Papers by Keyword: Irradiation Grafting

Abstract: The acrylic acid was used as hydrophilic agent, the graft copolyreaction of acrylic acid and polypropylene was occurred under electron beam irradiation to modify the hydrophilicity of the polypropylene spunbonded nonwovens. The influenced of acrylic acid concentration and the irradiation dose to the hydrophilic properties were studied. The results show that for a constant irradiation dose, when the acrylic acid concentration is between 2 % and 10% , the grafting rate and the hydrophilic properties of the polypropylene spunbond nonwovens is first increased and then decreased , and reaches a maximum at the 8%. For a constant acrylic acid concentration, when the irradiation dose is between 10kGy and 50kGy, the grafting rate and the hydrophilic properties of the polypropylene spunbond nonwovens is also first increased and then decreased , and reaches a maximum at the 40kGy. The breaking strength increased with the increasing of the grafting rate, but decreased with the increasing of the irradiation dose

Abstract: In this paper, we took the co-irradiation technology, use the high-energy beam irradiate the polypropylene meltblown nonwovens which soaked with acrylic acid, so that the graft copolymerization reaction was occurred between the acrylic and the polypropylene, the influence of acrylic acid concentration and the irradiation dose to the hydrophilic properties and breaking strength were studied. The results shows that when the monomer concentration was between 2% and 8% and the irradiation dose was between 10kGy and 50 kGy, the hydrophilic properties increased with the increasing of the monomer concentration and irradiation dose. But the breaking strength wasn’t affected.

Abstract: Novel anion exchange membranes were synthesized by grafted copolymerization of 1-vinylimidazole onto pre-irradiated ethylene-tetrafluoroethylene copolymer (ETFE) film, followed by quaternization and alkalization. The structure of the membranes was studied by Fourier transform infrared (FT-IR). The physicochemical and electrochemical properties of the membranes were also characterized. The ionic conductivity of the synthesized membrane is 0.03 S/cm at 30°C. This result indicates that the membrane is suitable polymer electrolyte membrane and so may find potential applications in alkaline membrane fuel cells.