“…By carefully selecting the initiator systems, PCL functionalized with different end groups have been obtained, such as halogen groups [14,15], double bond [16][17][18], hydroxyl groups [19,20], and silane [21][22][23], which provides a wide range of possibilities for the synthesis of PCL-based copolymers with advanced structures such as block [24][25][26], star-shaped [27,28], comblike [29], brushlike [30], or cross-linked networks [31,32]. Meanwhile, ATRP has been proved to be efficient to synthesize polymer with desired macromolecular architectures [33][34][35][36].…”