scholarly journals Chemical resistance of biopolymers based on the epoxy resin modified with epoxidised and cyclocarbonated soybean oils

2021 ◽  
Keyword(s):  
Epoxy Resin ◽  
Chemical Resistance ◽  
Soybean Oils

Utilization of Waste Packaging Glass as Progressive Filler in Polymer Anchor Material Based on Epoxy Resin

2019 ◽  
Vol 887 ◽  
pp. 40-47
Author(s):  
Tomáš Žlebek ◽  
Jakub Hodul ◽  
Rostislav Drochytka
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Epoxy Resin ◽  
High Strength Concrete ◽  
Chemical Resistance ◽  
Negative Impact ◽  
High Strength ◽  
Pull Out ◽  
Pull Out Strength ◽  
Packaging Glass

The work deals with the use of waste glass to the polymer anchor material based on epoxy resin, primarily for anchoring to a high strength concrete (HSC). The main aim was to use the largest possible amount of the waste packaging glass by reducing the amount of epoxy resin, which is an expensive material and its production has a negative impact on the environment. Within the experimental verification, the influence of waste packaging glass fraction 0–0.63 mm on the final properties of the polymer anchoring material was observed. To determine the optimal formulation compressive strength, flexural strength, chemical resistance, shrinkage and pull-out test were performed. Based on the evaluation of the results the optimal percentage of filling was determined, when the polymer anchor material showed high strengths, minimal shrinkage, good chemical resistance, optimal consistency for anchoring into the HSC and high anchor bolt pull-out strength.

The Effects of Chemical Resistance for Nanocomposite Materials via Nano-Silica Addition into Glass Fiber/Epoxy

2013 ◽  
Vol 853 ◽  
pp. 28-33
Author(s):  
Huey Ling Chang ◽  
Chih Ming Chen ◽  
Kung Liang Lin ◽  
Bor Kae Chang
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Glass Fiber ◽  
Epoxy Resin ◽  
Storage Modulus ◽  
Chemical Resistance ◽  
Dynamic Mechanical Properties ◽  
Silica Nanopowder

Nanocomposite samples containing epoxy resin, glass fiber and 0~2 wt.% SiO2 nanopowder are prepared. The effects of SiO2 addition on the chemical resistance, glass transition temperature (Tg) and dynamic mechanical properties of the various samples are then observed. The chemical resistance of the nanocomposite specimens is compared with that of pure glass fiber/epoxy composite specimens when tested in acetone. The results show that the addition of 2 wt.% SiO2 increases the value of storage modulus by 1646MPa compared to that of the sample containing no silica nanopowder. Following immersion in acetone, all the nanocomposite specimen storage modulus decreased, but the addition of SiO2 reduced the decline, where the 2 wt. % samples decrease from 11.76% reduction to 0.84% and no significant change in the Tg compared to that of the sample with no silica nanopowder. Therefore, the experimental results indicate that 2 wt.% SiO2 addition is beneficial in improving chemical resistance, glass transition temperature, and dynamic mechanical properties of epoxy resin / glass fiber nanocomposites.

Comparative studies on carbon fiber reinforced composites based on trifunctional epoxy resin and commercial epoxy resin

2020 ◽  
pp. 096739112096751
Author(s):  
Mahendrasinh Raj ◽  
Lata Raj ◽  
Jaykumar Maheta ◽  
Smit Patel
Keyword(s):  
Epoxy Resin ◽  
Chemical Resistance ◽  
Average Molecular Weight ◽  
Matrix Material ◽  
Diglycidyl Ether ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Weight Average Molecular Weight ◽  
Carbon Fiber Reinforced Composites ◽  
Ft Ir

The present work focuses on comparative properties of β-naphthol based trifunctional epoxy resin and commercial epoxy resin. Reaction of β-naphthol, formaldehyde and epichlorohydrin forms trifunctional epoxy resin. β-Naphthol based trifunctional epoxy resin characterized by FT-IR, elemental analysis (C, H, N, O analyzer), epoxy equivalent weight (EEW), weight average molecular weight [Formula: see text], viscosity, rise in viscosity, hydrolysable chlorine content and volatile content. β-Naphthol based trifunctional epoxy resin cured by five different hardeners and used as matrix material for carbon reinforced composites. Composites were characterized by their mechanical properties, chemical resistance and thermal properties. Results showed excellent chemical and thermal resistance. All results were compared against commercially available epoxy resin (Diglycidyl ether of bisphenol-A based epoxy resin having EEW of 400). Results showed that β-naphthol based trifunctional epoxy resin was superior than commercial epoxy resin.

