Physics-mechanical and viscoelastic properties of polymer compositions based on synthetic oligomer ED-20 and epoxidized soybean oil

2021 ◽  
Vol 43 (2) ◽  
pp. 95-102
Author(s):  
L.A. Gorbach ◽  
◽  
N.V. Babkina ◽  
O.G. Purikova ◽  
A.V. Barantsova ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Soybean Oil ◽  
Epoxy Resin ◽  
Viscoelastic Properties ◽  
Relative Elongation ◽  
Crosslinking Density ◽  
Epoxidized Soybean Oil ◽  
Premature Failure ◽  
Epoxy Composition

The work was aimed at studying the effects of combining epoxidized soybean oil (ESO) with standard bisphenol type A epoxy resin (ED-20). The ED-20 / ESO ratios were 100/0, 90/10, 95/15 and 80/20 (wt%). The system was cured with amine hardener mono(cyanethyl) diethylenetriamine (MCDT), triethanolamine (TEA) and mixture thereof (TEA + MCDT) at different curing temperatures. The choice was based on the hardener’s ability to open oxirane cycles, form a spatial network and initiate several parallel reactions. The viscoelastic properties, mechanical properties (tensile strength and elongation) were studied the density of obtained ED-20 / ESO samples was determined. The results showed that the introduction of ESO into epoxy resin ED-20 was accompanied by significant changes in the curing and final properties of the samples. It was shown that the physic- mechanical properties of polymer compositions ED-20 / ESO were determined by both the ESO content and the temperature of curing Depending on the selected curing mode, the addition of 5–10 wt.% of ESO increased the tensile strength relative to the σр value of the original epoxy matrix. The values of relative elongation increased significantly at 15-20 wt.% of ESO. By the method of dynamic mechanical analysis it was shown that the increase of ESO content leads to plasticization of epoxy composition and to reduction of crosslinking density. It was determined that 5-10 wt.% was the optimal concentration of ESO, at which the epoxy composition had improved physical and mechanical properties Further increase of ESO content reduced the crosslinking density and increased the defectiveness of the epoxy polymer, which causes premature failure in weak places of the structure under load.

scholarly journals Physicomechanical Properties of Epoxyurethane Biocomposites Strengthened with Hemp Wood Core

2021 ◽  
Vol 9 (1) ◽  
pp. 9-18
Author(s):  
Tetian Samoilenko ◽  
Larysa Yashchenko ◽  
Natalia Yarova ◽  
Oleh Babich ◽  
Oleksandr Brovko
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Soybean Oil ◽  
Epoxy Resin ◽  
Physicomechanical Properties ◽  
Polymer Matrices ◽  
Epoxidized Soybean Oil ◽  
Maximum Content ◽  
Properties Of Composites

Hemp wood core (HWC) filled Si-containing epoxyurethane biocomposites, in which diane epoxy resin was replaced with epoxidized soybean oil (ESO), were obtained. It was shown that the tensile strength of ESO-containing polymer was higher, and the flexural strength was lower than those of original polymer. HWC was especially effective strengthening filler for modified epoxyurethanes, because in that case mechanical properties of composites were higher than those of unfilled polymer matrices. Particularly, flexural and tensile strength of unfilled epoxyurethane with maximum content of ESO were 8.1 and 6.8 MPa respectively, while in corresponding composite they reached 17.3 and 15.7 MPa.

Thermal and mechanical properties of epoxy resin toughened with epoxidized soybean oil

2012 ◽  
Vol 113 (2) ◽  
pp. 939-945 ◽  
Author(s):  
Yan Chen ◽  
Liting Yang ◽  
Jiahui Wu ◽  
Lijun Ma ◽  
David E. Finlow ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Soybean Oil ◽  
Epoxy Resin ◽  
Epoxidized Soybean Oil ◽  
Thermal And Mechanical Properties

Epoxidized soybean oil grafted with CTBN as a novel toughener for improving the fracture toughness and mechanical properties of epoxy resin

2019 ◽  
Vol 52 (3) ◽  
pp. 345-357 ◽  
Author(s):  
Quang-Vu Bach ◽  
Cuong Manh Vu ◽  
Huong Thi Vu ◽  
Thai Hoang ◽  
Tran Vinh Dieu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Soybean Oil ◽  
Epoxy Resin ◽  
Epoxidized Soybean Oil

scholarly journals The Influence of Mixing Methods of Epoxy Composition Ingredients on Selected Mechanical Properties of Modified Epoxy Construction Materials

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 411
Author(s):  
Izabela Miturska ◽  
Anna Rudawska ◽  
Miroslav Müller ◽  
Monika Hromasová
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Construction Materials ◽  
Preliminary Heating ◽  
Epoxy Composition ◽  
Mixing Speed ◽  
Adhesive Composition ◽  
Adhesive Compositions ◽  
The Matrix ◽  
Level Of Significance

