Graft copolymerization reaction of water-emulsified methyl methacrylate with preirradiated jute fiber

Abstract

ABSTRACT:The graft copolymerization of methyl methacrylate with water-emulsified solution onto preirradiated jute fiber was studied. The jute samples were irradiated in the presence of air using a 60 Co source of gamma-radiation. A nonionic surfactant, commercially known as ''Scintron (Triton X-114),'' was used as an emulsifier. Homopolymerization was reduced by using 2-methyl-2-propene-1-sulfonic acid, sodium salt. The graft copolymerization was found to be dependent on the emulsifier concentration, radiation dose, temperature, monomer concentration, and reaction time. Maximum grafting level was achieved at temperatures in the range of 70-80ЊC, and the optimal reaction time for maximum grafting level was found to be between 3 and 5 h, depending on the radiation doses.

Preparation and characterization of a strong basic anion exchanger by radiation-induced grafting of styrene onto poly(tetrafluoroethylene) fiber

“…The peroxide species are produced only when fibers are irradiated in the presence of oxygen [25,28]. Fig.…”

“…The preirradiation method causes little homopolymerization reaction [27], and requires a relatively simple postgrafting process. Furthermore, the grafting can be carried out away from the irradiation sources at any time and can be operated continuously in industry [28]. In this research, a preirradiation grafting method was used to graft styrene monomer onto PTFE fiber for preparing an ionexchange fiber, which could be used for purification of corrosive solvent in the electronic industry.…”

γ‐Radiation‐Induced Graft Copolymerization of Ethyl Acrylate onto Hydroxypropyl Methylcellulose

“…Khan and Ahmad reported4 that in the presence of oxygen, the γ ‐radiation‐induced radicals in the cellulosic material produce cellulose diperoxides (CellOOCell) and hydroperoxides (CellOOH) species by a radical chain reaction process. This reaction proceeds in three steps as follows: Activation: where Cell is the HPMC cellulose substrate and ${\rm Cell}^ \bullet $ corresponds to all possible radical formations.…”

“…In addition, when HPMC is subjected to 60 Co γ radiation, radicals are produced onto the HPMC backbone by three modes 4. First, radicals can be formed by hydrogen abstraction and hydroxyl abstraction, as explained in Scheme .…”

“…Therefore, the reactive species are confined in the substrate. This technique has some advantages over the simultaneous irradiation method, such as the formation of less homopolymer and increased depth of penetration 4…”