This article aims to propose a low-energy method for micron dispersion of entangled polymers. We chose Ethylene-Propylene-Diene Monomer (EPDM) as the entangled polymer and acrylic esters as the dispersants to prepare the organic dispersion of the entangled polymer based on the theory that in-situ polymerization of acrylic esters had the higher solubility parameter than the original monomer. The dispersion process of entangled polymer was similar to the phase inversion of emulsion due to the maximum viscosity and minimum interfacial tension at the point of dispersion. Specifically, the average diameter of the dispersed entangled polymer was 5–6 μm. The system could still maintain excellent dispersion stability without additional dispersants. Rheology characterized that the introduction of aliphatic isocyanate derivatives reacting with hydroxyl groups in the polyacrylate to form the cross-linked skeleton could enhance the stability of the system. Excitingly, this organic dispersion allowed flexible printed circuit to fold at any angle and direction when used as the coating, and the coating still maintained excellent dispersibility, flexibility, insulation, and adhesion after aging tests. This low-energy method for micron dispersion of entangled polymers could expand their applications in coatings and other fields while maintaining their own characteristics.

中文翻译：

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基于乳液相转化组成的缠结聚合物的低能微米分散


本文旨在提出一种用于缠结聚合物微米分散的低能量方法。基于丙烯酸酯原位聚合具有比原来更高的溶解度参数的理论，选择三元乙丙橡胶（EPDM）作为缠结聚合物，丙烯酸酯作为分散剂，制备了缠结聚合物的有机分散体。单体。由于分散点粘度最大、界面张力最小，缠结聚合物的分散过程类似于乳液的转相。具体而言，分散的缠结聚合物的平均直径为5-6μm。无需额外添加分散剂，该体系仍能保持优异的分散稳定性。流变学表征发现，引入脂肪族异氰酸酯衍生物与聚丙烯酸酯中的羟基反应形成交联骨架，可以增强体系的稳定性。令人兴奋的是，这种有机分散体用作涂层时，可以使柔性印刷电路以任意角度和方向折叠，并且涂层在老化测试后仍保持优异的分散性、柔韧性、绝缘性和附着力。这种用于缠结聚合物微米分散的低能量方法可以扩大其在涂料和其他领域的应用，同时保持其自身的特性。