The sorption of vapours by nitrocotton

McBain, James W.; Good, Sonya; Bakr, Abu; Davies, D. P.; Willavoys, H. J.; Buckingham, Robert

doi:10.1039/tf9332901086

Cited by 11 publications

(3 citation statements)

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“…It is of interest in this connection to analyze adsorption data for a polymer for which dilute solution measurements can also be made, even though numerical agreement need not be expected. In figure 4 is plotted, among others, the activity of acetone adsorbed by a sample of cellulose nitrate studied by Good and McBain (16). For comparison the data for cellulose, salmine, and wool have been included.…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, µ is far from constant in the region of low vapor pressure. The behavior of µ exhibited in figure 2 is characteristic of many systems such as wool, silk, viscose (22), collagen, egg albumin, salmine, and also the cellulose nitrate-acetone system (16). In some cases one finds a tendency RELATIVE WATER VAPOR PRESSURE X Fig.…”

Section: Introductionmentioning

confidence: 96%

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Interaction of Polymers and Vapors.

Rowen¹,

Simha²

1949

J. Phys. Chem.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Interaction of Polymers and Vapors.

Rowen¹,

Simha²

1949

J. Phys. Chem.

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“…This does not include the aromatic derivative, phenyl acetate, a poorer solvent as indicated by its higher slope, but it does include benzyl acetate with its interposed CH2 group. Methyl, isopropyl, and butyl acetates are among the most highly sorbed of volatile solvents, x/'m, the sorption expressed in grams, exceeding unity for high relative pressures (5). The number of molecules taken up is greatest for methyl and least for butyl acetate.…”

Section: Viscosity In a Series Of Acetates As Solventsmentioning

confidence: 98%

The Viscosity of Nitrocotton in Various Solvents and Mixtures.

McBain¹,

Grant²,

Smith³

1934

J. Phys. Chem.

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A previous communication2 (6) presented a systematic report upon the apparent viscosity of solutions of nitrocotton (12.10 per cent nitrogen) in a large number of solvents and solvent mixtures over periods of time up to one year. Many interesting and significant regularities appeared, of which three may be mentioned. (1) The best solvents give the least viscous solutions with the same nitrocotton, the viscosity being referred to that of the solvent itself in each case. (2) Mixtures are better solvents than pure liquids. (3) The apparent viscosity is largely due to a structural effect,3 since it is altered by shaking, change of solvent, previous treatment, previous precipitation and recovery of the nitrocotton, and because of its enormous magnitude. All this is additional to any effect of the length of the molecule itself, so much stressed in subsequent years by Staudinger and others. The effects quoted above cannot reasonably be ascribed to alteration in the length of the molecule itself, more especially since changes occur in both directions.Many questions demanding further study arose, some of which are dealt with in the present report . EXPERIMENTAL METHODSThe nitrocotton "1919" has been described, together with the method of drying, storage, and preparation of the solutions (6). Units of weight, methane" should be "phenyl urethane" and "ortho tolyl methane" should be "benzyl phenyl urethane"; p. 330, table XI, the viscosity of pure ethyl phthalate (Nobel's; December, 1923) should be 0.04215 instead of 0.4215; p. 333, third line from the bottom, "less impure" should be "less pure."3 This was developed as a general explanation of the high viscosity of numerous colloids by J. W. McBain (J. Phys. Chem. 30, 239 (1926)).

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The non‐Fickian diffusion of deterrents into a nitrocellulose‐based propellant

Winkler¹,

Starks²

1988

J of Applied Polymer Sci

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SynopsisThe diffusion of solutions of ethyl centralite (EC), dibutylphthalate (DBP), an-. dinitrotoluene (DNT) into a nitrocellulose (NC) propellant is investigated. DBP and EC penetrate the propellant in a way consistent with Case I1 diffusion. The diffusion of DNT solutions is Fickian. The apparent activation energy for Case I1 diffusion is 62 kJ/mol for DBP and 66 kJ/mol for EC.Changes to coating solvent polarity have little effect on DNT and DBP penetration and merely alter the rate, not the mechanism, of EC diffusion into the propellant.

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The sorption of vapours by nitrocotton

Cited by 11 publications

References 0 publications

Interaction of Polymers and Vapors.

Interaction of Polymers and Vapors.

The Viscosity of Nitrocotton in Various Solvents and Mixtures.

The non‐Fickian diffusion of deterrents into a nitrocellulose‐based propellant

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