Epoxy Equivalent Weight Research Articles

Extrusion blown films of poly(lactic acid) chain‐extended with food grade multifunctional epoxies

The effectiveness and efficiency of two food grade multifunctional epoxies with low and high epoxy equivalent weights in chain extending/branching poly(lactic acid) (PLA) were studied in a torque rheometer. Processing PLA and chain extender (CE) at 200°C for 300 s not only chain‐extended PLA effectively as indicated by a significant increase in the mixing torque as well as PLA's melt viscosity and molecular weight, but also branched it leading to its reduced crystallinity. Chain extension occurred through the ring opening reaction of epoxy groups in the CE with PLA's hydroxyl and/or carboxyl groups. CE with lower epoxy equivalent weight was more efficient due to its higher reactivity. Secondly, the processabilities of PLA films chain‐extended and branched with various amounts of the most efficient CE were assessed. Like in torque rheometer, chain extension and branching also occurred during film production as indicated by PLA's increased molecular weight and decreased crystallinity when blended with CE. However, film manufacture was feasible only for blends with up to 0.5% CE, becoming unprocessable above this content due to chain entanglement leading to increased viscosity. Chain extension/branching of PLA was beneficial in overcoming film's brittleness since its impact strength increased almost linearly with the CE content. POLYM. ENG. SCI., 59:2211–2219, 2019. © 2019 Society of Plastics Engineers

Ultrasound-Assisted Heterogeneous Synthesis of Bio-Based Oligo-Isosorbide Glycidyl Ethers: Towards Greener Epoxy Precursors.

The substitution of toxic precursors such as bisphenol A by renewable and safer molecules has become a major challenge. To overcome this challenge, the 12 principles of green chemistry should be taken into account in the development of future sustainable chemicals and processes. In this context, this paper reports the highly efficient synthesis of oligo-isosorbide glycidyl ethers from bio-based starting materials by a rapid one-pot heterogeneous ultrasound-assisted synthesis. It was demonstrated that the use of high-power ultrasound in solvent-free conditions with sodium hydroxide microbeads led for the first time to a fully epoxidated prepolymer with excellent epoxy equivalent weight (EEW). The structure of the epoxy precursor was characterized by FT-IR, NMR spectroscopy and high-resolution mass spectrometry (HRMS). The efficiency of the ultrasound-assisted synthesis was attributed to the physical effects caused by micro-jets on the surface of the solid sodium hydroxide microspheres following the asymmetrical collapse of cavitation bubbles.

Introduction of two polyvinyl alcohol resins for efficient solid support Cu‐catalyzed N‐arylation of α‐aminoacids with aryl halides in aqueous media

ABSTRACTIn this article, two polyvinyl alcohol (PVA)‐based resins were prepared by crosslinking of epoxidized PVA‐chains using of 4‐(4‐aminobenzyl)benzenamine as a crosslinker and polymerization of acrylated PVA chains in the another approach. The prepared PVA resins showed well hydrophilic and swelling properties in various organic solvents, which are used in solid‐phase organic synthesis (SPOS). Swelling properties of these resins were examined in dimethylformamide, tetrahydrofuran, water, ethanol, methanol, dichloromethane, and dioxane. Furthermore, the both resins were characterized by FTIR and 1H‐NMR and their properties such as epoxy equivalent weight (EEW) of epoxidized PVA and density of the resins were determined by analytical methods. Then, α‐amino acids such as L‐aspartic acid, L‐leucine, L‐alanine, L‐serine, L‐valine, L‐threonine, and L‐tyrosine were immobilized on both resins through esterification reaction between these α‐amino acids with the present hydroxyl groups on PVA resines, to carry out their solid‐phase N‐arylation reaction in the presence of CuI as a catalyst in milder and greener conditions than free resin protocols. Hydrolysis of the correponding N‐arylated α‐amino acids immobilized on the resins gave the N‐arylated α‐amino acids in high to excellent yields. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47597.

