scholarly journals Effect of alkane chain length on tribological properties of straight chain alkane liquid film

2019 ◽  
Vol 68 (22) ◽  
pp. 228101
Author(s):  
Zhao-Hui Zhang ◽  
Xiao-Dong Yu ◽  
Hai-Peng Li ◽  
Kui Han
Keyword(s):  
Liquid Film ◽  
Chain Length ◽  
Tribological Properties ◽  
Straight Chain ◽  
Alkane Chain

Influence of Cation Na/Ca Ratio on Adsorption in LTA 5A:  A Systematic Molecular Simulation Study of Alkane Chain Length

2006 ◽  
Vol 110 (47) ◽  
pp. 23968-23976 ◽  
Author(s):  
E. García-Pérez ◽  
D. Dubbeldam ◽  
T. L. M. Maesen ◽  
S. Calero
Keyword(s):  
Molecular Simulation ◽  
Chain Length ◽  
Simulation Study ◽  
Alkane Chain

Comparison between Molecular Structure Effects in Triplet Positronium Annihilation Rates and Radiolysis Free Ion Yields in Liquid Hydrocarbons

1972 ◽  
Vol 50 (16) ◽  
pp. 2697-2698 ◽  
Author(s):  
G. R. Freeman ◽  
J.-P. Dodelet
Keyword(s):  
Molecular Structure ◽  
Chain Length ◽  
Molecular Interaction ◽  
Half Life ◽  
Density Effect ◽  
Liquid Hydrocarbons ◽  
Positronium Annihilation ◽  
Free Ion ◽  
Alkane Chain ◽  
Ion Yields

Two seemingly unrelated phenomena in liquid hydrocarbons have similar trends in their dependences upon the molecular structure of the hydrocarbon. The phenomena are the annihilation half-life of triplet positronium and the radiolysis free ion yield. In n-alkanes the effect of increasing the molecular chain length, upon both phenomena, appears to be simply to increase the density of interacting sites. Branching the alkane chain decreases the strength of molecular interaction with both electrons and positronium, although the relative decrease is much greater for the former than for the latter. The effects of double bonds on the phenomena, after separating out the density effect, are different from each other.

A Sex Attractant for the Siberian Moth Dendrolimus superans sibiricus (Lepidoptera: Lasiocampidae)

2000 ◽  
Vol 35 (2) ◽  
pp. 158-166 ◽  
Author(s):  
Jerome A. Klun ◽  
Yuri N. Baranchikov ◽  
Victor C. Mastro ◽  
Yousef Hijji ◽  
Jesse Nicholson ◽  
...  
Keyword(s):  
Chain Length ◽  
Sex Attractant ◽  
Capture Rate ◽  
Virgin Female ◽  
Field Trapping ◽  
Straight Chain ◽  
Female Moth ◽  
Siberian Moth ◽  
Rubber Septa ◽  
Dendrolimus Superans

Field trapping experiments were conducted against the Siberian moth, Dendrolimus superans sibiricus Butler, in Siberia, Russia, using traps baited with a virgin female moth or 100 μg synthetic mixtures of C12 straight chain-length aldehydes, alcohols, and acetates alone or in combinations on rubber septa. Traps baited with a 1:1 blend of aldehydes and alcohols captured many males. The capture rate was similar to the rate of capture seen in traps baited with virgin females. The mixture of aldehydes and alcohols (64% Z,E-5,7-dodecadienal, 10% Z-5-dodecenal, 18% E-7-dodecenal, 8% E-6-dodecenal) and (64% Z,E-5,7-dodecadien-1-ol, 10% Z-5-dodecen-1-ol, 18% E-7-dodecen-1-ol, 8% E-6-dodecen-1-ol) can be used as a sex attractant to monitor endemic Siberian moth populations in Asia, and for surveillance and detection of the moth in countries where the insect might be accidentally introduced.

scholarly journals Effect of Alkane Chain Length on Crystallization in Emulsions during Supercooling in Quiescent Systems and under Mechanical Stress

Processes ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 6 ◽  
Author(s):  
Serghei Abramov ◽  
Kinza Shah ◽  
Lydia Weißenstein ◽  
Heike Karbstein
Keyword(s):  
Mechanical Stress ◽  
Chain Length ◽  
Alkane Chain

scholarly journals Effect of Alkane Chain Length on Crystallization in Emulsions during Supercooling in Quiescent Systems and under Mechanical Stress

