Thermal analysis results

The thermal analysis results (Figure 9.4) indicate that most of the materials show a clear phase segregation with two, distinct glass transition temperatures, indicated in Table 9.3 as and respectively. The Tg, value is around -80/ - 90°C close to, although somewhat higher than, that of the polyhydroxy... 

Differential Thermal Analysis. Results obtained from thermal analysis are shown in Figure 1. Except for the C6, C5, and C4 members, the potassium soaps themselves undergo an endothermic phase transition... 

Fig. 1. Schematic thermal analysis results on fusion and devitrification (top and bottom curves, respectively). The area under the peak in the top curve represents the heat of fusion Hf and can be used to calculate the entropy of fusion ASf = AHf/Tm in case of equilibrium melting. The increase in heat capacity ACP at Tg is related to the number of motifs that gain mobility...

Figure 4. Differential thermal analysis results (1) benzene-water-HCl on Z200H, (2) butanediol-water on Z500, (3) butanediol-water on Z200H...

Thermal analysis results of chromia/alumina samples. 

The presence of one phase In the xnelt for PB/EMA or PE/EMA-salt blends is not inconsistent with the thermal analysis results presented previously (17). It has been determined that there is separate crystallization of PE and EMA or EMA-salt in PE/EMA of PE/EMA-salt blends. In fact, even for two polymers which form one phase in the melt, co-crystallization is quite difficult to Induce. Kyu et al. (42) have shown that blends of linear and branched polyethylenes do not have the ability to cocrystallize and Prud homme (43) has shown that it suffices to have a small difference in molecular weight between two poly(ethylene oxides) to have separate crystallization. Therefore, homogeneity in the melt does not hinder the separate crystallization of the two conqponents of the mixture. 

FIGURE 6 Thermogravimetric and differential thermal analysis results from a granulation blend of a hydrated API. The thermogravimetric curve is dotted the differential thermal analysis curve is solid the derivative of the thermogravimetric curve is dashed. 

Figure 7.X Oillerentiul thermal analysis results—the decomposition of nickel hydroxide ...

Thermal analysis results are not usually considered in the widest chemical context. 

XRD, IR and visible spectra results confirm the intercalation of the anion, while thermal analysis results indicate an enhanced stability of the complex upon intercalation. 

In the batch reactor, both supports decompose the HAN-water mixture at the same temperature (77 and 74 °C) this temperature is lowered by comparison with thermal analysis results, due to different reaction conditions. The pressure increases are close, corresponding to the same kinetic gaseous products. The decomposition rate, measured by the pressure slope AP.Af (Table 1) displays a better activity for the °°Pt/Al203Si catalyst (134 mbar.s ) linked to the larger specific area. 

Recommendations for reporting thermal analysis results, including thermogravimetry results, have been made by the Standardisation Committee of ICTAC and appear in standards such as ASTM E 472 (1991). Not all of the points listed may be known, if commercial equipment is used, but as much as possible should be reported. 

Chapter 2 Basics of Thermal Analysis contains definitions of systems, flux, and production and the following thermodynamic functions of state which are needed for the description of thermal analysis results heat capacity, enthalpy, entropy, and free enthalpy. 

The thermal characterization of all polymers was done on a Polymer Laboratories calorimeter, modell STA 625. The heating and cooling rates were always lOK/min. Thermal analysis results for three homopolymers with spacer lengths n=3, n=5 and n=9 are given in Table 1. 

Figure 7.21. (a) Topographic image of packaging film showing the 1 pm skin layer with holes from the local thermal analysis (b) local thermal analysis results showing transition temperatures of skin layer (7 = 80 °C), core layer (7 = 150°C), and epoxy matrix (Tg = 66 °C). [from Gotzen and Van Assche (2007)]. 

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