Fabrication and evaluation of structural film adhesive using oxazolidinone modified novolac epoxy resin

ABSTRACTEpoxy film adhesives are of prime importance for the fabrication of lightweight honeycomb structures for aerospace industries. This work involves the synthesis of oxazolidinone modified epoxy novolac resin (EPN‐OXA) via the reaction of EPN and toluene diisocyanate. EPN‐OXA was characterized by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, gel permeation chromatography, and epoxy equivalent weight. EPN‐OXA was blended with solid epoxy resin, polyethersulfone (PES) toughened liquid epoxy resin, dicyandiamide, and aluminum powder to fabricate a film adhesive curing at 170–180 °C. Effect of additives and curative on the adhesive property was studied to optimize the composition. Effect of PES on the optimized composition was studied in detail. The best composition exhibited lap shear strength of 370 ± 10 kgf cm−2 at 25 °C and the strength was retained to 75% at −196 °C and 52% at 120 °C. PES significantly enhanced the interfacial strength at different temperatures (~1.6‐fold at −196 and 25 °C and ~1.8‐fold at 120 °C). It also improved tensile strength and fracture toughness by 1.4‐ and 2‐fold, respectively. The toughening effect of PES was further confirmed by scanning electron microscopy images. PES marginally reduced the glass‐transition temperature and it exhibited no effect on thermal stability. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47520.

Controllability of epoxy equivalent weight and performance of hyperbranched epoxy resins

Hyperbranched epoxy resins (HERs) is a group of thermoset resins which can be used to improve specifically the toughness and strength of popular diglycidyl ether of bisphenol-A (DGEBA). However, a relationship between the epoxy equivalent weight (EEW) of HERs and the level of property improvement has not been established due to the difficulty to control their EEW. Here we report the synthesis of a series of hyperbranched epoxy resins with different EEW (EHBP-n) through thiol-ene click reaction between thiol-ended hyperbranched polyesters and allylglycidyl ether. The rheological properties of the uncured EHBP-n/DGEBA blends are determined by viscosity and modulus changes, and are directly affected by the EEW of EHBP-n. Moreover, the EEW of EHBP-n also can tune the glass transition temperature and mechanical performances of the cured EHBP-n/DGEBA composites, and these properties first increased and then decreased with a decrease in the EEW of EHBP-n. At 9 wt % of EHBP-6, the improvements on the tensile, flexural, impact and adhesive strengths are 38.9%, 35.3%, 158.6% and 96.2%, respectively, compared with those of cured DGEBA. This result will give a basic guidance for obtaining epoxy resins with various performance.

Green epoxy synthesized from Perilla frutescens: A study on epoxidation and oxirane cleavage kinetics of high-linolenic oil

Despite the growing interest in epoxidized vegetable oils (EVOs) as sustainable alternatives to petroleum-based epoxies, their high epoxy equivalent weight (EEW) (>250 g/eq) hinders use in high-strength applications. This study reports the synthesis of a sustainable EVO that possesses EEW of ∼164 g/eq – comparable to that of diglycidyl ether of bisphenol-A (DGEBA). Non-edible perilla oil, extracted from the non-edible seeds of Perilla frutescens, was used to synthesize sustainable green epoxy via Prilezhaev epoxidation reaction at 40, 50 and 60 °C for 8 h. Perilla oil was chosen due to its higher number of chemically modifiable groups (>90%), i.e. ∼62–65 wt. % linolenic acid (C18:3), ∼13–15 wt. % linoleic acid (C18:2) and ∼12–15 wt. % oleic acid (C18:1) moieties. Rates of epoxidation and side reactions were estimated by experimentally determining iodine, epoxy and α-glycol value of epoxidized perilla oil (EPeO) extracted at regular time intervals during synthesis. Kinetics of post-oxirane cleavage was studied at aforementioned reaction temperatures and times by reacting EPeO with formic acid in weight ratio of 1:3. Reaction kinetics studies for both epoxidation and ring opening reactions (pseudo) showed reaction rate constants in the order of 10−6 L mol−1 s−1 (for both reactions) and activation energies of 20.10 kJ/mol (epoxidation) and 43.11 kJ/mol (ring opening) respectively. Thermodynamic parameters – such as activation enthalpy, activation entropy, and Gibbs’ free energy of activation – were calculated for both epoxidation and oxirane ring cleavage reactions. All the thermodynamic parameters were observed to be lower for epoxidation reaction compared to post-oxirane cleavage reaction. Enthalpy of activation was found to be ∼18 kJ/mol for epoxidation reaction while it was ∼56 kJ/mol for post-oxirane cleavage reaction.

