Methyl ethyl ketone INDEX

Fig. 56. Dependence of specific refractive index increment on conversion of monomers to polymer for a styrene/acrylonitrile/methyl methacrylate terpolymer in methyl ethyl ketone at 20 °C and 436 nm. (a) - partial azeotrope, (b) terpolymer with composition distribution163 ...

Furby (12) has developed a method for evaluating stocks in the lubricating oil range that results in a breakdown of components into asphaltenes, resins, wax, and dewaxed oil and provides a yield-viscosity index relationship for the dewaxed oil. The author has found such analyses very useful and inexpensive for evaluating a large number of potential lubricating oil stocks. Furby s method utilizes petroleum ether to precipitate asphaltenes, a fuller s earth-petroleum ether fractionation to isolate resins, methyl ethyl ketone-benzene dewaxing on the deasphalted-deresinified material to separate wax, and an adsorption fractionation to provide cuts from which the yield-viscosity index relationship for dewaxed, solvent-refined oil is obtained. 

Capello et al.16 applied LCA to 26 organic solvents (acetic acid, acetone, acetonitrile, butanol, butyl acetate, cyclohexane, cyclohexanone, diethyl ether, dioxane, dimethylformamide, ethanol, ethyl acetate, ethyl benzene, formaldehyde, formic acid, heptane, hexane, methyl ethyl ketone, methanol, methyl acetate, pentane, n- and isopropanol, tetrahydrofuran, toluene, and xylene). They applied the EHS Excel Tool36 to identify potential hazards resulting from the application of these substances. It was used to assess these compounds with respect to nine effect categories release potential, fire/explosion, reaction/decomposition, acute toxicity, irritation, chronic toxicity, persistency, air hazard, and water hazard. For each effect category, an index between zero and one was calculated, resulting in an overall score between zero and nine for each chemical. Figure 18.12 shows the life cycle model used by Capello et al.16... 

We have examined experimentally the response of the light-scattering instrument to scattering using the same polystyrene standards in solvents of different index of refraction. We made a series of measurements on two polystyrene standards (Millipore nominal = 8500, P/N 25171, Lot 80314 and Waters nominal = 110,000, P/N 41995, Lot 70111) dissolved in five solvents [acetone, methyl ethyl ketone (MEK), tetrahydro-naphthalene, THE, and toluene]. 

Properties White, crystalline solid. Fp 70C, bp 265C, d 1.048 (20/4C), viscosity 3.47 centistokes (0C), 1.54 centistokes (120C), refr index 1.4859 (75C), flash p 275F (135C) (COC). Soluble in methanol, ethanol, isopropanol, Cellosolve (12C), naphtha, benzene, methyl ethyl ketone, and linseed oil insoluble in water and 10% sodium hydroxide. Combustible. 

Properties Liquid. Bp 68C, fp -23C, refr index 1.474, d 1.22, dipole moment 1.98 (D). The polymer is soluble in toluene, chloroform, and methyl ethyl ketone and has dielectric constant of 2.56. Nonflammable. 

In this project, distinguishing properties of the 10 organic liquids should be observed (Part A) and unknowns subsequently identified (Part B) according to an SOP which I wrote for this. The properties are (1) water miscibility, (2) density, (3) viscosity, (4) refractive index, and (5) odor. The 10 organic liquids are acetone, methanol, ethanol, isopropyl alcohol, heptane, cyclohexane, toluene, methyl ethyl ketone, butanol, and ethyl acetate. 

According to the Merck Index - Clove oil, 82-85% eugenol, including about 10% acetyl eugenol, caryophyllene, small quantities of furfural, vanillin, and methyl ethyl ketone. 

Q and C2 in Pa. Mooney-Rivlin Equation constants. For the equation, see Ferry (1980). Weight swelling index measured in methyl ethyl ketone at 25° C. 

TABLE IIL Environmental Indexes for Methyl Ethyl Ketone (ME and the... 

