李晓虹副教授与屠迎锋教授合作在Macromolecules上发表研究论文

Effect of Coordination Sacrificial Bond Strength on Toughening Properties of Polyesters

Jie Chen1, Sheng Wang1, Jie Huan1, Zhikai Li2, Xiaoming Yang1, Xiaohong Li1*李晓虹, Yingfeng Tu1*屠迎锋

1Jiangsu Key Laboratory of Advanced FunctionalPolymer Design and Application, College of Chemistry,Chemical Engineering and Materials Science, SoochowUniversity, Suzhou 215123, China

2College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, China

Macromolecules,2024, 57, 9, 4054-4061

Abstract:By the coordination of dangling terpyridine (TPY) ligands with transition metal ions to form supramolecular cross-linking points as sacrificial bonds (SBs), a double-cross-linked system is constructed from the physically cross-linked semicrystalline polyesters. The mechanical properties are greatly enhanced, and the effect of coordination interaction strength on the toughening effect has been investigated by using different ions (Fe2+, Co2+, Ni2+, Cu2+, and Zn2+). It shows that stronger coordination bonds provide a larger Youngs modulus, but not for strength and toughness, which increase first and then decrease after achieving a maximum value at an optimal SB strength. This is due to the properties estimated at different strains, where the supramolecular and physically cross-linking points behave differently. Our results demonstrate that SB strength is not the higher, the better, which should be useful for the design of strong and tough materials.


链接:https://pubs.acs.org/doi/10.1021/acs.macromol.3c02452