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Facile and Efficient Synthesis of Fluorosilicone Polymers by Using an Optimized Gradient Ring-Opening Reaction
Jing-Yang Li1, Hong-Tao Pan1, Fan Yang1
1College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, China.
Macromolecular Rapid Communications
|October 29, 2024
Summary
A new gradient strategy enhances fluorosilicone polymer synthesis, improving yield and precisely controlling fluorine content for demanding applications. This method offers a facile and efficient route to high-performance fluorosilicone materials.
Area of Science:
- Materials Science
- Polymer Chemistry
Background:
- Fluorosilicone rubber is critical for sealing in extreme temperatures and non-polar environments.
- Producing fluorosilicone polymers with medium to high fluorine content at high yields is challenging.
Purpose of the Study:
- To develop a facile and efficient gradient strategy for synthesizing fluorosilicone polymers.
- To improve polymer yield and precisely control fluorine content.
Main Methods:
- Modified cyclic monomer addition based on ring-opening polymerization (ROP) rates.
- Utilized anionic ring-opening polymerization (AROP) and cationic ring-opening polymerization (CROP) within a gradient strategy.
- Investigated and optimized polymerization effects on viscosity and yield.
Main Results:
- Achieved high yield (86.6%) for vinyl-terminated fluoromethylsilane with 60% fluorine content (FMS-Vi-60F).
- Obtained high viscosity (150,000 mPa·s) in a short reaction time.
- Demonstrated superior performance compared to previous methods.
Conclusions:
- The developed gradient ring-opening method provides a facile and efficient synthesis for fluorosilicone polymers.
- This approach enables high yield and tunable fluorine content for advanced materials.
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