摘要：

A series of fluorinecontaining diblock copolymers based on lauryl methacrylate and 1H,1H,2H,2Hperfluoroalkyl acrylate have been prepared by atom transfer radical polymerization (ATRP). The preparation process of PLMABr macroinitiators was controlled within a reasonable time corresponding to the ln [M0]/[Mt]time plot of the reaction. FTIR, 1HNMR, GPC and fluorineelement analysis (FEA) were used to characterize the synthesized block copolymers. The solid surface activity of these polymers was demonstrated by contact angle measurement. The polymer films prepared by block copolymers with more than three fluorinated units showed low dispersion force contributions to the surface energy indicating the presence of the fluorinated block at the surface. The surface activity in solutions was measured by dropweight method. Ii is interesting to find, when the fluorine weight percentage is controlled constant, that PLMAbPFAEA with larger molecular size is more prominent in exploiting the fluorinated structure to reduce the surface tension of solutions. The block copolymer''s ability in reducing surface tension of solutions also depends on the type of solvent.

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