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Updated: Jul 29, 2025
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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
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1-Methyl-4-R-1,2,4-triazolium (R = -CH2CH2OCH3, -CH2COOCH2CH3)-Based Ionic Liquids as Plasticizers for Solid
Long Liu1, Jinhu Bai1, Ze Su2,3
1Key Laboratory of Science and Technology on Particle Materials, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100049, China.
ACS Omega
|May 22, 2023
Summary
New energetic ionic liquids were synthesized and tested as plasticizers for hydroxyl-terminated polybutadiene (HTPB) curing systems. Ester-functionalized ionic liquids improved tensile strength and reduced glass transition temperature in HTPB elastomers.
Area of Science:
- Materials Science
- Polymer Chemistry
- Energetic Materials
Background:
- Ionic liquids are versatile materials with tunable properties.
- Plasticizers are crucial for modifying polymer properties like flexibility and processability.
- Hydroxyl-terminated polybutadiene (HTPB) is a common polymer used in energetic binders.
Purpose of the Study:
- To synthesize and characterize novel energetic ionic liquids.
- To evaluate their performance as plasticizers in hydroxyl-terminated polybutadiene (HTPB) curing systems.
- To investigate the structure-property relationships of these ionic liquids in HTPB elastomers.
Main Methods:
- Synthesis and characterization of six energetic ionic liquids.
- Evaluation of ionic liquids as plasticizers in HTPB curing systems.
- Mechanical testing (tensile strength, elongation at break) and thermal analysis (melting point, decomposition temperature) of the resulting elastomers.
- Analysis of glass transition temperature, storage modulus, and crosslink density.
- Investigation of intermolecular interactions using spectroscopic methods.
Main Results:
- Synthesized ionic liquids exhibit low melting points (-72.60 to -32.67 °C) and good thermal stability (161-348 °C).
- Ester-functionalized ionic liquids enhanced tensile strength and reduced the glass transition temperature of HTPB elastomers.
- Ether-functionalized ionic liquids improved elongation at break.
- The type of anion (NO3- vs. NTf2-) influenced the storage modulus.
- Hydrogen bonding interactions between ionic liquids and HTPB altered polymer segment distribution.
Conclusions:
- The synthesized energetic ionic liquids are suitable plasticizers for HTPB curing systems.
- The functional groups on the cation and the type of anion significantly impact the mechanical and thermal properties of HTPB elastomers.
- Ionic liquids offer a pathway to tailor the performance of energetic materials through controlled plasticization.
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