Development of Siloxane Based Tetraglycidyl Epoxy Nanocomposites for High Performance Applications—Study of the Thermo Mechanical, Electrical, XRD, EDS and Physical Properties

A study was made in the present investigation on siloxane containing tetraglycidyl epoxy nanocomposites to find its suitability for use in high performance applications. The synthesis and characterization of the siloxane tetraglycidyl epoxy resin denoted as ‘E’ was done as reported in our previous study. Nanoclay and POSS-amine nano-reinforcements denoted as N1 and N2 were incorporated into the synthesized epoxy resin. Curing was done with diaminodiphenylmethane (DDM) and bis(3-aminophenyl) phenyl phosphine oxide (BAPPO) curing agents denoted as X and Y respectively. The mechanical, thermal, flame retardant and water absorption behavior of the epoxy nanocomposites were studied in our previous research paper. In our current research, we continue this study and analyze the thermo-mechanical, electrical, X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and physical properties (viscosity, epoxy equivalent weight (EEW) and gel permeation chromatography (GPC) studies).

Novolac epoxy resin from 4,4′‐dihydroxybenzophenone: Thermal, thermomechanical, interfacial, and cure kinetics with DGEBA/DICY blend

ABSTRACTA novolac epoxy resin based on 4,4′‐dihydroxybenzophenone (BZPNE) was synthesized via epoxidation of 4,4′‐dihydroxybenzophenone novolac resin (BZPN). BZPN was obtained by strong mineral acid catalyzed reaction of 4,4′‐dihydroxybenzophenone (BZP) and paraformaldehyde. The formation of BZPNE and BZPN was confirmed by Fourier transform infrared spectroscopy, proton and carbon nuclear magnetic resonance spectroscopy, gel permeation chromatography, and epoxy equivalent weight. Different blends of BZPNE with diglycidyl ether of bisphenol‐A (DGEBA; EEW ∼180) were cured using dicyandiamide were characterized by thermogravimetric analysis, thermomechanical analysis, dynamic mechanical analysis, and interfacial property between aluminum adherends at ambient and elevated temperature. Thermal properties were found to improve on increasing quantity of BZPNE in DGEBA as it is evidenced from glass transition temperature (Tg). Likewise, no deterioration in interfacial properties was observed with the highest quantity of BZPNE (30%) in DGEBA blend, when tested at 150 °C. Cure kinetics of compositions were studied by nonisothermal differential scanning calorimetry and Kissinger method was used to compute the kinetic parameters such as frequency factor (A), activation energy (Ea) followed by the dependency of rate constant (k) on temperature of different blends. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46164.

(UV/Oxidative) dual curing polyurethane dispersion from cardanol based polyol: Synthesis and characterization

This study reports the synthesis and property evaluation of UV/oxidative dual curing waterborne polyurethane dispersion prepared from cardanol-based polyol using different mode of curing. Cardanol-based polyol was prepared by reacting epoxidized cardanol with itaconic acid in presence of triphenyl phosphine catalyst. Structures of cardanol-based intermediates (both epoxidized cardanol and polyol) are confirmed by FTIR, 1H NMR and 13C NMR spectroscopy. The intermediates were characterized for various physicochemical properties such as hydroxyl value, acid value, epoxy equivalent weight (EEW), viscosity, color etc. Waterborne polyurethane oligomer was synthesized by reacting polyol, isophorone diisocyanate (IPDI), dimethylol propionic acid (DMPA) and 2-hydroxy methyl methacrylate (HEMA) in acetone as solvent. The prepolymer was neutralized with triethyl amine (TEA) and subsequently dispersed in deionized water and oligomer was obtained after removal of acetone. The coating films were formulated using suitable metal drier and/or photoinitiator blend based on different mode of curing, viz. oxidative curing, UV curing and (UV/oxidative) dual curing. The impact of curing process on properties of cured films was evaluated. Influence of curing process has been investigated by DMA, DSC and gel content analysis. The results showed that crosslink density plays an important role in deciding the final performance properties of cured films. The increase in crosslink density of UV/oxidative dual-cured system leads to an improvement in thermal, mechanical, chemical, water and solvent resistance properties along with other coating performance properties. In conclusion, the result of this study confirms that cardanol-based waterborne oligomer is suitable candidate for high performance environment-friendly coatings.

