PREPARATION AND CHARACTERISTICS OF CALCIUM SALT OF NYLON-ACRYLIC ACID GRAFT POLYMER
Abstract
The calcium salt of acrylic acid/nylon 6,6 graft polymer has been reported to show promise in flash-resistant fabrics. This report covers the initial phases of a systematic study of the preparation of the calcium form, and its characteristics in various aqueous solutions. The rate of sorption of calcium ion from solution was influenced primarily by changes in temperature, the desired value of 3.5 percent calcium being attained in 5 minutes at 100C, 9 minutes at 70C, and 64 minutes at 30C. A continuous process for calcium treatment is therefore possible. The effect of solution concentration on rate of calcium sorption was much less significant, and increases in solution concentration above 1 percent caused no change in rate. The amount of calcium sorbed at equilibrium at 30C was lower than 70 or 100C, suggesting a change in the character of the fiber at some intermediate temperature. The isotherm for calcium sorption was of the Langmuir type. Removal of the calcium was difficult with neutral detergents, but was readily accomplished with calcium complexing phosphates or with acid.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1966
- Accession Number
- AD0665625
Entities
People
- Basil A. Natsios
- Edward M. Healy
Organizations
- United States Army Soldier Systems Center