Physical properties of natural and modified cotton cellulose grafted with acrylate monomers

✍ Scribed by D. S. Varma; Veena Narasimhan

• Publisher: John Wiley and Sons
• Year: 1974
• Tongue: English
• Weight: 559 KB
• Volume: 18
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1974.070181220

✦ Synopsis

Natural, cyanoethylated, and formaldehyde-crosslinked cotton cellulose has been grafted with methyl, ethyl, and n-butyl acrylate and methyl methacrylate monomers. Various physical properties such as density, moisture regain, birefringence, and mechanical properties were studied. The results indicate that the density end moisture regain of the grafted fibers are less than those of natural cotton. The birefringence of grafted fibers is also less than that of natural cotton. The variation in birefringence with per cent graft-on depends on the monomer. Parameters such as orientation factor, helix angle, and refractive power of fibers were calculated from the birefringence data and the results discussed. It was observed that due to grafting of both natural and crosslinked cotton, there is a decrease in tensile strength, increase in elongation a t break, and decrease in the initial modulus. Attempts are made to understand these changes in the properties of cotton in terms of the changes occurring in the fine structure of the fiber.