Synthesis and Characterization of Bio-oil-Based Self-Curing Epoxy Resin

A novel self-curing epoxy resin was synthesized using bio-oil. Bio-oil was produced by hydrothermal liquefaction of loblolly pine and utilized as a biopolyol in the synthesis of bio-oil-based epoxy resin (BOBER) for the first time. Hydroxyl groups in bio-oil were analyzed by quantitative 31P NMR. It was found that not only does the total hydroxyl number of bio-oil influence the yield and epoxy equivalent weight of BOBER, but also the distribution of hydroxyl groups within bio-oil (aliphatic, phenolic, and acidic OH) played an important role in the determination of the optimum amount of catalyst in the synthesis of BOBER. Differential scanning calorimetry analysis proved the self-curing phenomena of BOBER, and Fourier transform infrared spectroscopy suggested that etherification reaction was the dominate reaction during the self-curing. Glass transition temperature, cross-linking density, and the storage modulus of self-cured BOBER were calculated using a dynamic mechanical analyzer.

Fracture toughness and ductile characteristics of diglycidyl ether of bisphenol-A resins modified with biodegradable epoxidized linseed oil

Abstract Epoxidized linseed oil (ELO) was synthesized to improve the biodegradability and fracture toughness of the diglycidyl ether of bisphenol-A (DGEBA). The ELO was characterized using Fourier transform infrared (FT-IR) spectroscopy, gel permeation chromatography (GPC), and epoxy equivalent weight (EEW) tests. DGEBA was blended with ELO contents from 10 to 40 wt% to obtain a modified network. DGEBA and the DGEBA/ELO blends were characterized by their biodegradability, thermal properties, and fracture toughness. The thermal properties of the DGEBA/ELO blends were investigated using differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The fracture toughness of the DGEBA/ELO blends was studied by measuring the Izod impact strength and the critical stress intensity factor (KIC). The morphologies were observed by scanning electron microscopy (SEM). In the biodegradability results, the DGEBA/ELO blends degraded 5% of the initial weight. The thermal property results confirmed that the crosslinking density of the epoxy networks decreased. The impact strength of the DGEBA/ELO blends was significantly improved with the addition of ELO owing to the reduced cross-linking density of the epoxy network.

Flame-retardant halogen-free polymers using phosphorylated hexaglycidyl epoxy resin

Flame-retardant halogen-free epoxy resin, containing phosphorus and nitrogen atoms in the main chain, was synthesized through the curing of tris(3-(bis(oxiran-2-ylmethyl)amino)phenyl)phosphine oxide (HGE, hexaglycidyl epoxy monomer), starting from tris(3-aminophenyl) phosphine oxide (TAPO) and epichlorohydrin. The molecular structure of HGE with molecular weight 660 was confirmed using Fourier transform infrared, nuclear magnetic resonance, and liquid chromatography–mass spectrometry techniques. Epoxy equivalent weight determined by titration method was 120. The thermal curing behavior of the HGE/TAPO was investigated by differential scanning calorimetry. An intense exotherm due to curing reaction was observed in the temperature range from 123°C to 215°C. The HGE cured with TAPO, 4,4′-diaminodiphenylsulfone (DDS), and 1,5-diaminonaphthalene (DAN) and the thermal behaviors were studied by thermogravimetric analysis. The flame retardancy properties of the HGE/TAPO, DDS, and DAN were evaluated by vertical burning test (UL-94 V). The high performance cured epoxy resins showed high thermal stability and UL-94 V-0 flame retardancy rating.

Synthesis of bio-based epoxy resin from gallic acid with various epoxy equivalent weights and its effects on coating properties

The bio-based epoxy resins for coating application were synthesized from gallic acid (GA) in various molar ratios with epichlorohydrin (ECH). The reaction was carried out in the presence of sodium hydroxide (NaOH) and phase-transfer catalyst tetrabutylammonium bromide. The reaction progress rate at various molar ratios as 1:8, 1:12, and 1:16 with respect to time was monitored by calculating the epoxy content. The epoxy content value increases in the product as the molar ratio of GA to ECH increases. Epoxy equivalent weight of products was evaluated by physiochemical method and structure illustrated by Fourier transform infrared and 1H-nuclear magnetic resonance spectroscopy. This bio-based epoxy resin was cured with polyamide hardener, and the coating properties such as mechanical, chemical, and solvent resistance were studied. The cured films have been evaluated for glass transition temperature (T g) and thermal behavior by a differential scanning calorimeter and thermogravimetric analysis, respectively. The bio-based epoxy coatings show interesting mechanical, chemical, and thermal properties as compared to the conventional epoxy resin. The gel and water absorption of polyamide-cured coatings has also been evaluated.