Many cellulose derivatives form lyotropic liquid crystals in suitable solvents and several thermotropic cellulose derivatives have been reported (1-3) Cellulosic liquid crystalline systems reported prior to early 1982 have been tabulated (1). Since then, some new substituted cellulosic derivatives which form thermotropic cholesteric phases have been prepared (4), and much effort has been devoted to investigating the previously-reported systems. Anisotropic solutions of cellulose acetate and triacetate in tri-fluoroacetic acid have attracted the attention of several groups. Chiroptical properties (5,6), refractive index (7), phase boundaries (8), nuclear magnetic resonance spectra (9,10) and differential scanning calorimetry (11,12) have been reported for this system. However, trifluoroacetic acid causes degradation of cellulosic polymers this calls into question some of the physical measurements on these mesophases, because time is required for the mesophase solutions to achieve their equilibrium order. Mixtures of trifluoroacetic acid with chlorinated solvents have been employed to minimize this problem (13), and anisotropic solutions of cellulose acetate and triacetate in other solvents have been examined (14,15). The mesophase formed by (hydroxypropyl)cellulose (HPC) in water (16) is stable and easy to handle, and has thus attracted further attention (10,11,17-19), as has the thermotropic mesophase of HPC (20). Detailed studies of mesophase formation and chain rigidity for HPC in dimethyl acetamide (21) and for the benzoic acid ester of HPC in acetone and benzene (22) have been published. Anisotropic solutions of methylol cellulose in dimethyl sulfoxide (23) and of cellulose in dimethyl acetamide/ LiCl (24) were reported. Cellulose tricarbanilate in methyl ethyl ketone forms a liquid crystalline solution (25) with optical properties which are quite distinct from those of previously reported cholesteric cellulosic mesophases (26). 

S.I. = swelling index = wt., swoUen/wt., dry. Vitons in methyl ethyl ketone and all others in toluene. 

The second method of determining MWD is turbidimetric titration. Beattie [156] developed an absolute turbidimetric titration method for determining solubility distribution (which is closely related to MWD) of PS. In this method a polymer is precipitated from its solution in methyl ethyl ketone by addition of a non-solvent (isopropanol) of the same refractive index as that of the solvent. He showed, by the use of light scattering theory, that under these conditions the concentration of polymer that is precipitated can be calculated from the maximum turbidity on an absolute basis. Beattie concluded that with PS, under the specified conditions, the reproducibility of turbidimetric precipitation curves is very good and that the method is accurate. Gooberman [157] also studied PS but dissolved the polymer in butanone and titrated with isopropanol. 

Diagnostic Industry publication MDI methane diisocyanate MDPE medium density polyethylene Me metallocene catalyst MEK methyl ethyl ketone ME melamine formaldehyde mfg manufacturing MEI melt flow index Mfr. manufacturer MET manufacturers ft)r fiiir trade mg milligram... 

The role of solvents is to reduce the viscosity of adhesives and to improve fluidity. That can provide the adhesives wettability to create an intimate contact with the surface of adherends. Solvents must be able to dissolve the components of adhesives. Solubility parameter is an index to show the soliditivity of solvents. A solvent can dissolve a high amount of materials whose solubility parameters are close to that of the solvent. Water, alcohols, aromatic hydrocarbons (e.g., toluene and xylene), ketones (e.g., methyl ethyl ketone and cyclohexanone), acetate esters (e.g., ethyl acetate and butyl acetate), n-hexane, cyclohexane, methylene chloride are used due to their solubility, dehydration rate, noncombustibility, and workability. To meet the demands concerning environmental issues, the use of some solvents such as toluene, xylene, ethylbenzene, and styrene is restricted bylaws such as the air pollution control law legislated by Ministry of the Environment in Japan (The Ministry of the Environment 1996). 

Methyl Ethyl Ketone, conforming to Specifications D740, having a refractive index 20 C (68 F) of 1.378 0.002 as determined in accordance with Test Method D 1218 or conforming to the following specifications ... 

Properties Cl. brn. sol. in toluene, mineral spirits, ethanol, acetone, methyl ethyl ketone isopropanol, methyl cellosolve, ethyl acetate insol. in water, glycerin, liq. paraffinsp.gr. 1.00 vise. 1000 cSt f.p. < -20 C max. flash pt. 234 C ref. index 1.451... 

ASTM D3616-95 [1] describes a method for determining of gel, swelling index and dilute solution viscosity (DSV). The method has been developed for E-SBR and NBR, and toluene and methyl ethyl ketone, respectively, are used as solvents. The method is for the determination of macrogel content hut it may also be used for microgel, a particle... 

Ethyl (E)-2-methyl-2-butenoate Ethyl trans-2-methyl-2-butenoate. See Ethyl tiglate Ethyl 2-methylbutyl ketone. See Methylheptanone Ethyl 2-methyl butyrate CAS 7452-79-1 EINECS/ELINCS 231-225-4 FEMA 2443 Empirical C7H14O2 Formula CH3CH2CH(CH3)COOC2Hs Properties Colorless llq. powerful green fruity pungent odor sol. in alcohol, propylene glycol misc. with fixed oils very si. sol. in water m.w. 130.19 dens. 0.868 (20/4 C) b.p. 130-133 C flash pt. 26 C ref. index 1.397 (20 C)... 

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