A methodology for synthesizing a wide range of dumbbell‐shaped, graft and bottlebrush polymers with all‐siloxane nature (without carbosilane linkers) is suggested. These macroarchitectures are synthesized from SiOH‐containing compounds—silanol (Et₃SiOH) and siloxanol dendrons of the first and second generations, with various peripheral substituents (Me or Et)—and from linear siloxanes comprising terminal and internal SiH groups by the Piers–Rubinsztajn reaction. Products and key building blocks are obtained in yields up to 95%. These polymers are heat and frost‐resistant siloxanes. As it turns out, the product physical properties are determined not only by the macromolecular structure, the linear chain length, the size and frequency of branched pendant, but also by the type of peripheral substituents—Me or Et—in the pendant. Thus, the viscosity of the graft polymers with branched pendant groups comprising peripheral Me‐groups is more than ≈3–5 fold lower than that of analogous polymers with peripheral Et‐groups.

中文翻译：

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具有全硅氧烷性质的哑铃形，接枝和洗瓶聚合物：合成方法，热学和流变行为

建议使用一种方法来合成各种具有全硅氧烷性质的哑铃形，接枝和瓶刷聚合物（无碳硅烷接头）。这些宏架构是选自Si合成含OH的化合物，硅烷醇（ET ₃的SiOH）和所述第一和第二代的硅氧烷醇树突，与-and从包括端部和内部的Si线性硅氧烷的各种外围取代基（Me或Et）H基团由Piers-Rubinsztajn反应。产品和关键构件的产率高达95％。这些聚合物是耐热和防冻硅氧烷。事实证明，产物的物理性质不仅取决于大分子结构，线性链长，支链侧基的大小和频率，还取决于侧基中外围取代基的类型（Me或Et）。因此，具有外围Me-基团的支链侧基的接枝聚合物的粘度比具有外围Et-基团的类似聚合物的粘度低约3-5倍。