Preparation and Surface Properties Study of Novel Fluorine-Containing Methacrylate Polymers for Coating.
Preparation and Surface Properties Study of Novel Fluorine-Containing Methacrylate Polymers for Coating.
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DOI：
10.3390/ma11112258
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发表时间：
2018-11-13
期刊：
影响因子：
--
通讯作者：
Jiang B
中科院分区：
文献类型：
--
作者：
Zhang D;Xing P;Pan R;Lin X;Sha M;Jiang B
以全氟-2-甲基-2-戊烯(D2)为原料，合成了一种新型含氟甲基丙烯酸酯单体CH2=C(CH3)COOC-(CF3)2CF2CF2CF3(5)。得到了5均聚物和不同链长(n=1，2，4，6，8，12，18)的5-甲基丙烯酸酯共聚物。这些新型含氟丙烯酸酯聚合物表现出优异的拒水拒油性能。均聚物和部分共聚物的膜接触角与CH2=CHC(O)OCH(C3F7)(Cf(CF3)2)制备的相应聚合物相似，但大于C6F13(CF3)CHOC(O)CH=CH2均聚物的接触角。结构-性能关系研究表明，随着烷基链长的增加，共聚物的疏水性先减小后增大。所有聚合物的Td均大于220C，Tg在−51~103.8℃的范围内波动，接触角和Tg可通过控制单体的投料比来调节，以满足实际应用中的技术指标要求。单体5具有优异的拒液性和热稳定性，是全氟长链含氟表面活性剂的理想替代品。
A new structural fluorine-containing methacrylate monomer CH2=C(CH3)COOC–(CF3)2CF2CF2CF3 (5) was synthesized derived from perfluoro-2-methyl-2-pentene (D2). A homopolymer of 5 and copolymers of 5 and methacrylate with different alkyl chain length (chain length n = 1, 2, 4, 6, 8, 12, 18) were obtained. These new fluorinated acrylate polymers showed excellent water and oil repellency. The contact angle of the films of the homopolymer and part of the copolymers were similar with the corresponding polymers prepared from CH2=CHC(O)OCH(C3F7)(CF(CF3)2), but greater than that of the C6F13(CF3)CHOC(O)CH=CH2 homopolymer. The structure-property relationship research indicated that the copolymers’ hydrophobicity decreased first and then increased with the increase of alkyl chain length. Td of all the polymers were greater than 220 °C and Tg fluctuated within the range of −51~103.8 °C. Contact angle and Tg could be adjusted by controlling the feed ratio of monomer to meet the requirements of technical indicators in the practical applications. The outstanding liquid repellency and thermal stability make monomer 5 a promising alternative to perfluorinated long-chain fluorosurfactants.
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