Iron ion cluster-OH coordination as high-efficiency sacrificial bond for reinforcement of elastomer

作者：Zhang, Xuhui; Huang, Jing; Tang, Zhenghai; Guo, Baochun^*; Zhang, Liqun^*

来源：Polymer, 2020, 186: 122059.

DOI：10.1016/j.polymer.2019.122059

• Hydroxy-ion cluster coordination
• Reinforcement
• Elastomer

Although hydroxy is an easily-available group for polymer functionalization and can serve as a ligand to coordinate with metal ions, the hydroxy-ion cluster coordination remains unexploited as sacrificial bond to reinforce elastomers. This work reports a very strong rubber by introducing iron ion cluster-OH coordination into a covalently-crosslinked rubber. With the introduction of 4.2 wt% Fe3+, the rubber exhibits a 6-fold increase in tensile strength and an 8-fold increase in modulus when compared with neat rubber. The achieved tensile strength (similar to 20.9 MPa) and modulus (similar to 12.7 MPa) are competitive to the highly-filled engineering rubbers. Overall, this work presents a new method to prepare high performance elastomers based on a hydroxylated polymer. As hydroxylated polymers can be readily prepared with commercially available polymers, the present study should promote comprehensive research and industrial applications of sacrificial bond strategy.

• 单位
  北京化工大学; 5