Bottle-brush polymers possessing densely grafted side chains have special properties that are distinct from linear macromolecules. Herein, an efficient method for preparing bottle-brush polymers based on a selective photoactivation strategy in the photoinduced electron/energy transfer reversible addition-fragmentation chain transfer (PET-RAFT) polymerization was developed. A methacrylate monomer 2-(2-(dodecylthiocarbonothioylthio)propionate)ethyl methacrylate (DTPEMA) containing a 2-(dodecylthiocarbonothioylthio)propionate (DTP) unit with a secondary R group was designed. Utilizing the unique selectivity of metal naphthalocyanine photocatalyst zinc 2,11,20,29-tetra-tert-butyl-2,3-naphthalocyanine (ZnTtBNc) toward trithiocarbonate with tertiary R group, the PET-RAFT polymerization of DTPEMA catalyzed by ZnTtBNc was performed under near infrared (NIR) light (λ_max = 760 nm) irradiation at room temperature, using 4-cyano-4-[(dodecylsulfanylthiocarbonyl)-sulfanyl] pentanoic acid (CDTPA) with a tertiary R group as a chain transfer agent (CTA). Proton nuclear magnetic resonance (¹H NMR) and gel permeation chromatography (GPC) results demonstrated that the DTP units in the side chains were inert during the polymerization. By grafting poly(methyl acrylate) (PMA) from PDTPEMA via thermal-initiated RAFT polymerization, well-defined P(DTPEMA-g-PMA) bottle-brush polymers could be afforded. Furthermore, the film prepared from the bottle-brush polymer exhibited excellent scratch self-healing property due to the interlocking of side chains.

具有密集接枝侧链的瓶刷聚合物具有不同于线性大分子的特殊性能。在此，开发了一种基于光诱导电子/能量转移可逆加成断裂链转移（PET-RAFT）聚合中选择性光活化策略制备瓶刷聚合物的有效方法。设计了含有带有仲R基团的2-(十二烷基硫代碳硫酰硫基)丙酸酯(DTP)单元的甲基丙烯酸酯单体2-(2-(十二烷基硫代碳硫酰硫基)丙酸酯)甲基丙烯酸乙酯(DTPEMA)。利用金属萘酞菁光催化剂锌2,11,20,29-四叔丁基-2,3-萘酞菁(ZnTtBNc)对带有叔R基团的三硫代碳酸酯的独特选择性，进行了ZnTtBNc催化的DTPEMA的PET-RAFT聚合室温下，在近红外（NIR）光（λ _max = 760 nm）照射下，使用带有叔R基团的4-cyano-4-[(十二烷基硫烷基硫代羰基)-硫烷基]戊酸(CDTPA)作为链转移剂（CTA）。质子核磁共振( ¹ H NMR)和凝胶渗透色谱(GPC)结果表明侧链中的DTP单元在聚合过程中是惰性的。通过热引发 RAFT 聚合从 PDTPEMA 接枝聚丙烯酸甲酯 (PMA)，可以得到结构明确的 P(DTPEMA-g-PMA) 瓶刷聚合物。此外，由于侧链的互锁，由瓶刷聚合物制备的薄膜表现出优异的划痕自修复性能。