Composition dependence of nanophase‐separated structures formed by star‐shaped terpolymers of the A1.0B1.0CX type
Composition dependence of nanophase‐separated structures formed by star‐shaped terpolymers of the A1.0B1.0CX type
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DOI：
10.1002/polb.21241
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发表时间：
2007-08
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通讯作者：
A. Takano;W. Kawashima;S. Wada;K. Hayashida;S. Sato;S. Kawahara;Yoshinobu Isono;M. Makihara;N. Tanaka;D. Kawaguchi;Y. Matsushita
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作者：
A. Takano;W. Kawashima;S. Wada;K. Hayashida;S. Sato;S. Kawahara;Yoshinobu Isono;M. Makihara;N. Tanaka;D. Kawaguchi;Y. Matsushita
通过透射电子显微镜（TEM）和电子计算机断层扫描（3D-TEM）观察到了一系列ABC星形三元共聚物的分级纳米相分离结构。所合成的7种三元共聚物由聚异戊二烯（I）、聚苯乙烯（S）和聚（2-乙烯基吡啶）（P）组成，它们的体积分数比I：S：P为1：1：X，其中X分别等于0.2，0.4，0.7，1.2，1.9，3.0和4.9，并且通过将每两种母体三元共聚物共混来制备另外4种样品。从TEM和层析成像的形态观察，X = 0.2的样品显示界面处有球体的层状结构，X = 0.4至1.9的样品显示二维平铺的圆柱形结构，而X = 3.0和4.9的样品显示分层的层中柱结构。另外两个X为7.9和10的聚乙烯样品通过将P均聚物与聚乙烯I1.0S1.0P4.9共混而制备，并且它们都表现出在P基体中的柱状堆积盘状圆柱体。通过将本研究结果与蒙特-卡罗模拟的预测结果进行比较，证实了ISP星形三元共聚物的纳米相分离结构与预测结果基本一致。© 2007 Wiley Periodicals，Inc.聚合物科学杂志B部分：聚合物物理45：2277-2283，2007
Several hierarchical nanophase-separated structures have been observed for a series of ABC star-shaped terpolymers by transmission electron microscopy (TEM) and electron computerized tomography (3D-TEM). The seven terpolymers synthesized are composed of polyisoprene (I), polystyrene (S), and poly(2-vinylpyridine) (P), their volume fraction ratios of I:S:P are 1:1:X, where X equals 0.2, 0.4, 0.7, 1.2, 1.9, 3.0, and 4.9, respectively, and additional four samples were prepared by blending each two parent terpolymers. From morphological observation by TEM and tomography, a terpolymer with X of 0.2 shows lamellar structure with spheres at the interface, those with X ranging from 0.4 to 1.9 show cylindrical structures with two-dimensional tiling, while those with X of 3.0 and 4.9 show hierarchical cylinders-in-lamella structure. Two the other terpolymer samples with X of 7.9 and 10 were produced by blending a P homopolymer with the terpolymer I1.0S1.0P4.9, and they both exhibited columnar piled disk cylinders in P matrix. From the comparison of the present results with the predictions by the Monte–Carlo simulation, it was confirmed that the observed nanophase-separated structures of the ISP star-shaped terpolymers are mostly in good agreement with the prediction. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2277–2283, 2007