Properties of biobased epoxy resins from epoxidized linseed oil (ELO) crosslinked with a mixture of cyclic anhydride and maleinized linseed oil

Abstract

This works aims at the development thermosetting resins derived from epoxidized linseed oil (ELO) of high biobased content, by using a mixture of crosslinking agents, i.e. methyl nadic anhydride (MNA) and maleinized linseed oil (MLO). By using only MNA as crosslinking agent, the obtained resins are characterized by high stiffness and, consequently, high fragility. When MLO content increasing in the crosslinking mixture, up to 25 wt%, a decrease in mechanical resistant and thermomechanical is detected, thus indicating that MLO can provide flexibility to ELO-based thermosetting resins which is an interesting issue to obtain tailored properties by selecting the appropriate mixture composition. In general, the thermosetting resin crosslinked with 10 wt% MLO and 40 wt% MNA gives balanced properties together with noticeable biobased content, thus broadening the potential of these materials for uses in green composites and coatings.

Mechanical and Flame-Retardant Properties of Nanocomposite Based on Epoxy Resin Combined with Epoxidized Linseed Oil, Which Has the Presence of Nanoclay and MWCNTs

“…When replacing partial synthetic polymers with different weights, the mechanical properties not only remain high compared with the synthetic polymers without mixing but also improve in some durability; in this case, the flexural strength increases, especially the Izod impact strength increases by 21.65%; this is a good result compared with the works being studied by Samper et al [16,17]. us, when replacing a part of fossil-derived substances with substances of biological origin (ELO), gel time and mechanical strength are maintained at a good level [18] e impact of ELO content on the fire retardant property of EP/ELO materials is presented in Table 3.…”

Synthesis and Characterization of Biodegradable Jatropha Oil Based Polyurethanes Using Modified Sesame Oil as Cross-Linker Containing Different NCO Groups with Improved Thermal Stability

“…Secondary hydroxyl group was newly formed during the methanolysis reaction of epoxidized sesame oil. On the other hand, the prepared jatropha-sesame oil based polyol, the -OH broad peak appeared at 3378 cm -1 , which showed a overlapped signal of all the primary and secondary -OH groups of polyols [14][15][16].…”

“…3) showed a epoxidized jatropha- oil. The FT-IR spectrum revealed that the presence of epoxy group at 843 cm -1 , respective epoxy oils [13][14][15][16]18]. The corresponding modified diol, the overlapped signal from the -OH stretching of hydroxyl group of modified sesame oil peak appeared at 3500-3000 cm -1 , then the intensity of epoxy group was reduced during the ring opening reaction using methanolysis [17,18].…”

“…In general, today it is possible for the researchers to chemically modify and transform the triglyceride into the reactive group via epoxidation, epoxidation and metathesis of double bond, and transesterification. However, oxirane ring content of linseed and soybean oils, presently it is used in appropriate curing agents in order to produce bio-based epoxies system with satisfactory properties [14][15][16][17][18][19].…”

Improved Toughness in Lignin/Natural Fiber Composites Plasticized with Epoxidized and Maleinized Linseed Oils

“…The results of the flexural tests ( Figure 2) show that the addition of ELO produces a progressive increase in tensile strength as the percentage of oil increases; simultaneously, a reduction in the flexural modulus is observed when the epoxidized oil content increases. The effectiveness of ELO as a coupling agent, as well as a plasticizer, with biopolymers and lignin-based fillers, was already demonstrated [21][22][23]. The progressive increase in strength with the ELO content is attributable to the good compatibility between lignin and fibrous reinforcement contained in the Arboform.…”