Boron esters are reversible covalent bonds formed by the complexation of phenylboronic acid and diols. In aqueous solutions, the strength of boron ester bonds depends on the pH of the solution and the pKa of phenylboronic acid. When the pH of the solution is higher than the pKa of phenylboronic acid, boron ester bonds are easily formed. Conversely, when the pH of the solution is lower than the pKa of phenylboronic acid, the equilibrium tends towards free phenylboronic acid and diols. Due to the dynamic equilibrium between phenylboronic acid-diols and boron ester bonds, bond rearrangement can occur, leading to self-healing when the boron ester bonds at the damaged interface of the material rearrange. Additionally, under solvent-free conditions, direct ester exchange reactions can occur between boron ester bonds, allowing for network rearrangement. Many scholars at home and abroad have conducted in-depth research on boron ester bonds. For example, Guan et al. [46] studied the rate-tunable boron ester ester exchange reaction and utilized the principle of different kinetics of boron ester exchange reactions caused by the electronegativity difference of substituents on the adjacent positions of boron ester. They reacted two different diboronates with the adjacent diol grafted in the polymer to crosslink the polymer and studied the influence of the rate of exchange reaction on network rearrangement. Polymer systems with faster exchange reaction rates of boron ester exhibited excellent self-healing properties and good repeatability in processing. The mechanical properties of materials processed three times remained essentially unchanged. On the other hand, polymer systems with slower exchange rates of boron ester had almost no healing ability and poor repeatability in processing

请根据以下段落的上下文意思将其翻译为英文科研论文。段落为:硼酸酯是由苯硼酸和二醇类物质络合形成的可逆共价键。在水溶液中硼酸酯键的强度依赖于溶液的pH和苯硼酸的pKa。当溶液的pH大于苯硼酸的pKa时硼酸酯键很容易形成。相反当溶液pH小于苯硼酸pKa时平衡趋向于游离的苯硼酸和二醇。由于苯硼酸-二醇和硼酸酯键之间存在动态平衡因此可以发生键的重排当材料破损界面的硼酸酯键发生重排时就能够发生自修复。此外在

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