Ha Hongfei , Pan Yingdong , Wu Jilan , Yang Fuliang , Feng Xinde
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引用次数: 7
Abstract
The gamma radiation grafting of N-vinyl-2-pyrrolidone (N-VP) to segmented polyetherurethane (SPEU) was studied.
The grafting was performed by the preswelling technique. In this work the experiments of the polymer films preswollen in N-VP-aqueous solution with different acidity and basicity showed that the radiation grafting only occured in the basic medium.
The influence of temperature, swelling degree in the basic monomer aqueous solutions and irradiation time at constant dose rate on the grafting yield were investigated.
The swelling behavior of the modified films in water was followed. The penetration of the N-VP into the SPEU was studied by using absorption kinetics and its surface structure was observed by scanning electron microscope. The thrombo- resistance test of the film also has been performed. All the results showed that this grafting procedure was successful.
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