Wang Pu-Cheng, Lu Dan, Wang Hu, Bai Ru-Ke
Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China.
CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
Polymers (Basel). 2019 Sep 2;11(9):1440. doi: 10.3390/polym11091440.
An alternating fluorinated copolymer based on chlorotrifluoroethylene (CTFE) and butyl vinyl ether (BVE) was synthesized by RAFT/MADIX living/controlled polymerization in the presence of S-benzyl O-ethyl dithiocarbonate (BEDTC). Then, using the obtained poly(CTFE-alt-BVE) as a macro chain transfer agent (macro-CTA), a block copolymer was prepared by chain extension polymerization of vinyl acetate (VAc). After a basic methanolysis process, the poly(vinyl acetate) (PVAc) block was transferred into poly(vinyl alcohol) (PVA). Finally, a novel fluorinated polyurethane with good surface properties due to the mobility of the flexible fluorinated polymer chains linked to the network was obtained via reaction of the copolymer bearing the blocks of PVA with isophorone diisocyanate (IPDI) as a cross-linking agent.
在S-苄基O-乙基二硫代碳酸酯（BEDTC）存在下，通过可逆加成-断裂链转移/金属催化的活性/可控自由基聚合（RAFT/MADIX）合成了一种基于三氟氯乙烯（CTFE）和乙烯基丁基醚（BVE）的交替氟化共聚物。然后，以所得的聚（CTFE-alt-BVE）作为大分子链转移剂（macro-CTA），通过醋酸乙烯酯（VAc）的扩链聚合制备了嵌段共聚物。经过碱性甲醇解过程后，聚醋酸乙烯酯（PVAc）嵌段转化为聚乙烯醇（PVA）。最后，通过使带有PVA嵌段的共聚物与作为交联剂的异佛尔酮二异氰酸酯（IPDI）反应，获得了一种新型氟化聚氨酯，由于连接到网络的柔性氟化聚合物链具有流动性，该聚氨酯具有良好的表面性能。
