UV‐radiation‐induced preirradiation graft copolymerization of methacrylic acid and acrylic acid onto jute fibre

Abstract

UV-radiation-induced graft copolymerization of methacrylic acid and acrylic acid onto jute fibre was carried out using a preirradiation method with 1-hydroxycyclohexyl-phenylketone as a photoinitiator. 2-methyl-2-propene 1-sulfonic acid, sodium salt was incorporated into the grafting solution in suppressing the homopolymer/gel formation and facilitating graft copolymerization. In comparison, results showed that the type of monomer significantly influence on grafting. The results of the characterisation showed that the graft weight and the type of monomer have significant influence on the mechanical and water absorption properties in the case of grafted samples.

γ-Radiation Induced Changes in the Physical and Chemical Properties of Lignocellulose

“…In lignocellolose material, the lignin is a structurally intricate aromatic polymer with oxygenated phenyl propane units, which is situated as filler between the highly ordered cellulose microfibrills. Upon exposure to γ-rays, the phenoxy radicals are most likely to produce and cause degradation on lignocellulose molecules . When cellulose molecules are exposed to γ-rays, the radicals are produced in the cellulose chains as discussed before.…”

“…The cellulose is a linear polymer of cellobiose repeating unit, and the degree of polymerization is normally 10 to 100 times greater than that of hemicelluloses. The lignin and hemicellulose molecules are linked through ester linkages formed by the carboxyl groups in the lignin . This linkage governs the physical properties of jute fibers.…”

Effects of environmental exposure on tribological properties of Arhar particulate/epoxy composites

“…Natural fibers are classified into different types based on their source of extraction, composition and contents, form of availability etc. Some of natural fibers that are used in the past studies are sisal , kenaf , bamboo , jute , and wool .…”