Epoxy Resin Reinforcement via Epoxidized Para-Cresol Novolac and Pendant Epoxy-Functional PDMS: A Study on Mechanical and Thermal Attributes

In the current study, an effort was made to enhance the performance of Diglycidyl Ether of Bisphenol A (DGEBA) epoxy resin through modification with a binary system consisting of Epoxidized Para-Cresol Novolac (p-ECN) and Pendant Epoxy Functional Polydimethylsiloxane (PEF PDMS). The modifiers were combined in various ratios and incorporated into the DGEBA resin. The resulting blends were then cured under controlled conditions. The mechanical properties of the modified DGEBA resin were evaluated through tensile, flexural, and impact tests. The results indicated a significant improvement in mechanical strength compared to the unmodified resin. Thermal behaviour was assessed using Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Water absorption characteristics were evaluated by immersing the cured blends in water at room temperature for a specified duration. The modified resins demonstrated significantly reduced water uptake, indicating improved resistance to moisture. Overall, the incorporation of a combination of p-ECN and PEF PDMS into DGEBA resin significantly enhances its mechanical strength, thermal stability, and resistance to water uptake. These findings suggest that the binary modifier system is a promising approach for improving the performance of epoxy resins for various industrial applications.