Biobased carboxylic acid from S‐Limonene as potential curing agent of epoxy bioresins. Synthesis and Characterization

HANAZUMI, VIVINA; CRISTINA RAMIREZ; RUSECKAITE, ROXANA ; ASMUSSEN, SILVANA

Mar del Plata

Congreso; XVI Latin-American Polymer Symposium (SLAP 2018), XIV Iberoamerican Polymer Congress (CIP 2018); 2018

INTEMA

Epoxy resins are one of the most versatile thermosetting polymers with an extensive range of industrial applications1,2. Most of the commercially available epoxy resins are based on bisphenol A (BPA) that is suspected of potential health risks3. So, efforts have been undertaken to prepare building blocks, including epoxy precursors and hardeners, derived from readily renewable sources4,5. In this contribution a novel dicarboxylic acid with 71 % of biobased content was prepared by thiol-ene coupling and used as environmentally sound hardener of epoxidized soybean oil (ESO) as renewable monomer. Curing parameters including enthalpy of reaction (Hr) and peak temperature of the exothermic reaction (Tp) were determined from dynamic calorimetric studies. The glass transition temperature (Tg) was also determined. The apparent activation energy (Eaap) was estimated using the Kissinger method6