Absorption of water by graft copolymers of cotton with methyl methacrylate using high-resolution NMR



Graft cotton fibers containing poly(methyl methacrylate) were initiated by ultraviolet radiation. High-resolution NMR was used to study the nature of water absorption by these graft copolymers and also by mixtures of cotton fibers with the corresponding homopolymers. Results obtained help in investigating the structure of the copolymers and to differentiate, in a simple way, between true graft copolymers and mechanical mixtures or coated fibers.