Complexes of Nitrocellulose with Cupric Chloride,
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1985
- Accession Number
- ADA162519
Entities
People
- E. Ahad