Polyacrylate elastomers have enormous application potential in various fields. However, facile and universal synthetic strategies remain rare for ultrastretchable polyacrylates (especially those with extension ratios ≥50) that are adaptable to various building blocks. Here, we develop a novel chain lubrication strategy to reduce the interchain friction and improve the slip of polymer chains during deformation. By constructing polyacrylates with soft, hard, and quaternary ammonium segments, we fabricate ultrastretchable elastomers (extension ratios up to 323) through emulsion polymerization and film casting, using quaternary ammonium surfactants (QASs) as emulsifiers. The lubricating mechanism of QASs is explored by varying the chemical structures of QASs, and it is demonstrated that QASs enhance the fluidity of polymer chains while forming eutectics with quaternary ammonium segments to construct physical cross-linking sites in the polymer networks. We also demonstrate the successful synthesis of a variety of ultrastretchable elastomers by replacing soft and hard segment monomers or surfactants, confirming the effectiveness and generalizability of the chain lubrication strategy. The chain lubrication strategy promises to pioneer new methods for fabricating highly ductile elastomers and advancing industrial rubbers.

中文翻译：

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超拉伸聚丙烯酸酯弹性体的通用链条润滑策略


聚丙烯酸酯弹性体在各个领域都有巨大的应用潜力。然而，对于适用于各种结构单元的超可拉伸聚丙烯酸酯（尤其是那些具有延伸比 ≥50） 的聚丙烯酸酯）来说，简单和通用的合成策略仍然很少见。在这里，我们开发了一种新的链润滑策略，以减少链间摩擦并改善聚合物链在变形过程中的滑动。通过构建具有软、硬和季铵链段的聚丙烯酸酯，我们使用季铵表面活性剂 （QAS） 作为乳化剂，通过乳液聚合和薄膜流延制造超可拉伸弹性体（延伸率高达 323）。通过改变 QASs 的化学结构来探索 QASs 的润滑机制，并证明 QASs 增强了聚合物链的流动性，同时与季铵链段形成共晶，从而在聚合物网络中构建物理交联位点。我们还展示了通过替代软硬链段单体或表面活性剂成功合成各种超拉伸弹性体，证实了链润滑策略的有效性和普遍性。链条润滑策略有望开创制造高延展性弹性体和推进工业橡胶的新方法。