Decane, model structure

Fig. 70. NSE spectra for 2% linear h-PI in deuterated n-decane at Q/A 1 values of 0.064 ( ), 0.089 ( ) and 0.115 ( ). The solid lines represent a common fit with the dynamic structure factor of the Zimm model (see Table 1) neglecting possible effects of translational diffusion. (Reprinted with permission from [174]. Copyright 1993 The American Physical Society, Maryland)...

Fig. 3.34 Normalized intermediate dynamic structure factor for the corona of a PS-PI diblock = 8.5 kg mol-1, 12% PS) in deuterated decane (2% polymer). Different symbols correspond to measurements at r//10AH = ( ) 26, (V) 32, ( ) 38, (X) 51, (O) 64, (A) 89, (O) 115. Solid lines correspond to a model described by Farago el al. (1993).

A number of other NMR-probed w/o microemulsions have appeared in recent literature. The diffusion coefficients in water/SDS/pentanol and ammonium hydro-xide/SDS/pentanol microemulsions investigated by Olsson et al. [35] estabhshed that replacement of water by ammonium hydroxide destabilizes the liquid crystalline phase and reduces the size of the colloidal association structure in the isotropic liquid region, Olsson and Schurtenberger [36] worked on nonionic microemulsions prepared from D2O, pentaethylene glycol dodecyl ether and decarie. Discrete oil-swollen micelles have been evidenced by NMR self-diffusion measurements the preparations are in conformity with the hard-sphere model. The NMR self-diffusion measurements on a water/octyl glucoside/pentanol/decane microemulsion system advocated a progressive decrease in the mean curvature of the surfactant film with water addition at a constant level of the oil [37]. It was concluded that the... 

While the features of the C chemical shift fine structure arising from tactidty effects upon the central methyl group of 3,5,7,9,11,13,15-heptamethyl h ta-decane can be accounted for with the Boyd and Breitling model of polypropylene incorporating conformationally-sraisitive y and d parameters, the five-state Suter-Flory model required only the y parameter and was shown to... 

Figures 2.8 through 2.12 illustrate the general C-H absorption spectra-structure correlation by using three model compounds trimethylpentane, -decane, and toluene. Note that there are 12 methyl C-H bonds and 6 methylene C-H bonds in trimethyl-pentane and there are 6 methyl C-H bonds and 16 methylene C-H bonds in n-decane. In the toluene molecule, there are 3 methyl C-H bonds 0 methylene C-H bonds and 5 aromatic C-H bonds.

The critical behavior of density fluctuations in microemulsions with a droplet structure can be treated analogously to simple fluids, because the radius is virtually constant throughout the phase separation and the droplet density may be regarded as an order parameter. Because of the nature of the droplet systems, its critical behavior is expected to belong to the 3D-Ising universality class. However, the observed critical exponents do not always coincide with the exact values of the 3D-Ising model. In particular, the well-known ternary system (WDA), consisting of an oil-rich mixture of water, n-decane, and AOT (dioctyl sulfosucdnate sodium salt) has been the subject of... 

Fig. 14. Examples of wax and polymer SANS profiles (triangles) from PEB- /wax mixed solutions in decane (Radulescu et al., 2004) for 0.6%PEB-7.5/l%C24 at -10°C (a) and 0.6%PEB-7.5/0.5%C36 at 0°C (b) the polymer self-assembling SANS patterns (circles) are shown in parallel in order to emphasize the structural changes induced by the addition of wax the curves represent model description of the data (see text).

Fig. 16. (a) Selective examples of SANS patterns collected at several temperatures where typical structures are revealed in decane solution of 1% tetra-block copolymer (Radulescu et al., 2011) the power-law scattering behaviour characteristic of different structures is indicated the arrow denotes the peak arising from intra-particle correlation as concluded following the observation of the constant peak-position for different o/ in solution, which is illustrated in (b) for the case of the tri-block copolymer in decane the red curve represents the description of data with the density-modulated rod model. 

How sharp is the interfacial region between water and an organic liquid and what is its molecular structure Broadly, three possibilities should be considered (1) the interface is sharp and flat, as assumed in continuum models (2) the interfacial region is a mixture of the two liquids and (3) the interface is a locally sharp but rough surface that fluctuates in time. Recent computer simulations of interfaces between water and benzene, " decane, nonane, hexane, dodecane, 1,2-dichloroethane (DCE), CCU, and octanol have dealt with this issue. 

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