Project 1

Optimization of Viscosity in Epoxy Resins for Aeronautical Applications

Analysis and modification of organic compounds to achieve optimal rheological behavior under thermal and mechanical stress conditions.

Project Details
  • Client: Composite components manufacturer
  • Sector: Aeronautics
  • Duration: 8 months
  • Team: 3 chemical engineers
Confirmatory Materials

Complete technical report (45 pages)

Viscosity vs. temperature curve data

SEM micrographs of the final compound

The Task

The client was facing premature failures in lightweight structural panels due to inconsistency in the viscosity of the epoxy resin used as the matrix. This variability prevented uniform impregnation of the carbon fibers, creating weak points and reducing the overall integrity of the component under extreme thermal cycles (-55°C to 120°C).

Our Approach

We developed a three-phase methodology. First, a comprehensive rheological analysis of the base formulation to characterize its non-Newtonian behavior. Second, we synthesized and tested a series of organic modifiers based on flexible polymeric chains to alter the viscosity curve without compromising the final curing properties. Third, we modeled the thermal behavior of the optimized compound using finite element simulations.

Implementation

A cold modification protocol was implemented, incorporating a specific additive at a concentration of 1.8% by weight. This process was integrated into the client's existing production line, requiring only minor adjustments to mixing times. Inline quality controls with capillary viscometers were established to monitor viscosity in real-time before the impregnation stage.

Viscosity analysis in laboratory
Aeronautical composite component

Result and Impact

We achieved a 40% reduction in the viscosity variability of the resin, with a significantly flatter thermal behavior curve within the operational range. Panels manufactured with the optimized compound exceeded thermal fatigue tests by 300%, eliminating delamination failures. The client has standardized the modified formulation across all its production lines for critical components.

"The solution provided by CesmeGummastic not only solved an immediate technical problem but gave us an analytical framework for future material development. The rheological stability achieved is a key asset for our upcoming projects."

— R&D Director, Client

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