TY - JOUR

T1 - Influence of Anion and Cation Structures on Ionic Liquid Epoxy-Based Vitrimers

AU - Wanghofer, Florian

AU - Trausner, Carina

AU - Reisinger, David

AU - Wolfahrt, Markus

AU - Schlögl, Sandra

N1 - Publisher Copyright: © 2024 The Authors. Published by American Chemical Society.

PY - 2024/1/1

Y1 - 2024/1/1

N2 - Ionic liquids with selected anions (Tf2N-, BF4-, and PF6-) and imidazolium cations bearing two terminal epoxy groups and varying aliphatic, aromatic, and dicationic spacers were synthesized. The synthesis procedures followed ion exchange mechanisms and afforded the products in high yields. Vitrimers were prepared by curing the resins with dodecenyl succinic anhydride in the presence of a base catalyst. In a comprehensive approach, the influence of the ion structure on the cure kinetics, bond exchange reactions, and thermal, mechanical, and healing performance of the dynamic polyester networks was assessed. The tensile strength could be varied over several orders of magnitude (229 kPa-23.9 MPa), while the glass-transition temperatures ranged between 1 and 59 °C. Especially, the anion exchange was found to be a powerful tool to tailor the properties of the dynamic networks. By using the PF6- anion, a network with improved thermal, mechanical, and self-healing properties could be obtained.

AB - Ionic liquids with selected anions (Tf2N-, BF4-, and PF6-) and imidazolium cations bearing two terminal epoxy groups and varying aliphatic, aromatic, and dicationic spacers were synthesized. The synthesis procedures followed ion exchange mechanisms and afforded the products in high yields. Vitrimers were prepared by curing the resins with dodecenyl succinic anhydride in the presence of a base catalyst. In a comprehensive approach, the influence of the ion structure on the cure kinetics, bond exchange reactions, and thermal, mechanical, and healing performance of the dynamic polyester networks was assessed. The tensile strength could be varied over several orders of magnitude (229 kPa-23.9 MPa), while the glass-transition temperatures ranged between 1 and 59 °C. Especially, the anion exchange was found to be a powerful tool to tailor the properties of the dynamic networks. By using the PF6- anion, a network with improved thermal, mechanical, and self-healing properties could be obtained.

KW - anhydride

KW - epoxy

KW - ionic liquid

KW - self-healing

KW - transesterification

KW - vitrimer

UR - http://www.scopus.com/inward/record.url?scp=85181816333&partnerID=8YFLogxK

U2 - 10.1021/acsapm.3c02293

DO - 10.1021/acsapm.3c02293

M3 - Article

AN - SCOPUS:85181816333

VL - 6.2024

SP - 649

EP - 657

JO - ACS applied polymer materials

JF - ACS applied polymer materials

SN - 2637-6105

IS - 1

ER -