以PEDB(二硫代苯甲酸苯乙基酯)为链转移剂,进行AA(丙烯酸)、BA(丙烯酸丁酯)可逆加成-断裂链转移(RAFT)自由基聚合,得到数均相对分子质量可控、相对分子质量分布窄的聚合物P(AA-BA).以得到的聚合物为大分子RAFT自由基聚合剂,进行舍氟丙烯酸酯的扩链反应,制得稳定的含氟嵌段共聚物P(AA-BA)-b-PTFEA(甲基丙烯酸三氟乙酯)乳液.为了克服RAFT链转移剂在水中迁移慢的缺点,引入了自发相倒置的实验过程,即先进行AA、BA的本体聚合,然后在温和搅拌条件下滴加NaOH溶液,体系发生自发相倒置,产生稳定的亚微型聚合物颗粒,DLS测量乳液颗粒平均大小为4nm.乳液经TEM、DLS观测,粒径为50～60nm,颗粒分布均匀.
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