پديد آورندگان :
Liu Yinghai نويسنده , LI YANXIAN نويسنده , Yang Lanying نويسنده , Liu Yuanwei نويسنده , Bai Libin نويسنده
چكيده لاتين :
Anovel redox system, potassium diperiodatocuprate(llI) (OPC) sodium alginate
(SA), was employed to initiate the graft copolymerization of methyl acrylate (MA)
onto SA in alkali medium. The effects of reaction variables, such as the initiator
concentration, the ratio of monomer to SA, the SA backbone concentration, as well as
temperature and time, were investigated, and the grafting conditions were optimized.
Graft copolymers with both high grafting efficiency and high percentage of grafting were
obtained, indicating that OPC SA redox system is an efficient initiator for this graft copolymerization.
The structures and the thermal stability of SA and SA-g-PMA were characterized
by scanning electron microscope, infrared spectroscopy and thermogravimetric
analysis. A mechanism is proposed to explain the generation of radicals and the initiation.
