NOPR Collection:

Graft copolymerization of ethyl methacrylate onto polyvinyl alcohol using ceric ion initiator

Tue, 01 Sep 1998 00:00:00 GMT

Title: Graft copolymerization of ethyl methacrylate onto polyvinyl alcohol using ceric ion initiator Authors: Chowdhury, P Abstract: The effect of reaction conditions on grafting parameters during the grafting of ethyl methacrylate (EMA) onto polyvinyl alcohol (PVA) using ceric ammonium sulfate (CAS) initiator has been studied. The grafting efficiency (GE) was found to be optimum at a particular level of EMA, CAS, PVA, H₂SO₄, temperature and time. Acid hydrolysis and infrared spectroscopy (IR) were used for the confirmation of graft copolymer formation. The X-ray diffraction (XRD) pattern and thermogravimetric analysis (TGA) of PVA and a representative graft copolymer were studied. The plausible mechanism of grafting has been suggested. Page(s): 346-350

Utility of some new multifunctional additives to Egyptian gasoline

Tue, 01 Sep 1998 00:00:00 GMT

Title: Utility of some new multifunctional additives to Egyptian gasoline Authors: Hassan, H M Abstract: Arylazoacetylacetones, arylazoacetamides and arylazomalonates have been used as multifunction additives for Egyptian gasoline. Treating these azodye derivatives with phenyl hydrazine, hydrazine hydrate and hydroxylamine give heterocyclic derivatives which have also been examined as additives. Page(s): 343-345

Dry synthesis of 'Biginelli' compounds using inorganic solid support coupled with microwave irradiation : An environmentally co-friendly synthesis

Tue, 01 Sep 1998 00:00:00 GMT

Title: Dry synthesis of 'Biginelli' compounds using inorganic solid support coupled with microwave irradiation : An environmentally co-friendly synthesis Authors: Gupta, Rajive; Paul, Satya; Gupta, Avinash K Abstract: A simple and high yielding environmentally co-friendly method has been developed for the synthesis of 'Biginelli' compounds as potent mimics of DHP's in dry conditions using inorganic solid supports coupled with microwave irradiation. Specific non-thermal effect of the microwave irradiation has been observed. Page(s): 340-342

Regeneration and recycling of waste Fe(III)/Cr(III) hydroxide for the continuous adsorption of Ni(II) and Cr(VI)

Tue, 01 Sep 1998 00:00:00 GMT

Title: Regeneration and recycling of waste Fe(III)/Cr(III) hydroxide for the continuous adsorption of Ni(II) and Cr(VI) Authors: Namasivayam, C; Ranganathan, K Abstract: The waste Fe (III)/Cr (III) hydroxide is recycled after alternating adsorption and desorption of Ni (II) and Cr (VI). Six regeneration cycles have been observed without any significant loss in metal removal efficiency of the adsorbent. Page(s): 337-339