Epoxy Resins from fats. III. preparation and properties of resins from blends of a commercial diglycidyl ether and epoxidized glycerides cured with phthalic anhydride

Gelb, Leonard L.; Ault, W. C.; Palm, W. E.; Witnauer, Lee P.; Port, William S.

doi:10.1007/bf02667729

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…When used as a matrix material in composites, the resin state is desired to be rigid/glassy, i.e., below its T g , to effectively transfer energy to fibers [19]. ESO has a moderate viscosity so ESO or their derivatives can be used as reactive diluents for the partial replacement of diglycidyl ether of bisphenol A (DGEBA) resins, which are relatively high viscosity liquids or solids, to decrease the overall cost and improve the processability [20][21][22]. Generally, the mechanical strengths and thermal properties of ESO blended resins are not comparable to those of pure DGEBA epoxy resins, while their toughness can be better due to the introduction of a two phase structure [23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Vegetable oil-derived epoxy monomers and polymer blends: A comparative study with review

Wang¹,

Schuman²

2013

Express Polym. Lett.

155

118

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Abstract. Glycidyl esters of epoxidized fatty acids derived from soybean oil (EGS) and linseed oil (EGL) have been synthesized to have higher oxirane content, more reactivity and lower viscosity than epoxidized soybean oil (ESO) or epoxidized linseed oil (ELO). The EGS and ESO, for comparison, were used neat and in blends with diglycidyl ether of bisphenol A (DGEBA). Thermosetting resins were fabricated with the epoxy monomers and either BF 3 catalyst or anhydride. The curing behaviors, glass transition temperatures, crosslink densities and mechanical properties were tested. The results indicated that polymer glass transition temperatures were mostly a function of oxirane content with additional influence of glycidyl versus internal oxirane reactivity, pendant chain content, and chemical structure and presence of saturated components. EGS provided better compatibility with DGEBA, improved intermolecular crosslinking and glass transition temperature, and yielded mechanically stronger polymerized materials than materials obtained using ESO. Other benefits of the EGS resin blend systems were significantly reduced viscosities compared to either DGEBA or ESO-blended DGEBA counterparts. Therefore, EGS that is derived from renewable sources has improved potential for fabrication of structural and structurally complex epoxy composites, e.g., by vacuum-assisted resin transfer molding.

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Section: Introductionmentioning

confidence: 99%

Vegetable oil-derived epoxy monomers and polymer blends: A comparative study with review

Wang¹,

Schuman²

2013

Express Polym. Lett.

155

118

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“…In the context of such properties studies, previous investigations into anhydride-cured biobased epoxies highlight their potential. ,,,− This work examines the effects of hardener blending and the addition of commercial layered nanofiller on anhydride-cured epoxidized linseed oil (ELO) formulations, as observed through changes in hardness, storage modulus, and thermal transition temperature. The first part of the study focuses on optimization of resin composition while at the same time assessing the applicability of known correlations between Shore D hardness and elastic modulus. − NMA and MTHPA were tested, either by themselves or in blends, to understand the effects of anhydride selection and blending and identify optimized compositions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Catalyst Content, Anhydride Blending, and Nanofiller Addition on Anhydride-Cured Epoxidized Linseed Oil-Based Thermosets

Kuncho

Schmidt

Reynaud

2017

Ind. Eng. Chem. Res.

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A series of formulations based on epoxidized linseed oil, ELO cured with various anhydride hardeners, were investigated to assess the potential for enhanced elastic properties and thermal transitions through variations in catalyst concentration (1,8-diazabicyclo[5.4.0]undec-7-ene, DBU), hardener type (nadic methyl anhydride, NMA, methyltetrahydrophthalic anhydride, MTHPA, and their blends with phthalic anhydride, PA), and nanofiller (organically modified hydrotalcite, Perkalite F100S) content. To facilitate rapid screening, Shore D hardness was used as a proxy for Young’s modulus, and the limits of this approach were tested via comparisons with modulus measurements made via dynamic mechanical analysis (DMA). ELO cured with MTHPA at a 1:1 epoxy/anhydride molar ratio with 4.5 phr DBU gave a particularly attractive combination of rigidity, homogeneity, and alpha transition temperature rarely seen in thermosets composed of a 100% biobased epoxy component. Nanocomposite formation provided a modest increase in modulus with no change in thermal transitions.

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Über die Verwendung der Tierfette

Ault

Maerker

1961

Fette, Seifen, Anstrichm.

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Die voi-ca. 20 Jahren mit dem Ziel begonnenen Forschungsarbeiten des Eastern Regional Research Laboratory, Philadelphia, genuBuntaugliche Tierfette durch cheinische Behandlung in technische ,,Oleochemikalien" zu verwandeln und ihnen darnit einen groljeren Absatzniarkt zu verschaffen, haben zu betrdchtlichen Erfolgen gefiihrt. Die geradkettigen unverzweigten Fettsauren ldssen sich in zahlreiche Derivate uberfuhren, die fur die Herstellung yon Kunststoffen, wahrscheinlich auch van Schmiermitteln, von Wert sind.

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Epoxy Resins from fats. III. preparation and properties of resins from blends of a commercial diglycidyl ether and epoxidized glycerides cured with phthalic anhydride

Cited by 5 publications

References 4 publications

Vegetable oil-derived epoxy monomers and polymer blends: A comparative study with review

Vegetable oil-derived epoxy monomers and polymer blends: A comparative study with review

Effects of Catalyst Content, Anhydride Blending, and Nanofiller Addition on Anhydride-Cured Epoxidized Linseed Oil-Based Thermosets

Über die Verwendung der Tierfette

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