Chemical Resistance of Concrete-Polymer Composites – Comparison Based on Experimental Studies

2015 ◽  
Vol 1129 ◽  
pp. 123-130 ◽  
Author(s):  
Tomasz Piotrowski ◽  
Piotr Gawroński
Keyword(s):  
Compressive Strength ◽  
Mass Loss ◽  
Epoxy Resin ◽  
Polymer Composites ◽  
Chemical Resistance ◽  
Experimental Studies ◽  
Polymer Concrete ◽  
Cement Concrete ◽  
Ordinary Concrete ◽  
Synthetic Latex

One of the main advantage of Concrete-Polymer Composites (C-PC) in relation to Cement Concrete called Ordinary Concrete is its chemical resistance. There is no European standard for testing the chemical resistance of cement based concretes and C-PC. American standards ASTM provide varied concrete tests depending on exposure conditions and mechanisms of destruction of concrete structures but there is a lack of clear criteria for the evaluation of research results by these methods. There are also requirements for monolithic floors chemical resistance - ASTM C722-04 and the requirements of the standard EN 1504-2, but they involve coating materials and cannot be directly applied to the cement concrete and C-PC. The paper presents the experimental studies of chemical resistance of C-PC in relation to OC. The investigations has been made under different environment conditions. First the samples of Ordinary Concrete (OC), Polymer Concrete (PC-1) based on vinylester resin and Polymer-Cement Concrete (PCC-1) with polyacrylic dispersion used as a co-binder were immersed for a period of time up to 168 days in a distilled water, H2SO4, MgSO4, (NH4)2SO4 and mix of the mentioned. During the storage the pH was controlled. Additionally as a reference the samples were conditioned in a climate chamber (20°C, 60% RH). The compressive strength were tested after defined periods of time. Next experiment was performed on OC and three different PCC – first modified with synthetic latex, second with polyacrylic polymer dispersion and the last with epoxy resin. The samples were immersed in H2SO4 up to 90 days. Compressive strength and mass loss after 30 and 90 days of conditioning were measured. As a reference the water immersion was used. The results obtained in this experimental program showed high chemical resistance of Polymer Concrete. PC samples obtained continuous increases of compressive strength in all examined chemically aggressive environments. It is also confirmed higher chemical resistance of Polymer-Cement Concrete modified with vinylester resin in relation to Ordinary Concrete. The second part of the program showed that the best additive to PCC among poliacrylic dispersion, synthetic latex and epoxy resin was last one. Epoxy modified PCC samples obtained best results both in compressive strength and mass loss tests

Precision Parts Are Cast From Epoxy Resin Systems

CORROSION ◽  
1960 ◽  
Vol 16 (1) ◽  
pp. 9-12
Keyword(s):  
Physical Properties ◽  
Epoxy Resin ◽  
Chemical Resistance ◽  
Modified Epoxy ◽  
Epoxy Systems

Abstract Briefly discusses physical properties and chemical resistance of basic epoxy systems. Also includes modified epoxy systems and laminated epoxy systems. Gives manufacture procedures for casting precision parts and lists some applications. 6.6.8

Glass Fiber Reinforced Composites of Coloured Epoxy Resin Cured with Different Amines

2002 ◽  
Vol 10 (6) ◽  
pp. 441-446
Author(s):  
Milan R. Patel ◽  
Manish P. Patel ◽  
Rashmika H. Patel ◽  
Ranjan G. Patel
Keyword(s):  
Thermal Stability ◽  
Epoxy Resin ◽  
Chemical Resistance ◽  
The Novel ◽  
Reinforced Composites ◽  
Scanning Calorimetry ◽  
Good Thermal Stability ◽  
Glass Fiber Reinforced ◽  
Fibre Composites ◽  
Thermal Stability Of

