Structural variations in the nitrocelluloses

Mathieu, M.

doi:10.1039/tf9332900122

Cited by 16 publications

(7 citation statements)

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“…In a series of investigations Mathieu (179,180) studied the variation in X-ray diffraction patterns from nitrocellulose as a function of nitration conditions, annealing temperatures, etc. In a series of investigations Mathieu (179,180) studied the variation in X-ray diffraction patterns from nitrocellulose as a function of nitration conditions, annealing temperatures, etc.…”

Section: B Cellulose Nitratementioning

confidence: 99%

Cellulose

Marchessault¹,

Sundararajan²

1983

The Polysaccharides

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Section: B Cellulose Nitratementioning

confidence: 99%

Cellulose

Marchessault¹,

Sundararajan²

1983

The Polysaccharides

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“…The nitration reaction is then performed using a mixture of nitric acid with oleum. The compound obtained, diethylene glycol dinitrate (11), is much less sensitive to shock than NG and its heat of explosion amounts to only 4480 J/g. Advantage is taken of this low heat of explosion in the manufacture of flashless and non-erosive low calorific smokeless DB propellants.…”

Section: Other Plasticizers Used In Double Base Propellantsmentioning

confidence: 97%

“…This leads to a better oxygen balance in the molecule. The heat of explosion and other explosive properties according to [11] [12] are shown in Table 2.…”

Section: Explosive Propertiesmentioning

confidence: 99%

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Propellant Chemistry

Folly¹,

Mäder²

2004

Chimia

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“…Trogus and Hess (26) showed that nitrocellulose fibres and fibres of other cellulose derivatives agree with cellulose in the fibre period, while the intermolecular distances are larger than in cellulose. Mathieu (10) showed that when from a nitrocellulose solution a film is formed by evaporation of the solvent, the molecules, which were entirely dispersed in the solution, rearrange themselves to a great extent, a crystal structure being formed again, whose x-ray pattern is very much like that of the fibre, though usually yielding not as sharp interferences as the former.…”

Section: The Mechanism Of the Membrane Potentials Of The Collodion Membranementioning

confidence: 99%

The Significance of the Structure of a Membrane for Its Selective Permeability

Wilbrandt

1935

Journal of General Physiology

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The attempt is made to reconcile the two existing theories on the mechanism of selective ion permeability of the cell membrane by taking into account the molecular arrangement in the substance of the membrane. It is shown that the pore theory and the solubility theory are not contradictory, but two aspects of the same problem, one from the thermodynamic point of view, the other from the point of view of molecular theory. The dried collodion membrane is used as a model in these studies. Its different behavior towards anions and cations is explained on the ground of a quasi-crystalline structure of collodion, the NO3-groups acting as dipoles with the negative charge directed towards the intermolecular spaces, no matter whether these pores are of molecular dimensions or larger. In this way a continuity in the behavior of the ordinary large pored collodion membrane and the dried membrane is established, both theoretically and experimentally. Experiments, with membranes of other cellulose derivatives agree with the mechanism suggested. Membranes of cellophane and ethyl cellulose are negatively charged, membranes of cellulose acetate positively. From solutions of collodion mixed with basic dyestuffs or alkaloids membranes can be obtained more permeable to anions than to cations in contrast to the ordinary collodion membrane. Membranes can be built which give high potential differences even between two identical electrolyte solutions. The asymmetry lies here within the membrane and is artificially produced by gluing together an ordinary collodion membrane with one previously impregnated with a basic dyestuff or an alkaloid.

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Structural variations in the nitrocelluloses

Cited by 16 publications

References 0 publications

Cellulose

Cellulose

Propellant Chemistry

The Significance of the Structure of a Membrane for Its Selective Permeability

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