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Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
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The Curing Rheokinetics of Epoxyphosphazene Binders
Natalia V Bornosuz1, Irina Yu Gorbunova1, Vyacheslav V Kireev1
1Faculty of Petrochemistry and Polymer Materials, Mendeleev University of Chemical Technology, 125047 Moscow, Russia.
Materials (Basel, Switzerland)
|December 16, 2020
Summary
Epoxyphosphazene additives accelerate hot curing in epoxy-amine systems by increasing molecular mass growth and network density. These modifiers improve hot curing efficiency, overcoming limitations observed in cold curing processes.
Area of Science:
- Polymer Chemistry
- Materials Science
Background:
- Epoxy-amine compositions are widely used thermosetting polymers.
- Understanding curing kinetics is crucial for optimizing material properties.
Purpose of the Study:
- To investigate the effect of epoxyphosphazene additives on hot curing of epoxy-amine systems.
- To analyze the rheological changes during the curing process.
Main Methods:
- Rotational viscometry was employed to study curing kinetics.
- The study focused on hot curing processes with varying additive concentrations.
Main Results:
- Epoxyphosphazene additives significantly accelerated the hot curing process.
- The molecular mass growth stage was reduced by nearly half with 30% modifier.
- High-density network formation was observed due to the polyfunctionality of epoxyphosphazene.
Conclusions:
- Epoxyphosphazene additives enhance hot curing efficiency in epoxy-amine systems.
- The observed improvements are attributed to increased network density.
- Cold curing limitations due to molecular bulkiness and lack of heat were addressed by proposing hot curing systems.
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