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Synthesis of Vinyl-Containing MQ Copolymers in Active Medium
Alina Khmelnitskaia1, Aleksandra Kalinina1, Ivan Meshkov1
1Enikolopov Institute of Synthetic Polymeric Materials, Russian Academy of Sciences, Profsoyuznaya 70, 117393 Moscow, Russia.
Polymers
|February 13, 2026
Summary
Researchers developed a new chlorine-free method to create vinyl-containing MQ copolymers (MVinMQ). This controlled synthesis precisely tunes copolymer composition and properties for advanced materials applications.
Area of Science:
- Polymer Chemistry
- Materials Science
Background:
- MQ copolymers are versatile siloxane materials.
- Functional groups, like vinyl, enable property tailoring for specific uses.
Purpose of the Study:
- Synthesize vinyl-containing MQ copolymers (MVinMQ) using a controlled, chlorine-free method.
- Investigate the regulation of MVinMQ copolymer composition and properties.
Main Methods:
- Developed a controlled, chlorine-free polycondensation method.
- Analyzed copolymer composition, hydroxyl content, molecular weight, and thermal stability.
Main Results:
- Achieved precise control over copolymer architecture.
- Demonstrated increasing hydroxyl content and molecular weight with Q-unit fraction.
- Observed high thermal stability (5% mass loss >295 °C in air, >365 °C in argon).
- Fractionation data supported a molecular composite model (inorganic core, organic shell).
Conclusions:
- Polycondensation in an active medium is effective for directed synthesis of structurally tunable MVinMQ copolymers.
- These copolymers offer a versatile platform for functional hybrid materials, modifiers, and cross-linking agents.
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