In this study, we use self-consistent field theory to demonstrate that the A(BA′)_n miktoarm architecture can strongly deflect order–order phase boundaries to large volume fractions f_A. The A(BA′)_n architecture achieves this strong deflection by combining the effects of miktoarm frustration and block bidispersity and is shown to stabilize discrete spheres and cylinders of the A block up to values of f_A = 0.58 and f_A = 0.78, respectively. We next analyze the prevalence of chain bridging ν_B in both neat miktoarm melts and in homopolymer blends that form the fluctuation-stabilized “bricks and mortar” phase. These calculations demonstrate that high ν_B and f_A can both be simultaneously achieved with highly asymmetric miktoarm stars, a property especially useful for the design of tough thermoplastic elastomers. Finally, we show that these miktoarms exhibit large windows of phase space where the σ and A15 Frank–Kasper phases are stable.

中文翻译：

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A（BA'）_n Miktoarm星型聚合物的相界极端偏转和链桥

在这项研究中，我们采用自洽场理论来证明A（BA'）_ñ杂臂结构能够强烈打歪阶阶相界大体积分数˚F_一个。A（BA'）_n体系结构通过组合米克托臂挫折感和块双分散性实现了这种强大的挠度，并显示出可以稳定A块的离散球体和圆柱体，分别达到f _A = 0.58和f _A = 0.78的值。 。接下来，我们分析链的患病桥接ν_乙在纯净的miktoarm熔体和均聚物混合物中均形成稳定的“砖和灰浆”相。这些计算表明，高ν_乙和˚F_甲既可以与高度非对称杂臂分被同时实现，一个属性特别是对坚韧的热塑性弹性体的设计是有用的。最后，我们证明了这些微臂在σ和A15 Frank-Kasper相稳定的情况下显示出较大的相空间窗口。