Curing behavior and properties of epoxy resins with high bio-based content cured with amine-type hardener ffrom S-limonene

PABLO M. STEFANI; NADIA STEJSKAL; VIVINA HANAZUMI; ROXANA RUSECKAITE

Dublín

Congreso; ECO-BIO 2018; 2018

Elsevier

Epoxy resins are the most common polymeric coatings that inhibited the process of metal corrosion due to its good chemical resistance, high tensile strength and modulus, high adhesion and dimensional stability. Unfortunately, most of the monomers and curing agents available today to prepare epoxy resins are derived from petroleum sources, accounting for about 7% of worldwide oil and gas consumption (1). This situation has encouraged the development of bio-based precursors to replace petroleum based ones. Among the renewable molecules of the chemical platform, naturally occurring long-chain fatty acids and terpenes are valuable and worldwide accessible bio-resources that can provide alternatives for the chemical industry (2,3). In this study, we focused on the structure?properties relationship of resins obtained by the replacement of increasing amounts of the synthetic epoxy pre-polymer based on diglycidyl ether of bisphenol A (DGEBA) with glyceryl tris (10,11-epoxidized undecanoate, E-GUD), abiogenic epoxy precursor, processed with stoichiometric amount of a diamine based on S-(-)-limonene (NH2-Li) as curing agent. The effect of E-GUD on thermal and optical properties of the thermosetting resins are discussed and related with the developed morphologies observed by electron scanning microscopy (SEM) and atomic force microscopy (AFM). Potential application of the partially renewable epoxy resins in coating technology and as matrices of nanostructured materials is also proposed.