Improving the Mechanical Properties of Adhesives Through Cross-Linker Variation

As known, the properties of the adhesive are influenced by the amount of cross-linkers, which is important for practical applications. Therefore, the films obtained were subjected to tensile tests, and the resulting curves are shown in Figure 4b. It is evident that the mechanical properties can be controlled by adjusting the amount of BDB used. For example, the stress at break of ESBO-B1.0 is 13.15 MPa, which is higher than that of ESBO-B0.6 (4.42 MPa), due to the increased usage of BDB during the preparation process. The calculated toughness also confirms that BDB strengthens the material. As shown in Figure 4c, the toughness of ESBO-B1.0 is approximately 5.23 MJ m-3, whereas ESBO-B0.6 only has 3.01 MJ m-3. The tensile results indicate that the mechanical properties of the adhesive can be tailored to meet specific requirements. Additionally, based on the DSC results, the Tg gradually increases with the amount of BDB. For instance, ESBO-B0.6 transitions from a glass state to a rubber state at approximately 16.8℃. In comparison, the Tg of ESBO-B1.0 is approximately 31.2℃, as the interaction between molecular chains strengthens with the increased amount of BDB.