Radiation synthesis, characterization and amidoximation of N-vinyl-2-pyrrolidone/acrylonitrile interpenetrating polymer networks

Synthesis of amidoximated polyacrylonitrile fibers and its application for sorption of aqueous uranyl ions under continuous flow

“…For the amidoximation reaction, a recipe given in the literature was followed [30]. Hydroxylamine hydrochloride (0.375 g), sodium hydroxide (0.375 g), and 25.0 mg of PAN nanofiber mats were added to a 50 mL beaker and continuously stirred for 2 days at room temperature.…”

Chemical modification of polypropylene fibers grafted vinyl imidazole/acrylonitrile copolymer prepared by gamma radiation and its possible use for the removal of some heavy metal ions

“…The decrement in the thermal stability of the grafted fibers by the increase in the AN content is a direct result for the low stability of PAN which start to decompose at 2858C. 25 The absence of a sharp degradation in the derivative thermogram at 2858C indicates that AN moieties in the copolymer structure are not present in blocks or in segments and rather distributed randomly on the main chain. Figure 8 shows the TGA thermogram of PP-g-P(VIm/AN) fibers treated with 4-amino pyridine, anthranilic acid, and glycyl-L-leucine.…”

Effect of Surfactant on Magnetic and Optical Properties of α-Fe2O_3Nanoparticles

“…Dominant bands in coated sample at about 462 and 540 cm −1 are characteristics of crystalline α-Fe 2 O 3 [28] (see Table III and Fig. 3c), whereas the remaining absorptions can be assigned to pure PVP [29,30]. This additive eect in absorptions is a clear indication of the presence of PVP in our coated sample.…”

“…-OH stretching * [29] sion spectra of uncoated hematite nanoparticles, pure PVP and PVP coated hematite nanoparticles, respectively. Corresponding assignments λ of the absorption bands in the spectra are listed below in Tables I, II, Table I and Fig.…”