Decane physical properties

Two of the physical properties which are affected by temperature are vapor pressure and viscosity. The vapor pressure of n-decane approximately doubles with each rise of 10 C. This increase would double the evaporation rate and should, theoretically at least, halve the contact time of the hydrocarbon on the plant. The effects of injurious oils are closely correlated with the length of time they remain in or on the plant. Thus, consider-... 

Physical properties are related to ester-segment structure and concentration in thermoplastic polyether-ester elastomers prepared hy melt transesterification of poly(tetra-methylene ether) glycol with various diols and aromatic diesters. Diols used were 1,4-benzenedimethanol, 1,4-cyclo-hexanedimethanol, and the linear, aliphatic a,m-diols from ethylene glycol to 1,10-decane-diol. Esters used were terephthalate, isophthalate, 4,4 -biphenyldicarboxylate, 2,6-naphthalenedicarboxylate, and m-terphenyl-4,4"-dicarboxyl-ate. Ester-segment structure was found to affect many copolymer properties including ease of synthesis, molecular weight obtained, crystallization rate, elastic recovery, and tensile and tear strengths. 

SS. Hofmann, "Note" (1850). For instance, the known hydrocarbon amyl hydride (today called pentane), QoHk/ was known to boil at 30"C, while the newly discovered purported "amyl radical," C,oH, boiled at 15S°C. Why would removing a single hydrogen atom produce such a dramatic change in physical properties if "amyl" were really di-amyl, C20H22 (today called decane), on the other hand, this and other physical properties of "amyl" would make perfect sense. The data on boiling points was supplied by Hermann Kopp. 

Physical Properties Colorless bquid Commercially available as 70 and 90% aqueous solutions and as "anhydrous solutions" in hydrocarbon solvents (e.g., decane) 70% aq TBHP bp 96 °C, mp -3 °C Moderately soluble in water... 

Physical properties Pentane Hexane Heptane Octane Nonane Decane Dodecane... 

Even dynamic measurements have been made on mixtures of carbon black with decane and liquid paraffin [22], carbon black suspensions in ethylene vinylacetate copolymers [23], or on clay/water systems [24,25]. The corresponding results show that the storage modulus decreases with dynamic amplitude in a manner similar to that of conventional rubber (e.g., NR/carbon blacks). This demonstrates the existence and properties of physical carbon black structures in the absence of rubber. Further, these results indicate that structure effects of the filler determine the Payne-effect primarily. The elastomer seems to act merely as a dispersing medium that influences the magnitude of agglomeration and distribution of filler, but does not have visible influence on the overall characteristics of three-dimensional filler networks or filler clusters, respectively. The elastomer matrix allows the filler structure to reform after breakdown with increasing strain amplitude. 

This work results in correlations which can be used to predict parameters for the RK equation of state for hydrocarbon and other nonpolar components for which the critical pressure, critical temperature, and acentric factor are known or can be estimated. However, the applicability of the correlations to large molecules is unproven because the generalized correlations of physical and thermodynamic properties used to develop Oa and Ob are based on components no heavier than n-decane (acentric factor = 0.4885). Although the predicted parameters are based on properties for the saturated liquid phase, the parameters are applied to both vapor and liquid phases. For components above their critical temperature (a reduced temperature greater than 1.00), the values of fia and Ob determined at a reduced temperature of unity are used. 

Example QSPR studies are then presented, including the boiling points of decanes, the physical density of propyl acrylates and the search for a biological/pharmaceutical property responsible for the anti-mycobacterial activity of quinolones. 

Chemical Designations — Synonyms Bicyclo [4.4.0] Decane Naphthalane Perhydronaphthlene Dec Decalin De Kalin Naphthane sic- or trans-Decahydronaphthalene Chemical Formula C,oH,g. Observable Characteristics — Physical State (as normally shipped) Liquid Color Colorless Odor Aromatic, like turpentine mild, characteristic. Physical and Chemical Properties — Physical State at 15"C and 1 atm. Liquid Molecular Weight 138.2 Boiling Point at 1 atm. 383, 195, 468 Freezing Point -44, -42, 231 Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 0.89 at 20 C (liquid) Vapor (Gas) Density Not pertinent Ratio of Specific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization 130, 71, 3.0 Heat of Combustion -19,200, -10,700, -447 Heat of Decomposition Not pertinent. Health Hazards Information — Recommended Personal Protective Equipment Air mask or self-... 

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