CHEMICAL AND MORPHOLOGICAL EFFECTS OF POLYURETHANE AND LIQUID SILICONE RUBBER ON EPOXY COMPOSITES

Roaa Mohammed  Muneer

doi:10.30572/2018/KJE/160429

Authors

Roaa Mohammed Muneer Al-Mussaib Technical Institute, Al-Furat Al-Awsat Technical University, Kufa 54001, Iraq

DOI:

https://doi.org/10.30572/2018/KJE/160429

Keywords:

Epoxy, FTIR, SEM, liquid silicon rubber, polyether polyol

Abstract

This study aimed to improve the morphological properties of Sikadur 52 epoxy resin by incorporating polyurethane (PU) and liquid silicone rubber (LSR) as toughening agents. The modifiers were added at various weight percentages (3, 6, 9, and 12%) and cured with a hardener. SEM analysis revealed microphase separation within the epoxy matrix, with distinct PU and LSR domains. FTIR analysis verified that addition of LSR strengthened some chemical bonds in the epoxy matrix, and SEM analysis provided direct information about phase separation behaviors of the modified epoxies. This micro-phase separation is believed to contribute to the enhanced mechanical properties of the modified epoxy resins

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