Noun:

வெடிப்பஞ்சு,

guncotton தமிழ் அர்த்தத்தின் உதாரணம்:

None

guncotton's Usage Examples:

The constitution of guncotton is a difficult matter to investigate, primarily on account of the very insoluble nature of cellulose itself, and also from the fact that comparatively slight variations in the concentration and temperature of the acids used produce considerable differences in the products.

Generally speaking, the lower the nitrogen content of a guncotton, as found by the nitrometer, the higher the percentage of matters soluble in a mixture of ether-alcohol.

, passing the evolved gases over some red-hot copper, and finally collecting them over a solution of potassium hydroxide which retains the carbon dioxide and allows the nitrogen, arising from the guncotton decomposition, to be measured.

Carefully prepared guncotton after washing with alcohol-ether until nothing more dissolves may require to be heated to 180-185° C.

Ordinary commercial guncottons, containing from 10 to 15% of lower nitrated products, will ignite as a rule some 20-25° lower.

Ordinary guncottons seldom contain more than 13% of nitrogen, and in most cases the amount does not exceed 12.

A small charge of dry guncotton will, however, detonate the wet material, and this peculiarity is made use of in the employment of guncotton for blasting purposes.

The gaseous mixture obtained by burning guncotton in a vacuum vessel contains steam, carbon monoxide, carbon dioxide, nitrogen, nitric oxide, and methane.

A characteristic difference between guncotton and collodion cotton is the insolubility of the former in ether or alcohol or a mixture of these liquids.

When quite dry guncotton is easily detonated by a blow on an anvil or hard surface.

Another heat test, that of Will, consists in heating a weighed quantity of the guncotton in a stream of carbon dioxide to 130° C.

Cellulose sulphates are one, and possibly the main, cause of instability in guncotton, and it is highly desirable that they should be completely hydrolysed and removed in the washing process.

The so-called collodion cottons are nitrated celluloses, but of a lower degree of nitration (as a rule) than guncotton.

Synonyms:

pyroxylin, nitrate, celluloid, blasting gelatin, cellulose nitrate, nitrocotton, cordite, nitrocellulose, pyrocellulose, pyroxyline, cellulose ester,

Antonyms:

natural,