Although dipolar forces between copolymer chains are relatively weak, they result in ubiquitous inter- and/or intramolecular interactions which are particularly critical in achieving the mechanical integrity of polymeric materials. In this study, a route is developed to obtain self-healable properties in thermoplastic copolymers that rely on noncovalent dipolar interactions present in essentially all macromolecules and particularly fluorine-containing copolymers. The combination of dipolar interactions between C─F and C═O bonds as well as CH₂/CH₃ entities facilitates self-healing without external intervention. The presence of dipole-dipole, dipole-induced dipole, and induced-dipole induced dipole interactions leads to a viscoelastic response that controls macroscopic autonomous multicycle self-healing of fluorinated copolymers under ambient conditions. Energetically favorable dipolar forces attributed to monomer sequence and monomer molar ratios induces desirable copolymer tacticities, enabling entropic energy recovery stored during mechanical damage. The use of dipolar forces instead of chemical or physical modifications not only eliminates additional alternations enabling multiple damage-repair cycles but also provides further opportunity for designing self-healable commodity thermoplastics. These materials may offer numerous applications, ranging from the use in electronics, ion batteries, H₂ fuel dispense hoses to self-healable pet toys, packaging, paints and coatings, and many others.

中文翻译：

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由偶极相互作用控制的自修复氟化共聚物

尽管共聚物链之间的偶极力相对较弱，但它们会导致无处不在的分子间和/或分子内相互作用，这对于实现聚合物材料的机械完整性尤为重要。在这项研究中，开发了一种途径来获得热塑性共聚物的自修复特性，该特性依赖于基本上所有大分子，特别是含氟共聚物中存在的非共价偶极相互作用。C─F和C=O键以及CH ₂ /CH ₃之间偶极相互作用的组合实体可以在没有外部干预的情况下促进自我修复。偶极子-偶极子、偶极子诱导偶极子和诱导偶极子诱导偶极子相互作用的存在导致粘弹性响应，控制氟化共聚物在环境条件下的宏观自主多循环自愈。归因于单体序列和单体摩尔比的能量有利偶极力诱导了理想的共聚物立构规整度，使机械损伤期间储存的熵能恢复成为可能。使用偶极力代替化学或物理改性不仅消除了额外的交替，从而实现了多个损坏修复周期，而且还为设计可自修复的商品热塑性塑料提供了进一步的机会。这些材料可提供多种应用，包括电子、₂燃油分配软管，用于自修复宠物玩具、包装、油漆和涂料等。