A novel coloured epoxy resin has been synthesized by reaction between epichlorohydrin and bisazodiol. The curing of the resin, blended with a DGEBA resin, were characterized by differential scanning calorimetry (DSC). The thermal stability of the cured products has been investigated by thermogravimetric analysis (TGA). The cured products showed good thermal stability. Glass fibre composites were fabricated by blending a DGEBA resin and the novel coloured epoxy resin and their mechanical properties, electrical properties and chemical resistance were studied.

scholarly journals Influence of cellulose particles on chemical resistance, mechanical and thermal properties of epoxy composites

2020 ◽  
Keyword(s):  
Epoxy Resin ◽  
Chemical Resistance ◽  
Chemical Properties ◽  
Mechanical And Thermal Properties ◽  
Physical And Chemical Properties ◽  
Plant Materials ◽  
Physical And Chemical ◽  
Thermal Stability Of ◽  
Modified Cellulose ◽  
And Chemical Properties

Background: The technological developments for nanocellulose production from cheaper plant materials compared to wood, in particular, agricultural waste is an urgent task of nanobiophysics. The discovery of possibility of expanding the functional characteristics of materials in compositions with modified cellulose particles essentially stimulated the interest of researchers in cellulose composites. Surface modification of cellulose particles by functional materials, such as dyes, metal oxides, silicon, allows applying composites with modified cellulose in various areas of modern industry. A significant improvement in the operational performances of functionalized cellulose particles can be achieved by using them as filler in polymers. Epoxy resin compositions with modified and unmodified cellulose particles, studied in present work, are an example of hybrid biosystem. The interfacial interaction of filler particles with the epoxy matrix, their concentration and dispersion can change the physical and chemical properties of the biopolymer and the functional parameters of biocomposites. Studying the influence of external fields on the physical and chemical properties of epoxy resin-based biosystems and their influence on operational parameters seems to be an urgent problem of advanced and sustained materials science. Objectives: The purpose of this work was to develop an effective nanocellulose synthesis from plant materials and surface functionalization of micro- and nanocellulose particles with clathrochelate iron (ΙΙ) dye as well obtaining biocompositions of epoxy resin with functionalized and non-functionalized micro- and nanocellulose, and to explore of the morphology, chemical resistance, mechanical and thermal properties of epoxy composites with cellulose micro and nanoparticles. Materials and methods: The studying objects were the composites of epoxy resin Eposir-7120 with a polyethylene polyamine “PEPA” hardener in a ratio of 6.2:1 and 10% cellulose micro and nanoparticles. The microcellulose obtained from wood has been a commercial product. Nanocellulose has been synthesized from organosolv cellulose obtained from Miscanthus x giganteus stalks. Surface modification of micro- and nanocellulose was performed using the clathrochelate iron (ΙΙ) dye. The specific surface area of cellulose particles was determined using low-temperature nitrogen adsorption-desorption according to the Brunauer-Emmett-Teller method. Mechanical parameters were determined using universal Shopper and UMM-10 machines. Thermal analysis was performed using Q1500 analyzer. Swelling was determined by the gravimetric method. Results: Elastic modulus E, compressive strength σ and thermogravimetric parameters were determined. It was shown that in composites with micro and nanocellulose the E rises in 7.0–12.2% while the σ increases in 9.1% for composites with cellulose micro particles. The loading resin with nanocellulose and modified cellulose microparticles no affects the σ value of composites. The thermal stability of epoxy polymer (310°C) reduces after loading with micro and nanocellulose to 290 and 300°C, respectively. Chemical resistance of composites with both celluloses to 20% nitric acid reduces. In neutral medium swelling characterizes by rapid sorption to saturation of 15–20% acetone in 36 hours. Conclusions: Thus, the synthesis method of nanocellulose from plant materials and functionalization of its surface with clathrochelate iron (ΙΙ) were developed. Light response of dye was detected in visible spectral range. Epoxy resin composites with 10% micro and nanocellulose were obtained. The filling effect with micro- and nanocellulose at elastic modulus, compressive strength, and thermal stability of epoxycomposites was studied. The swelling processes run similarly in composites with cellulose micro and nanoparticles.

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