Archimedean tiling structures from ABA/CD block copolymer blends having intermolecular association with hydrogen bonding
Archimedean tiling structures from ABA/CD block copolymer blends having intermolecular association with hydrogen bonding
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DOI：
10.1021/ma0524880
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发表时间：
2006-03-21
期刊：
影响因子：
5.5
通讯作者：
Matsushita, Y
中科院分区：
文献类型：
--
作者：
Asari, T;Arai, S;Matsushita, Y
研究了 ABA/CD 嵌段共聚物共混物的自组装相结构。使用一对聚异戊二烯和聚(2-乙烯基吡啶)的摩尔比为0.93:0.07的聚(2-乙烯基吡啶-嵌段-异戊二烯-嵌段-2-乙烯基吡啶)(PIP-91)和摩尔比为0.86:0.14的聚(苯乙烯-嵌段-4-羟基苯乙烯)(SH-91)作为样品。二组分聚合物。通过H-1核磁共振（NMR）分析证实，聚（2-乙烯基吡啶）和聚（4-羟基苯乙烯）通过氢键相互作用形成络合物。使用透射电子显微镜 (TEM) 进行的结构观察表明，PIP-91/SH-91 共混物形成具有 I、S 和 P/H 相的新型规则三相圆柱结构，第三个相由 P 链和 H 链形成分子间复合物。结构的横截面显示出规则多边形的周期性二维平铺图案，这一定是由于“桥接”PIP 链造成的。因此，新的介观阿基米德平铺图案，即(3(3),4(2))和(3.4.6.4)，已经从该混合系统形成。
Self-assembled phase structures of ABA/CD block copolymer blends were investigated. A pair of poly(2-vinylpyridine-block-isoprene-block-2-vinylpyridine) (PIP-91) whose molar ratio of polyisoprene and poly(2-vinylpyridine) is 0.93:0.07 and poly (styrene-block-4-hydroxystyrene) (SH-91) whose molar ratios is 0.86:0.14 were used as samples. Two component polymers. i.e., poly(2-vinylpyridine) and poly(4-hydroxystyrene), are confirmed to form complex via hydrogen-bonding interaction by H-1 nuclear magnetic resonance (NMR) analysis. Structural observation using transmission electron microscopy (TEM) reveals that PIP-91/SH-91 blends form new regular three-phase cylindrical structures having I, S, and P/H phases, the third one being conformed of intermolecular complex from P and H chains. The cross sections of the structures show periodic two-dimensional tiling patterns from regular polygons, which must be due to "bridged" PIP chains. Consequently, new mesoscopic Archimedean tiling patterns, that is, (3(3),4(2)) and (3.4.6.4), have been formed from this blend system.