Multifunctional Epoxy Formulation with Improved Mechanical and Hygroscopic Properties for Aerospace Applications

Epoxy resin formulations were prepared with different combination of tri and tetra functional epoxy resins toughened with an engineering thermoplastic and cured with aromatic amines. 

The samples exhibited very good thermal, mechanical and hot-wet properties and are potential materials for making multi-functional polymer composites suitable for aerospace, automobile, wind mills and other applications.

• Curing cycle: Controlled rate of heating and cooling during the curing cycle to
  avoid any thermal shock to the formulated resin.
• Desired properties such as tensile strength of 105 MPa, fracture toughness of 2.05
  MPa.m0.5 and lower moisture absorption of 1.5% for epoxy resin system toughened with polyethersulfone (PES)
• Easy processing
• Significant retention of hot-wet properties (60-80%); suitable to make multifunctional composites for aerospace applications.