Furan resins are the derivatives of furfural alcohol and furfural. In all the room temperature curing resins, furan resins are one of the highest in thermal resistance with outstanding physical properties. Generally, synthetic resins are based on petrochemical but the furan resins are unique because they are based on agricultural byproducts such as corn cobs, bagasse, rice, and oat hulls are used to produce furfural alcohol [50]. The monomer of furan resin shown in Table 2. Table 2. Monomers of Furans resins[50]
Furans compound
Furan
Furfural
Furfuryl alcohol
5-Hydroxymethylfurfural (HMF)
2,5-Bis(hydroxmethyl)furan (BHMF)
5-Methylfurfural
2,5-Furandicarboxylic acid
The furan is a five member ring compound derived from cellulose and hemicelluloses. Its promising candidate…show more content… Chemical structure of BOF and BOB
Deng et al.54 synthesized diglycidyl ester of 2,5-furandicarboxylic acid(DGF) epoxy resin from the renewable 2,5-furandicarboxylic acid (FDCA). The synthesis of DGF epoxy resin was described into two steps:
1. Synthesis of bis(prop-2-enyl)furan-2,5-dicarboxylate (FDCE)
2. Synthesis of DGF (Scheme 16)
The comparative study of petroleum based diglycidyl ester of terephthalic acid (DGT) epoxy resin shows in Fig.7 and biobased diglycidyl ester of 2,5-furandicarboxylic acid (DGF) epoxy resin both resins are cured with methylhexahydrophtalic anhydride (MHHPA) and poly (propylene glycol)-bis(2-aminopropyl ether) D230 amine curing agent. From the results showed that DGF exhibit (152°C) glass transition temperature, higher curing reactivity and similar thermal stability and comparable mechanical properties compared by DGT cured system with same curing agent shown in Table 3.
Table 3. Thermal properties of the cured epoxy resin [54]
Sample Td5 (°C) Td30 (°C) R800 Ts Tg
DGF/D230 267 320 6.8 146 152
DGT/D230 266 322 8.2 147 128.8
DGF/MHHPA 293 381 1.9 169 101.2
DGT/MHHPA 284 378 5.2 167