Matrix Preselection Based on Differential Scanning Calorimetry (DSC) for Newly Developed Epoxy Resins-based Multilayer Composites - Material Analysis

This paper describes a new method for preselecting the duroplastic matrix of multilayer composite materials based on differential scanning calorimetry (DSC), leading to improved composite production by reducing costs and material and time losses associated with the manufacture and testing of multiple sample populations. In this work, systems of proprietary matrix compositions based on Epidian 5 or Epidian 6 were tested and compared with the properties of commercial matrix systems Epidian 601 and Epidian 652, which are ready-made mixtures with active diluents. For each system, the activation energy, heat of cure reaction, degree of cure, and glass transition temperature were determined by differential scanning calorimetry. The results obtained were related to the determined mechanical properties (impact strength, Young's modulus, and bending strength) of the glass-fabric-reinforced laminates. The obtained results correlate with the preselection of matrix compositions based on thermal analyses, which directly translates into the applicability of the method DSC presented in the article. The selected best matrix systems were also differentiated by reinforcing phase, carbon fabric, and aramid fabric, with different weaves used.