A facile and efficient synthetic grafting-through strategy for preparing well-defined bottlebrush block copolymers (BBCPs) was developed through a combination of living anionic polymerization (LAP) and ring-opening metathesis polymerization (ROMP). ω-End-norbornyl polystyrene (NPSt) and poly(4-tert-butoxystyrene) (NPtBOS) were synthesized by LAP using terminator of chlorine moiety containing silane-protecting amine and coupled with a subsequent amidation using norbornyl activated ester. Bottlebrush homopolymers of NPSt were obtained by ROMP with ultrahigh molecular weights (MWs, M_w = 2928 kDa) and narrow molecular weight distributions (MWDs, Đ = 1.07) at high degree of polymerizations (DP_w = 1084). Well-defined BBCPs with ultrahigh MWs (M_w ∼ 3055 kDa) and narrow MWDs (Đ ∼ 1.13) were synthesized through sequential ROMP of NPSt with NPtBOS. The effect of ultrahigh MWs was investigated by self-assembly of the BBCPs in which the phase-separated BBCPs presented periodic lamellar structures and exhibited structural colors from blue to pink.

中文翻译：

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通过活性阴离子聚合和开环易位聚合从ω-端-降冰片基聚苯乙烯和聚（4-叔丁氧基苯乙烯）精确合成瓶刷嵌段共聚物

通过活性阴离子聚合（LAP）和开环复分解聚合（ROMP）的组合，开发了一种简便有效的合成接枝直通策略，用于制备定义明确的牙刷嵌段共聚物（BBCP）。ω-末端降冰片基聚苯乙烯（NPSt）和聚（4-叔丁氧基苯乙烯）（NP t BOS）是通过LAP使用含硅烷保护胺的氯部分的终止剂合成的，并随后使用降冰片基活化的酯进行酰胺化。通过ROMP在高聚合度（DP _w下）获得的超高分子量（MWs，M _w = 2928 kDa）和窄分子量分布（MWDs，Đ = 1.07）的NPSt瓶刷均聚物= 1084）。与超高兆瓦良好定义BBCPs（中号_瓦特〜3055 kDa）的和窄的MWD（Đ〜1.13）中通过与NP NPST的顺序ROMP合成吨BOS。通过BBCPs的自组装研究了超高分子量MWs的影响，其中相分离的BBCPs表现出周期性的层状结构，并呈现出从蓝色到粉红色的结构颜色。