2017 ◽  
Author(s):  
Serghei Abramov ◽  
Kinza Shah ◽  
Lydia Weißenstein ◽  
Heike Petra Karbstein
Keyword(s):  
Mechanical Stress ◽  
Chain Length ◽  
Crystallization Behavior ◽  
Droplet Diameter ◽  
Alkane Chain

Crystallization behavior of hexadecane (C16H34), octadecane (C18H38), eicosane (C20H42), and docosane (C22H46) dispersions of similar mean droplet diameter (x50.2 ≈ 15 µm) was investigated in quiescent systems and compared to crystallization under mechanical stress. In quiescent systems, the required supercooling decreased with increasing chain length of the alkanes to initiate crystallization. Crystallization of alkane dispersions under mechanical stress resulted in similar onset crystallization supercooling, as during quiescent crystallization. Increase of mechanical stress did not affect the onset crystallization supercooling within alkane dispersions.

Material Transfer in Cubosome−Emulsion Mixtures: Effect of Alkane Chain Length

Langmuir ◽  
2010 ◽  
Vol 26 (13) ◽  
pp. 10670-10676 ◽  
Author(s):  
Anniina Salonen ◽  
Christian Moitzi ◽  
Stefan Salentinig ◽  
Otto Glatter
Keyword(s):  
Chain Length ◽  
Material Transfer ◽  
Alkane Chain

Effect of Alkane Chain Length and Counterion on the Freezing Transition of Cationic Surfactant Adsorbed Film at Alkane Mixture – Water Interfaces

2015 ◽  
Vol 119 (20) ◽  
pp. 6235-6241 ◽  
Author(s):  
Yuhei Tokiwa ◽  
Hiroyasu Sakamoto ◽  
Takanori Takiue ◽  
Makoto Aratono ◽  
Hiroki Matsubara
Keyword(s):  
Chain Length ◽  
Cationic Surfactant ◽  
Adsorbed Film ◽  
Freezing Transition ◽  
Alkane Chain

Thermodynamics of Mixing of n-Alkanes with Polyisobutylene

1969 ◽  
Vol 42 (5) ◽  
pp. 1397-1408
Author(s):  
P. J. Flory ◽  
J. L. Ellenson ◽  
B. E. Eichinger
Keyword(s):  
Equation Of State ◽  
Chain Length ◽  
Chemical Potential ◽  
Volume Changes ◽  
Direct Measurements ◽  
Yield Values ◽  
Statistical Mechanical ◽  
Thermodynamics Of Mixing ◽  
Alkane Chain ◽  
Nonpolar Molecules

Abstract The volume changes on mixing polyisobutylene (PIB) with n-pentane, n-hexane, n-heptane, n-octane, n-decane, and n-hexadecane have been determined by direct measurements at 45°, and for n-heptane at 0 and 50° as well. They are negative in every case; the magnitude of the excess volume decreases with chain length, and increases with temperature. These results on volume changes, which are beyond the scope of conventional theories of polymer solutions, are rationally taken into account by the recent statistical mechanical theory of solutions which relates properties of the mixture to characteristics of the pure liquids manifested in their equation-of-state parameters. The negative enthalpies of mixing found by Delmas, Patterson, and Somcynsky for all of these systems with the exception of PIB-n-hexadecane are similarly shown to arise from negative equation-of-state contributions to the enthalpy which reflect differences between the liquid characteristics of n-alkane and PIB. The energy contributed by interchange of neighbor species in contact is shown to be small but positive, as should be expected for the nonpolar molecules involved. It diminishes with chain length of the alkane, becoming little greater than zero in the limit of an infinite alkane chain (polymethylene). Osmotic pressures of concentrated solutions (∼ 15–50%) of PIB in n-octane at 25° yield values of the residual chemical potential, expressed in terms of the conventional parameter χ, which are well reproduced by the theory without arbitrary parameters. The partial molar enthalpy and entropy of dilution are dominated by equation-of-state contributions rendering both of them negative, despite the large positive combinatory entropy. The appearance of critical miscibility at higher temperatures is thus predicted by the theory without resort to special explanations.

Sign in / Sign up

Export Citation Format

Share Document