Abstract
An epoxy resin based on cardanol and varying content of CTBN was cured using polyamine as a hardener. The ultimate aim of the study was to modify the brittle epoxy matrix by the liquid rubber to improve toughness characteristics. FTIR of the modified was performed to understand the structural transformations taking place during the uncured and cured stage of the modified systems. Also, the structures were proposed on the basis of the results of NMR and MALDI-TOF mass spectroscopic analysis along with GPC analysis. Mechanical properties of neat as well as modified networks have been studied to observe the effect of rubber modification. The improvement in these properties indicates that the rubber-modified resin would be more durable than the pure epoxy based on cardanol. A clear-cut two-step mass loss in dynamic thermogravimetric trace of unmodified and CTBN-modified systems was observed. Modified cardanol based epoxy network displayed two phase separated morphology.
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Yadav, R., Srivastava, D. Compatibility, thermal, mechanical and morphological properties of cardanol based epoxidized resin modified with liquid rubber. Int J Plast Technol 18, 27–48 (2014). https://doi.org/10.1007/s12588-014-9072-1
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DOI: https://doi.org/10.1007/s12588-014-9072-1