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Physical properties of natural and modified cotton cellulose grafted with acrylate monomers
Author(s) -
Varma D. S.,
Narasimhan Veena
Publication year - 1974
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1974.070181220
Subject(s) - materials science , birefringence , monomer , ultimate tensile strength , acrylate , grafting , natural fiber , synthetic fiber , composite material , polymer chemistry , cellulose , methyl acrylate , butyl acrylate , methacrylate , fiber , polymer , chemistry , organic chemistry , optics , physics
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 and 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 percent 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 at 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.