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通过可逆加成-裂解链转移聚合和原子转移自由基聚合,制备了以聚丙烯酸叔丁酯为主链、以聚（聚乙二醇单甲醚甲基丙烯酸酯）为侧链的两亲性接枝共聚物PtBA-g-PPEGMEMA,该方法克服了以往通过聚合物修饰来引入接枝点时所存在的接枝点密度不高和不可控的局限性.接着,以PtBA-g-PPEGMEMA为载体,对抗肿瘤药物阿霉素进行了负载,制备得到了尺寸为164.8 nm的纳米载药胶束.其释放试验表明,该体系具有缓释特征.“,”PtBA-g-PPEGMEMA amphiphilic graft copolymer,consisting of poly（tert-butylacrylate） back-bone and poly（poly（ethylene glycol）methyl ether methacrylate） side chains,was synthesized by the combi-nation of reversible addition-fragmentation chain transfer（RAFT） polymerization and atom transfer radical polymerization（ATRP）.The limitation of low and uncontrolled grafting density while introducing the graft-ing points onto the polymer backbone by polymer post-modification can be overcome by this strategy.The anti-cancer drug,doxorubicin（DOX）,was loaded using PtBA-g-PPEGMEMA as the carrier to get a DOX-loaded micelle-based nano-carrier with a Dh around 164.8 nm.Drug release experiment of the nano-carrier indicated the delayed drug release characteristics.