Graft copolymerization of methyl acrylate onto nylon1010 initiated by potassium diperiodatonickelate(IV)

Abstract

ABSTRACT:In this article, the graft copolymerization of methyl acrylate (MA) onto nylon1010 by using potassium diperiodatonickelate(IV) [Ni(IV)]-nylon1010 redox system as initiator was studied in alkaline medium. The effect of different factors on grafting parameters was investigated. The structure of the graft copolymer was determined by infrared (IR), X-ray diffraction, and scanning electron microscope (SEM). It was found that Ni(IV)-nylon1010 system is an efficient redox initiator for this graft copolymerization. A single-electron transfer mechanism is proposed to explain the formation of radicals and the initiation. The graft copolymer was used as the compatibilizer in blends of poly(methyl methacrylate) (PMMA) and nylon1010. The SEM photographs indicate that the graft copolymer greatly improved the compatibility of the blend.

Graft Copolymerization of Methyl Methacrylate onto Casein Initiated by Potassium Ditelluratocuprate(III)

“…Compared with the initiating systems of diperiodatocuprate (III), [7,8] diperiodatoargentate(III), [9] and diperiodatonickelate(IV), [13,14] the conclusion shows the similar phenomenon. High levels of %P, %E, and %C have been obtained.…”

“…However, we found no matter how the condition of the reaction was changed, %E always remained stable and at a high value (.90%), which was better than the redox system initiated by diperiodatocuprate(III), [7,8] diperiodatoargentate(III), [9] and diperiodatonickelate (IV). [13,14] The DTC -casein system can be confirmed to be an efficient and staredox system for this graft copolymerization. Moreover, because the activation energy of the reaction employing DTC as an initiator is low, [20] the graft copolymerization is carried out at a room temperature of 208C and in an aqueous alkali medium, which is superior to other initiators.…”

Grafting of 4‐Vinyl Pyridine onto Nylon‐6 Initiated by Cu(III)

“…In recent years, we have obtained some achievements on the graft copolymerization of vinyl monomer initiated by supernormal valence transition metals, such as potassium diperiodatocuprate (III), diperiodatoargentate (III) and potassium diperiodatonickelate (IV) (6)(7)(8). It has also been demonstrated that DPC was an efficient initiator for grafting methyl acrylate (MA) or methyl methacrylate (MMA) onto nylon.…”

Graft copolymerization of styrene onto casein initiated by potassium diperiodatonickelate (IV) in alkaline medium

“…Recently more and more considerable attentions have been paid to the basic theoretical research and application on supernormal valence transitional metal, which can form a redox system with the characteristic reductive group on the natural or synthetic macromolecule to initiate the graft copolymerization of vinyl monomer onto macromolecule directly with high grafting efficiency. In our previous studies supernormal valence transitional metals, such as diperiodatonickelate(IV),6–9 diperiodatoargentate(III),10–12 and Diperiodatocuprate(III),13–15 have been applied to modify the macromolecular mainly with acrylate monomer, and some achievements have been obtained. On the basis of the experiments it has been demonstrated that Ni(IV) is an efficient and cheap initiator for the grafting.…”