A total of 1/2/4/6-armed molecular architectured polyhedral oligomeric silsesquioxane (POSS) fluoropolymers were synthesized via atom transfer radical polymerization (ATRP) by linear (L), dicephalus (D), four-arm (T), and six-arm (S) initiators initiating same content of methyl methacrylate (MMA), methacrylate POSS (MA-POSS), and dodecafluoroheptyl methacrylate (DFHM). The obtained L/D/T/S-(PMMA-b-PMAPOSS-b-PDFHM)1/2/4/6 had increased molecular weight with arm increase. Driven by the stereo-hindrance and curvature effects of segments in tetrahydrofuran (THF), they assembled into the decreased spherical core-shell micelles (250–100 nm) with arm increase as PMA-POSS/PDFHM core and PMMA shell. Because of easy surface migration of fluorine-containing groups in small micelles, the casted film by S-(PMMA-b-PMAPOSS-b-PDFHM)6 performed the fluorine-rich (46.44%) and rough (5.41 nm) surface, and therefore with the hydrophobic (112°) and low water adsorption surface (1522 ng/cm2). Also, POSS-fluoropolymers obtained the enhanced thermostability with arm increase. It is believed that this research will provide a bright view for design and application of POSS-fluoropolymers. Graphical abstract Graphical abstract

中文翻译：

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不同分子结构的POSS-氟聚合物对其自组装疏水涂层的影响

共 1/2/4/6 臂分子结构多面体低聚倍半硅氧烷 (POSS) 含氟聚合物是通过原子转移自由基聚合 (ATRP) 由线性 (L)、双头 (D)、四臂 (T) 和六臂 (S) 引发剂引发相同含量的甲基丙烯酸甲酯 (MMA)、甲基丙烯酸酯 POSS (MA-POSS) 和甲基丙烯酸十二氟庚酯 (DFHM)。得到的L/D/T/S-(PMMA-b-PMAPOSS-b-PDFHM)1/2/4/6随着臂的增加而增加了分子量。在四氢呋喃 (THF) 中片段的立体位阻和曲率效应的驱动下，它们组装成减小的球形核壳胶束（250-100 nm），臂增加为 PMA-POSS/PDFHM 核和 PMMA 壳。由于含氟基团在小胶束中易于表面迁移，S-(PMMA-b-PMAPOSS-b-PDFHM)6 的流延膜具有富氟 (46.44%) 和粗糙 (5.41 nm) 表面，因此具有疏水 (112°) 和低吸水表面 ( 1522 纳克/平方厘米）。此外，POSS-氟聚合物随着臂的增加获得了增强的热稳定性。相信这项研究将为POSS-含氟聚合物的设计和应用提供一个光明的前景。图形摘要图形摘要