Accession Number:

ADA162519

Title:

Complexes of Nitrocellulose with Cupric Chloride,

Descriptive Note:

Corporate Author:

DEFENCE RESEARCH ESTABLISHMENT VALCARTIER (QUEBEC)

Personal Author(s):

Report Date:

1985-11-01

Pagination or Media Count:

27.0

Abstract:

The cupric chloride CC effect on the viscosity of nitrocellulose NC in an acetone solution was studied for various military and commercial type NC samples obtained from different suppliers. The NC samples were produced from wood cotton cellulose with a nitrogen content between 11.0 and 13.5 and a molecular weight ranging from 20,000 to 800,000. The study was carried out using different NC and CC concentrations and at different shear rates. The addition of CC to the NC solution causes an increase of the viscosity as a function of time due to the complex formation between NC and CC which is accomplished in two stages, each with a specific rate constant. The variation of the viscosity with the shear rate followed a pseudoplastic non-Newtonian behaviour. An empirical factor, the Cupric Chloride Parameter CCP, is computer from the intrinsic viscosity of the polymer as weight fraction of CC relative to NC, X, determined at the saturation point. The CCP is characgteristic of the NC sample and cna be related to the cellulose source wood or cotton and nitrogen content. The value of the square root of X can be used as a parameter ot elucidate structural differences among NC samples. Author

Subject Categories:

  • Polymer Chemistry
  • Plastics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE