Abstract
Maleic anhydride (MAH) was grafted onto polypropylene (PP) film efficiently by means of introducing the electron donor monomer n-butyl vinyl ether (n-BVE), under UV irradiation. The principal factors affecting surface photografting polymerization such as irradiation time, molar ratio of MAH to BVE, monomer concentration, photoinitiators, UV and solvents, were investigated systematically. The results show that the photografting of MAH/BVE is an effective approach to modify the surface property of the polymeric materials, and the photografting process is very efficient. The contact angle of the grafted surface against water could decrease from 87 ° to less than 20 ° within 40 s of the irradiation time. The grafting efficiency would reach the highest when the molar ratio of MAH to BVE was 1:1, which indicated that the formation of charge transfer complex (CTC) between the binary monomers was favorable to the photografting polymerization. Among the photoinitiators benzildimethylketal (BDK), benzophenone (BP) and isopropylthioxanthone (ITX), the sequence of grafting efficiency was BP>ITX>BDK. Far UV (200–300 nm) radiation played a decisive role in the photografting polymerization and high UV intensity could accelerate this process. The solvent with good affinity towards the substrates was favorable to increase the grafting efficiency, because the diffusion of monomer and photoinitiator to the liquid-solid interface could be swimmingly. FT-IR spectra confirmed that both MAH and BVE had been successfully grafted onto PP film.
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Xing, CM., Deng, JP. & Yang, WT. Surface Photografting Polymerization of Binary Monomers Maleic Anhydride and n-Butyl Vinyl Ether on Polypropylene Film I. Effects of Principal Factors. Polym J 34, 801–808 (2002). https://doi.org/10.1295/polymj.34.801
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DOI: https://doi.org/10.1295/polymj.34.801
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