The controlled release of antifoulant is critical in marine antifouling, which is profoundly influenced by the compatibility between polymer resin and antifoulant. Conjugation of polymers with active molecules provides a promising strategy to solve the problem. In this study, we report the synthesis of hyperbranched polymers containing antifouling main-chains and degradable branching points by using reversible addition-fragmentation chain-transfer (RAFT) polymerization. The copolymerization of butyl methacrylate, vinyl-functional Econea and divinyl-functional poly(ε-caprolactone) (PCL) yields a degradable hyperbranched antifouling polymer (DHAP). As revealed by ¹H NMR, the vinyl conversion linearly increases over reaction time during RAFT polymerization with a final conversion rate above 90 % after 24 h. The branching degree of DHAP increases with the content of PCL segment. Quartz crystal microbalance with dissipation (QCM-D) measurements show the degradation of DHAP is controlled. Antibacterial assays indicate that DHAP coating has good antibacterial activity. Thus, DHAP represents a promising system for antifouling coatings.

防污剂的控制释放在船舶防污中至关重要，这在很大程度上受到聚合物树脂和防污剂之间相容性的影响。聚合物与活性分子的结合提供了解决该问题的有前途的策略。在这项研究中，我们报告了通过使用可逆加成-断裂链转移（RAFT）聚合反应，合成包含防污主链和可降解分支点的超支化聚合物。甲基丙烯酸丁酯，乙烯基官能的Econea和二乙烯基官能的聚（ε-己内酯）（PCL）的共聚产生可降解的超支化防污聚合物（DHAP）。如^1所示1 H NMR，在RAFT聚合期间，乙烯基转化率随反应时间线性增加，24小时后最终转化率高于90％。DHAP的支化度随PCL片段的含量而增加。带有耗散的石英晶体微天平（QCM-D）测量表明DHAP的降解受到控制。抗菌测定表明DHAP涂层具有良好的抗菌活性。因此，DHAP代表了一种有前途的防污涂料体系。