Copper-Free Synthesis of Cationic Glycidyl Triazolyl Polymers

Area of Science:

• Polymer Chemistry
• Materials Science
• Electrochemistry

Background:

• Cationic polymers are crucial for various applications, including electrolytes.
• Developing efficient synthesis routes for functional polymers is essential.
• Understanding structure-property relationships is key to optimizing material performance.

Purpose of the Study:

• To synthesize novel cationic glycidyl triazolyl polymers (GTPs) via a copper-free click chemistry approach.
• To investigate the effect of different N-substituents on the properties of GTPs.
• To evaluate the ionic conductivity of the synthesized cationic GTPs.

Main Methods:

• Copper-free thermal azide-alkyne cycloaddition for GTP synthesis.
• Microwave-assisted decarboxylation for nonfunctionalized GTP preparation.
• Characterization using size exclusion chromatography, DSC, TGA, and impedance spectroscopy.

Main Results:

• Successfully synthesized three variants of cationic GTPs with N-ethyl, N-butyl, and N-EG3 substituents.
• GTP-H molecular weight determined by SEC; thermal properties analyzed by DSC and TGA.
• GTP with N-EG3 substituent exhibited the highest ionic conductivity (6.8 × 10^-6 S cm^-1 at 25 °C).

Conclusions:

• Copper-free synthesis provides an efficient route to cationic GTPs.
• Reduced steric crowding around the triazolium unit enhances ionic conductivity.
• N-EG3 substituted GTP shows potential as an electrolyte material.