Graft copolymerization and characterization of 2‐hydroxyethyl methacrylate onto jute fiber by photoirradiation

Abstract

UV radiation induced graft copolymerization of 2-hydroxyethyl methacrylate onto natural lignocellulose (jute) fiber was carried out by two methods: simultaneous irradiation and grafting and preirradiation grafting. 1-Hydroxycyclohexyl-phenylketone was used as the photoinitiator in both methods. In the former method, the variation of the graft weight was measured for different values of radiation exposure time and the concentrations of both the monomer and photoinitiator. The latter method produced up to 76% graft weight compared to 45% obtained with the former method. The preirradiation method offers better control of the homopolymerization reaction compared to that afforded by the other method. The optimum value of the reaction parameters on the graft weight was evaluated. The mechanical properties of grafted samples were found to be drastically different from those of the as-received ones and the effect was proportional to the percentage of graft weight. Differential scanning calorimetry studies showed that the percentage of graft add-on of hydroxyethyl methacrylate with jute had a significant effect on the thermal properties. IR studies indicated the degree of grafting could be estimated by correlating the band intensities with the graft weight. The jute samples grafted with poly(hydroxyethyl methacrylate) at a level of 12% graft weight exhibited a maximum 20% increase in hydrophilicity.

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

“…However, the inevitable and uncontrollable homopolymer formation is still too high [25], which reduces the grafting efficiency, requires a complex postgrafting process, and generates a large amount of raw material waste. An alternative to the simultaneous irradiation and grafting method is the preirradiation method [26]. The preirradiation method causes little homopolymerization reaction [27], and requires a relatively simple postgrafting process.…”

Re-Emerging Field of Lignocellulosic Fiber – Polymer Composites and Ionizing Radiation Technology in their Formulation

“…Radiation-assisted grafting, which generates surface functionality on the fibers tailored to encourage chemical bonding and crosslinking at the polymer interface, may utilize UV light, 105,108,111,[115][116][117]141 electron beam, 122 gamma rays, 102,139,140,142,143 and even microwave radiation. 144 Nonionizing UV light and microwave radiation, owing to their comparatively lower energies, are not as effective as ionizing radiation.…”

UV light-induced grafting of fluorinated monomer onto cellulose sheets

“…Earlier studies onto photo-induced grafting onto cellulose have already shown its feasibility (Mohanty and Singh 1988), but most of them deal with cotton and jute, grafting common acrylic monomers such as methyl methacrylate or 2-hydroxyethyl methacrylate monomer, in order to improve tensile strength (Khan et al 2004a, b;Khan and Ahmad 2006;Ghosh and Paul 1983;Kubota and Kuwabara 1997;Shukla and Athalye 1995;Shukla and Athalye 1993;Rahman 2009). Similar structures were also used for paper conservation purposes (Margutti et al 2001;Princi et al 2005).…”