Highly efficient preparation of hyperbranched epoxy resins by UV-initiated thiol-ene click reaction

Hyperbranched epoxy resins (HEPs) attract an increasingly interest due to their remarkably reinforcing and toughening properties on thermoset. A major challenge for HEPs is the serious environmental pollution resulted from the large amount of organic solvents used during tedious synthetic procedure. Another challenge is low yield and low epoxy content of HEPs, resulting in low crosslinking density and impairing mechanical strength and compatibility with matrix. Here we report a fast and environmentally friendly approach to addressing these challenges using a UV-initiated thiol-ene click reaction. The new synthesis process has been used to prepare not only hyperbranched epoxides with high epoxy content, and also many kinds of glycidyl ether epoxy resins (mono-epoxide, di-epoxides, tri-epoxides) based on thiols precursors and allylglycidyl ether. Their chemical structures and molecular weights were characterized by FT-IR, 1H NMR, electrospray ionization mass spectrometry (ESI–MS) and GPC spectra. All the click reactions took only 5–10 min of UV radiation at room temperature and show very high yields between 98.1 and 99.8%, and epoxy equivalent weight of all the epoxy resins is very close to its theoretical value. This fast and environmentally friendly process may open a new avenue for the design and synthesis of HEPs as well as common epoxy resins.

Synthesis and characterization of the nano alumina-filled tetraglycidyl-4, 4′-diaminodiphenylmethane epoxy resin

In this study, the in situ incorporation of the inorganic alumina nanoparticles into the reactants of tetraglycidyl-4, 4′-diaminodiphenylmethane (TGDDM) epoxy resin represented an efficient way for the preparation of alumina/TGDDM nanocomposite. The surface modification of the alumina nanoparticles was carried out using two individual silane coupling agents, namely, aminopropyltriethoxysilane (APS) and glycidoxypropyltrimethoxysilane (GPS). The degree of silane grafting was evaluated for both coupling agents using FTIR spectroscopy and thermogravimetric analysis. The epoxy equivalent weight (EEW) of the epoxy resin in addition to the weight percentage of the lost nanoparticles during TGDDM polymerization was used as measurements of the polymerization yield. The neat nano alumina has more adverse effect on the epoxy EEW value (171 g/mol) than both silane-modified nano alumina (143–157 g/mol, depending on the reaction conditions). The degree of nano alumina dispersion in the epoxy matrix was investigated using SEM micrographs. The longer and more deflected crack pathways on the fractured surface of the alumina/TGDDM nanocomposites may be attributed to a relatively good degree of dispersion of the silane-modified alumina nanoparticles in the epoxy matrix. Compared to neat alumina, the better dispersion of the silane-modified alumina nanoparticles may be related to the improved interfacial interactions between the oxiran or amine groups available on the silane-modified alumina nanoparticles and the TGDDM epoxy functional groups. Besides, the higher exothermic heat of cure (i.e., 30–53 %) as evidenced in differential scanning calorimetry may be due to a rather good state of dispersion of silane-modified alumina nanoparticles.

Preparation, characterization, and properties of organic silicone intermediate-modified epoxy resin copolymers

In this work, a series of silicone-containing epoxy copolymers (E231) were synthesized through a condensation reaction between the Si-OCH3 of SY231 and the –OH of E51. The chemical structural determinations of the copolymer were carried out with the Fourier transform infrared spectroscopy, nuclear magnetic resonance (NMR), and an epoxy equivalent weight test. Besides, the grafting content of SY231 in E231 copolymers was determined by the proton (1H) NMR integration technique. The mechanical properties, thermal stabilities, and morphology of impact fractured surface of cured products were also investigated. The experimental results show that increased impact strength was observed for the cured E231 products, meanwhile the improvement of the impact strength was closely related to the content of silicone in copolymers. A smooth surface was observed on the neat epoxy specimen, while a rough surface was observed by scanning electron microscopic examination on the impact fractured surface of the cured E231 products. The data of TGA indicated that silicone exerted its thermal stability through thermal decomposition energy dissipation, acted as thermal insulation, and finally enhanced the solid residue at 800°C. Dynamic thermomechanical analysis tests displayed that the glass transition temperature of epoxy systems decreased slightly with the introduction of the flexible organosilicone.

