Decane different temperatures

Temperature Effects. The chemical ionization spectra of three paraffins (n-decane, 2,2,3,3-tetramethylhexane (compound 13), and 2,2,5,5-tetramethylhexane (compound 14) have been determined at several different temperatures of the mass spectrometer ionization chamber, and the relative intensities obtained for the MW — 1 ions are give in Table VII. The relative intensities decrease for all three compounds as the temperature increases, in accordance with the behavior found for the chemical ionization spectrum of ethyl-/3-chloropropionate... 

The formation of decanal - starch - complexes with time at different temperatures is presented in Figure 1. The reaction is completed in a matter of minutes, and a stable equilibrium is obtained. Isotherms of complex formation are shown in Figure 2. The complex formation starts at very low concentrations and comprises appreciable amounts of ligand. We are actually studying these reactions in some detail and are interested in the consequences of these interactions for taste and odor perception. As reported elsewhere, the complexed ligands, if present in dry state, have a remarkably increased chemical stability (25). 

Fig. 23 (a) Frequency-dependent linear viscoelastic moduli (G closed symbols, G" open symbols) of a colloidal star with nominal values f = 12Sarms and = SOkgmol at a concentration 5 wt% in -tetradecane and different temperatures (circles 40°C, squares. 5O C. triangles 55°C). A liquid-lo-solid transition is marked between 50 and 55°C. Lines with slopes 1 and 2 indicate terminal behavior of G" and G, respectively. Inset The temperature dependence of the hydrodynamic radius /fh of the same star, indicating swelling, (b) Respective moduli for the same system at 4() C in two different solvents, n-decane (circles, solid-like behavior) and n-tetracane (triangles, Uquid-Uke behavior) [26]... 

In binaiy mixtures of caibon dioxide and the normal hydrocarbons heavier than C7, coexisting liquid-vapour, liquid-liquid, and liquid-liquid-vapour phase splits have been observed above 273.15 K. Pressure-composition diagrams predicted by the PR equation of state for carbon dioxide/decane mixtures at two different temperatures are shown in Figures 5. At 260 K, binaiy mixtures of carbon dioxide and decane separate into a liquid and a vapour phase at low pressures. As the pressure is increasexl, a value is... 

One experimental run, with the same catalyst loading, was divided into sequences consisting of different temperature, pressure and naphthalene concentration. The first, the last and every seventh sequence were carried out in reference conditions (120°C, 20 bar and 5 mol-% naphthalene) to normalise the experiments and to study the degree of deactivation. Naphthalene concentration in decane was 1, 3, 5 or 8 mol-% and temperature was changed from 85 to 160°C (15°C intervals) under hydrogen pressure of20,30 or 40 bar. 

Fig. 20. Examples of contrast matched polymer (circles) and wax (triangles) scattering patterns from 1% tri-block/4 %C24 decane solution at two different temperatures. The curves and arrows have the same meaning as in Fig.18.

Fig. 33 Structures diagram for the PEB-II/C24 system in decane the temperature dependence of the polymer and wax structure evolution as a function of wax content in solution. The capital letters denote the structural regimes delimited by lines and identified as C coil conformation, R rod structure, P platelets, B three-dimensional bulk aggregates. On the right side the different structures are sketched schematically. The data points indicate the temperature/wax concentration conditions, where SANS experiments were performed, while the symbols denote the structures (closed circles coils, closed triangles rods, closed squares platelets and closed diamonds three-dimensional bulk aggregates)...

One of the systems studied was a polystyrene-b/ocfc-poly(ethylene/propylene) (37300 59700 Mn) copolymer in decane. Electron microscopy studies showed that the micelles formed by the block copolymer were spherical in shape and had a narrow size distribution. Since decane is a selectively bad solvent for polystyrene, the latter component formed the cores of the micelles. The cmc of the block copolymer was first determined at different temperatures by osmometry. Figure 13 shows a plot of n/cRT against c (where c is the concentration of the solution) for T=91A °C. The sigmoidal shape of the curve stems from the influence of concentration on the micelle/unassociated-chain... 

A somewhat different water, decane, and AOT microemulsion system has been studied by Feldman and coworkers [25] where temperature was used as the field variable in driving microstructural transitions. This system had a composition (volume percent) of 21.30% water, 61.15% decane, and 17.55% AOT. Counterions (sodium ions) were assigned as the dominant charge transport carriers below and above the percolation threshold in electrical... 

FIGURE A.1 Variation of y with temperature for different alkanes (C5 n-pentane C10 ra-decane C16 n-hexadecane). 

Figure 11-1. Temperature dependence of the partitioning of benzene (5) between water (w) and //-alkanes (a) of different chain lengths octane ( ), decane ( ), dodecane (A), tetradecane (H), and hexadecane (O)-In (C), die left vertical scale pertains when Flory—Huggins theory is applied to both die a and w phases, whereas die right vertical scale pertains when Rory—Huggins theory is applied only to die a phase. The figure is taken from de Young and Dill [ 17] with permission...

Binding parameters and X-ray diffraction patterns of the complex of starch with 1-decanal do not differ significantly from corresponding analyses performed using 1-decanol.656,679 The temperatures of formation of the aldehyde complexes are likewise close to those for relevant starch-alcohol complexes.673,680 Analysis of the binding sites of the complex suggests that both amylose and amylopectin are involved in complexation, but these complexes are rather weak.717... 

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