...

The discharge pressure to be generated by the screws at the screw tip has a substantial influence on the specific energy input and ultimately on the melt temperature and product quality. It is extremely important, therefore, that it remains constant. 

The effect of clay and CNTs on the melt temperature, crystallization temperature, glass transition temperature and crystallinity of polymer matrix should be carefully investigated, as they are often related to different properties of the composites. 

The effect of the chemical nature of the main chain of the polymer on the glass transition temperature is similar to the effect that it has on the melting temperature, T. The chemical structure has a determining influence on the flexibility of the chain. For example, polymers such as polyethylene, (—CH2 — CH2—) , and polyoxyethylene, (—CH2—CH2 — O—) , have relatively flexible chains as a result of the ease of rotation around their chain bonds. Thus they have low values of Tg and as can be seen in Table 2.3. The incorporation into the main chain of units that hinder rotation and consequently increase the rigidity of the chain clearly causes a large increase in Tg. For example, the incorporation of a p-phenylene ring (Ph) into the monomeric unit of polyethylene gives poly(p-xylylene), which has a Tg of around 353 K (see Table 2.3). 

---