Correction to Synthesis and Characterization of Thermosetting Furan-Based Epoxy Systems

In continuing our research on furanyl-based epoxy (BOF) systems that were the basis for ref 1, we discovered an important error in that work regarding the preparation of the benzyl-based analogue systems (BOB). Although the stoichiometric ratios of BOB systems quoted in the paper are correct, during the preparation of the samples an unfortunate transposition of digits occurred that resulted in BOB thermosets being prepared off stoichiometrythe epoxy equivalent weight (EEW) of BOB is 126, but EEW = 162 was used in sample preparation. This resulted in epoxy-rich systems being tested that have lower Tg than those prepared at stoichiometry. The major change in observations/conclusions is that the Tg for BOB systems is slightly higher than BOF while the paper reports the opposite. The conclusions concerning differences in glassy modulus and the impact of the additional methylene linkage on Tg remain unchanged. We have repeated all experiments and submit a corrected paper as Supporting Information with the new data for the BOB systems making appropriate changes when necessary.

Effects of Reaction Parameters on the Glycidyl Etherification of Bark Extractives during Bioepoxy Resin Synthesis

This study outlines the influence of a series of reaction conditions on the yield and reactivity of the glycidyl etherification reaction of the bark extractive-based bioepoxy monomer (E-epoxy). To maximize the yield and epoxy content, the glycidylation reaction was examined with various substrates, solvents, catalysts, time periods, reaction temperatures, and sodium hydroxide/hydroxyl (NaOH/OHV) ratios. Spray-dried bark extractives were used as substrates due to their higher hydroxyl group content and lower molecular weight compared to the oven-dried bark extractives. A dioxane/water combination was selected from among four solvents based on the yield and epoxy equivalent weights of the final product, and tetrabutylammonium hydroxide was chosen as a ring-opening catalyst due to its effect of suppressing hydrolysis. Furthermore, a response surface methodology was applied to find the optimal reaction time, reaction temperature, and NaOH/OHV ratio of the E-epoxy monomer. The maximum extent of conversion with...

Silicone modified epoxy resins with good toughness, damping properties and high thermal residual weight

In this research, a series of epoxy-silicone copolymers were prepared from methyl phenyl silicone intermediates (PMPS) with a bisphenol A type epoxy resin (E-51) by condensation with dilaurate dibutyltin acting as catalyst. The chemical structure of the siloxane-bridged epoxy resin was characterized by Fourier transform infrared spectroscopy (FTIR), 1H-NMR and an epoxy equivalent weight (EEW) test. The modified epoxy resins showed better elongation at break and izod notched impact strength than neat resin. TGA results revealed that the residue at 600 °C of the modified epoxy resin increased with the increase of siloxane content. DMA tests displayed that the addition of silicone effectively enhanced the damping properties. Morphology studies indicated that the increase in izod notched impact strength is due to the suitable diameter of silicone phases because of the silicone toughening effect.

Biobased Epoxy Nanocomposites Derived from Lignin-Based Monomers.

Biobased epoxy nanocomposites were synthesized based on 2-methoxy-4-propylphenol (dihydroeugenol, DHE), a molecule that has been obtained from the lignin component of biomass. To increase the content of hydroxyl groups, DHE was o-demethylated using aqueous HBr to yield propylcatechol (DHEO), which was subsequently glycidylated to epoxy monomer. Optimal conditions in terms of yield and epoxy equivalent weight were found to be 60 °C with equal NaOH/phenolic hydroxyl molar ratio. The structural evolution from DHE to cured epoxy was followed by (1)H NMR and Fourier transform infrared spectroscopy. The nano-montmorillonite modified DHEO epoxy exhibited improved storage modulus and thermal stability as determined from dynamic mechanical analysis and thermogravimetric analysis. This study widens the synthesis routes of biobased epoxy thermosets from lignin-based molecules.