Applications
Viscosity Chart

Suppose a viscosity equivalent to HL 25/45 is required. Since the dotted line crosses viscosity L35 at about 60% te required blend will be (60% HL 120/170 with 40% HX 30/50). Conversely, a blend of 75% HL 120/170 with 25% HX 30/50 will have a viscosity equivalent to L 60. Once the blend is established, the two grades are dissolved together in a given ratio. The solution is often smoother if the high viscosity nitrocellulose is dissolved first. Alternatively, solutions of known nitrocellulose content can be mixed in the appropriate proportions.

Viscosity Chart

Properties

Effect of Nitrogen Content on Nitrocellulose Properties
Property As % of Nitrogen Increases
Thermoplasticity Decreases As % of Nitrogen Increases
Solubility Decreases As % of Nitrogen Increases
Water Resistance Increases As % of Nitrogen Increases
Alcohol Solubility Decreases As % of Nitrogen Increases
Resin Comparability Increases As % of Nitrogen Increases
Hardness Increases As % of Nitrogen Increases
Aromatic & Aliphatic Solvent Tolerance Increases As % of Nitrogen Increases


Effect of Viscosity on Nitrocellulose Solution & Film Properties
Property As Viscosity Decreases
Flexibility & Elongation Decreases As % of Nitrogen Increases
Hardness Increases As % of Nitrogen Increases
Thermoplasticity Decreases As % of Nitrogen Increases
Solubility Increases As % of Nitrogen Increases
Solution Viscosoty Dereases As % of Nitrogen Increases
Solids at Equal Viscosity Increases As % of Nitrogen Increases
Tendency for Solution Discoloration Increases As % of Nitrogen Increases