The proper process of preparing an adhesive composition has a significant impact on the degree of dispersion of the composition ingredients in the matrix, as well as on the degree of aeration of the resulting composition, which in turn directly affects the strength and functional properties of the obtained adhesive compositions. The paper presents the results of tensile strength tests and SEM microphotographs of the adhesive composition of Epidian 57 epoxy resin with Z-1 curing agent, which was modified using three fillers NanoBent ZR2 montmorillonite, CaCO3 calcium carbonate and CWZ-22 active carbon. For comparison purposes, samples made of unmodified composition were also tested. The compositions were prepared with the use of six mixing methods, with variable parameters such as type of mixer arm, deaeration and epoxy resin temperature. Then, three mixing speeds were applied: 460, 1170 and 2500 rpm. The analyses of the obtained results showed that the most effective tensile results were obtained in the case of mixing with the use of a dispersing disc mixer with preliminary heating of the epoxy resin to 50 °C and deaeration of the composition during mixing. The highest tensile strength of adhesive compositions was obtained at the highest mixing speed; however, the best repeatability of the results was observed at 1170 rpm mixing speed. Based on a comparison test of average values, it was observed that, in case of modified compositions, the values of average tensile strength obtained at mixing speeds at 1170 and 2500 rpm do not differ significantly with the assumed level of significance α = 0.05.

Evaluation of natural and epoxidized vegetable oil in elastomeric compositions for tread rubber

2021 ◽  
pp. 009524432110386
Author(s):  
Camila Taliotto Scarton ◽  
Nayrim Brizuela Guerra ◽  
Marcelo Giovanela ◽  
Suélen Moresco ◽  
Janaina da Silva Crespo
Keyword(s):  
Mechanical Properties ◽  
Stearic Acid ◽  
Natural Rubber ◽  
Soybean Oil ◽  
Vegetable Oil ◽  
Epoxidized Soybean Oil ◽  
Natural State ◽  
Vegetable Soybean ◽  
Tire Industry ◽  
Petroleum Derivatives

In the tire industry, the incorporation of natural origin oils in the development of elastomeric formulations has been one of the alternatives to reduce the use of petroleum derivatives, with a high content of toxic compounds. In this work, soybean vegetable oil was investigated as a lubricant and co-activator in sulfur-vulcanized natural rubber compounds. The soybean oil was used in its natural state and chemically modified by the epoxy ring’s introduction in its structure. In an internal mixer a standard formulation of natural rubber, five formulations replacing a conventional aromatic oil and stearic acid by vegetable oil, and a formulation without an activation system were prepared. The natural and epoxidized soybean oil was characterized chemically, and the elastomeric compositions were evaluated by mechanical and rheological analysis. The mechanical properties showed satisfactory results when vegetable soybean oil was used as a lubricant and could be a substitute for conventional aromatic oils, thus guaranteeing reduction of aromatic polycyclic content in the formulations. The crosslink degree and the rheological characteristics of the samples prepared with vegetable soybean oil were similar to the natural rubber standard sample. The formulations without the zinc oxide and stearic acid evidenced the need for activators in the vulcanization reaction, as they presented properties below standard. We verified that the epoxidized soybean oil, even when promoting better dispersion of the fillers, interfered in the crosslink formation, and consequently there was a decrease in the mechanical properties of these formulations. Finally, we indicated vegetable soybean oil as a substitute for aromatic oil and stearic acid, in the elastomeric compositions used to manufacture treads.

scholarly journals Enhancement of the Thermomechanical Properties of a Fly Ash- and Carbon Black-Filled Polyvinyl Chloride Composite by Using Epoxidized Soybean Oil as a Secondary Bioplasticizer

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Toan Duy Nguyen ◽  
Chinh Thuy Nguyen ◽  
Van Thanh Thi Tran ◽  
Giang Vu Nguyen ◽  
Hai Viet Le ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Carbon Black ◽  
Soybean Oil ◽  
Young’S Modulus ◽  
Polyvinyl Chloride ◽  
Young's Modulus ◽  
Epoxidized Soybean Oil ◽  
Melt Mixing ◽  
Elongation At Break

Plasticized polyvinyl chloride (PVC) was fabricated using epoxidized soybean oil (ESBO) as a secondary bioplasticizer with dioctyl phthalate (DOP). The PVC/MFA/CB composites were prepared by melt mixing of the plasticized PVC with modified fly ash (MFA), carbon black N330 (CB), and polychloroprene (CR) in a Haake Rheomix mixer using a rotation speed of 50 rpm at 175°C for 6 min and then compressed by Toyoseiki pressure machine under 15 MPa. The effect of ESBO content on morphology, melt viscosity, tensile properties, and flame retardancy of PVC/MFA/CB composites was investigated. The obtained results showed that the incorporation of ESBO has significantly enhanced the processing ability, Young’s modulus, tensile strength, and elongation at break of the PVC/MFA/CB composites. The torque of PVC/MFA/CB composites was increased to approximately 12% when 50 wt% of DOP was replaced by ESBO. When ESBO was 20 wt% in comparison with DOP weight, the elongation at break, tensile strength, and Young’s modulus of the composites were increased to 48%, 24%, and 4.5%, respectively. Correspondingly, thermogravimetric analysis results confirmed that ESBO had improved the thermostability of the PVC composites. The ESBO have potential as a secondary bioplasticizer replacement material for DOP owing to their better thermomechanical stability.

Sign in / Sign up

Export Citation Format

Share Document