| Studies on chemical modification for polypropylene materials are very active in recent years, in which grafting treatment with plasma is quite valid.We treated PP fiber, BOPP film and PP cloth with two ways: with Nitrogen (N2), Hydrogen (H2) and Oxygen (O2) plasma respectively, and with acrylic acid (AA) grafting introduced by plasma N2, H2 and O2 respectively. Then tested and analyzed several physical and the chemical properties about the structure and properties of PP material before and after the treatment. Then, we dyed samples and tested the permanence of dye.According to the tests, we have the results as the followings:First, the basic mechanics function of PP material haven't been damaged, contact angle of PP surface was reduced, the interface splitting intensity of PP fibers in the IFSS value were increased, the characteristic peak of the live bond—NH2,—C=O appeared in the FTIR figures, the appearance of PP surface changed roughly, or cave in and convexly. The dyeing rates of PP fiber have risen.Second, Methylene blue, alkaline rose red and alkaline purple dyestuffs were used to dye PP fiber. The color of sample of dyeing the dyestuff was sufficiently and uniform; its permanence of dye in remit of wash fastness, remit of climate, remit of change residence fastness and remit of light fastness are more better than before when assessing the color grade of change in color and staining.Third, through analyzing results of plasma treatment, we got the best parameters of plasma: Time of discharge was 6 min, Pressure of plasma was 40 Pa, and Power of discharge was 90 W.This thesis has taken the results through the sufficiently experiments and tests: grafting treatment with plasma was a useful method to modify PP fiber, and the dyestuff molecules can been adsorbed or connected on PP fiber surface through the covalence bonds, and the samples got fresh color after dyeing and the permanence of dye was better also.
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