Silicone resins are hyperbranched macromolecules, which are nearly spherical in shape, nanometer in size, and covered with numerous terminal organic groups. For this reason, they can play a role of functionalized silica nanoparticles that are miscible with a polymer medium. In this paper, mixtures of linear polyisobutylene (PIB) with methyl-terminated silicone MT resin are considered. The phase states of mixtures were studied by laser interferometry method accompanied with rheological tests. It turned out that the solubility of the silicone resin in PIB matrix does not exceed a few percent even at high temperatures. Nevertheless, the addition of the resin significantly reduces the effective viscosity of PIB due to the shear-induced interlayer slip. To describe the concentration dependence of the blend viscosity, various empirical equations were considered, and their combination to describe the viscosity of blends in different phase states by one equation was proposed. Graphical abstract

中文翻译：

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聚异丁烯与有机硅树脂共混物的相态和流变学

有机硅树脂是超支化大分子，其形状接近球形，尺寸为纳米级，并覆盖有许多末端有机基团。出于这个原因，它们可以起到与聚合物介质混溶的功能化二氧化硅纳米粒子的作用。在本文中，考虑了线性聚异丁烯 (PIB) 与甲基封端有机硅 MT 树脂的混合物。采用激光干涉法和流变学测试方法研究了混合物的相态。结果表明，即使在高温下，硅树脂在 PIB 基体中的溶解度也不超过百分之几。然而，由于剪切引起的层间滑移，树脂的添加显着降低了 PIB 的有效粘度。为了描述混合粘度的浓度依赖性，考虑了各种经验方程，并提出了用一个方程来描述不同相态共混物粘度的组合。图形概要