Popis: |
The radiation-induced grafting copolymerization of HEMA to chloroprene rubber membranes were studied by means of irradiation of cobalt-60 gamma ray. The structure and surface morphology of both grafted and ungrafted CR membranes were observed by FT-IR-PAS spectroscopy and scanning electron microscope (SEM), respectively. The experimental results showed that the change of the degree of grafting in a mixed solvent of water and ethanol is S-shaped curve. The degree of grafting increases with increasing pH values in grafting solution. The influences of dose, dose rate, monomer concentration and grafting temperature were investigated. The degree of grafting does not change with increasing membrane thickness. This result showed that the grafting of HEMA to CR membrane is surface grafting. |