K. E. Chekurov, A. Barabanova, I. V. Blagodatskhikh, A. Peregudov, A. Khokhlov
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引用次数: 2
摘要
研究了2,3,4,5,6-五氟苯乙烯(PFS)和2-甲基丙烯酸羟乙酯(HEMA)在链转移剂4-氰基-4(苯基羰基硫代)戊酸存在下的自由基聚合反应。结果表明，PFS聚合是通过可逆加成-破碎链转移聚合机理进行的，而HEMA聚合的机理更为复杂。找到了制备不含PFS自由基聚合副产物的双嵌段共聚物(DBC)的条件。用含有37 mol. % PFSunits的DBC和聚2,3,4,5,6-五氟苯乙烯(PPFS)处理尼龙织物样品，比较了其与水(θ2)和二碘甲烷(θ2 I 2)的接触角。结果表明，DBC处理后的尼龙织物的θ2 О = 12530和θ2 I 2 = 10150比PPFS膜(θ Н 2 О = 10220 иθ2 I 2 = 7410)高。
Synthesis and Repellent Properties of Fluorinated Diblock-Copolymers
The radical polymerization of 2,3,4,5,6-pentafluorostyrene (PFS) and 2-hydroxyethyl methacrylate (HEMA) in the presence of chain transfer agent 4-cyano-4(phenylcarbonothioylthio)pentanoic acid was studied. It was shown that PFS polymerization proceeds through a reversible addition-fragmentation chain transfer polymerization mechanism, and that of HEMA polymerization is more complicated. The conditions of preparation of diblock copolymers (DBC) which do not contained the by-products of uncontrolled radical polymerization of PFS were found. Comparative study of contact angles versus water (θ2 ) and diiodomethane (θ2 I 2) of nylon fabric samples, treated with DBC containing 37 mol. % PFSunits, and poly-2,3,4,5,6-pentafluorostyrene (PPFS) was conducted. It is shown that the nylon fabric treated with DBC has higher θ2 О = 125 3o and θ2 I 2 = 1015o than PPFS films (θ Н 2 О = 102 2o иθ2 I 2 = 741o).
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