No abstract

P(AN-co-VA-co-DEMA) terpolymers were synthesized by aqueous precipitation copolymerization of acrylonitrile (AN), vinyl acetate (VA), and 2-dimethylamino ethyl methacrylate (DEMA) with an Na 2 S 2 O 5 -NaClO 3 redox initiating system and fibers from these terpolymers were thus prepared by a wet spinning method. Functionalized multiwalled carbon nanotube (F-MWNT) networks were created on the surface of P(AN-co-VA-co-DEMA) fibers by a simple dipping method. The morphology and interfacial interactions of the obtained F-MWNTs-coated fibers were characterized by scanning electron microscope, Raman spectroscopy, and Fourier transform infrared spectroscopy. The results showed that F-MWNTs were assembled on the fibers and the density of F-MWNTs can be controlled by adjusting the F-MWNTs content in the dipping solution. The assembly process was driven by electrostatic interactions between the negative charges on the nanotube sidewalls and the positive charges of the fibers. The F-MWNTs-coated fibers had a good conductivity. The volume resistivity of the fibers coated with 1.18 wt % F-MWNTs reached 0.27 XÁcm, while the original mechanical properties were preserved.

Polyacrylonitrile copolymers containing amine groups (Poly(AN-VA-DEMA) copolymers) were synthesized by the aqueous precipitation copolymerization of acrylonitrile (AN), vinyl acetate (VA) and methacrylic acid 2-dimethylaminoethyl ester (DEMA) with a Na 2 S 2 O 5 -NaClO 3 redox initiating system. The influences of monomer concentration, temperature, pH value of the medium, initiator concentration and additive amount of DEMA on the yield and viscosity-average molecular weight (M η ) of the Poly(AN-VA-DEMA) copolymer were systemically investigated. The composition of Poly(AN-VA-DEMA) copolymer were characterized by FTIR and NMR.