Covalently Linked Nanocomposites: Poly(methyl methacrylate) Brushes Grafted from Zirconium Phosphonate
Covalently Linked Nanocomposites: Poly(methyl methacrylate) Brushes Grafted from Zirconium Phosphonate
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DOI：
10.1021/cm0614517
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发表时间：
2006-09
影响因子：
8.6
通讯作者：
S. L. Burkett;N. Ko;N. Stern;Joseph A. Caissie;D. Sengupta
中科院分区：
文献类型：
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作者：
S. L. Burkett;N. Ko;N. Stern;Joseph A. Caissie;D. Sengupta
通过从膦酸锆粘土片层上的引发位点生长聚合物链，制备了完全共价连接的聚合物-粘土纳米复合材料。膦酸锆材料由约 1:3 比例的 4-氨基苄基膦酸酯和乙基膦酸酯基团 (Zr(AbPO3)x(EtPO3)2-x, x ≈ 0.5) 合成，在片层内呈“固溶”分布。将胺基转化为2-溴-2-甲基丙酰胺部分后，通过原子转移自由基聚合（ATRP）合成了膦酸锆和系链聚甲基丙烯酸甲酯（PMMA）刷的复合材料； Zr(Init-AbPO3)x(EtPO3)2-x 内的束缚引发剂及其可溶类似物是 ATRP 芳香酰胺基引发剂的第一个例子。为了促进复合材料的表征，故意没有针对高分子量聚合物优化聚合条件，但 PMMA 仍然在研究的条件下形成，并且 PMMA 的重量分数...
Fully covalently connected polymer−clay nanocomposites have been prepared by growing the polymer chains from initiator sites on the lamellae of a zirconium phosphonate clay. The zirconium phosphonate material was synthesized with an approximately 1:3 ratio of 4-aminobenzylphosphonate and ethylphosphonate groups (Zr(AbPO3)x(EtPO3)2-x, x ≈ 0.5) in a “solid solution” distribution within the lamellae. After conversion of the amine groups to 2-bromo-2-methylpropionamide moieties, composites of the zirconium phosphonate and tethered poly(methyl methacrylate) (PMMA) brushes were synthesized by atom transfer radical polymerization (ATRP); the tethered initiator within Zr(Init-AbPO3)x(EtPO3)2-x and its soluble analogue are the first examples of aromatic amide-based initiators for ATRP. To facilitate characterization of the composites, the polymerization conditions were intentionally not optimized for high molecular weight polymer, but PMMA was nonetheless formed at the conditions studied, and the weight fraction o...