Mechanical and thermal characterization of laminar carbon/epoxy composites modified with magnesium oxide microparticles

Abstract

This paper investigates the effects of magnesium oxide (MgO) microparticles on the mechanical and thermal properties of laminated carbon fiber reinforced polymer composites. The polymer epoxy matrix was modified with 0% (pure), 2 wt%, and 4 wt% MgO fillers. Then the laminar composites were manufactured with the vacuum bag method. The energy absorption capacity and impact strength were determined from the Charpy impact tests, whereas the flexural characteristics were evaluated by conducting three-point bending experiments. Scanned electron microscopy was used to examine both the dispersion of microparticles and the fracture surface of experimentally tested specimens. Thermal performance of the polymer composites with and without MgO additives was analyzed comparatively by performing the thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The decomposition temperatures and glass transition temperatures of the composites were obtained. Approximately 30% increment in impact strength was achieved thanks to the MgO fillers. However, although the flexural strength decreased since the MgO particles caused stress concentration, the flexural modulus was not affected due to the decrease of elongation at break. The TGA and DSC instrumentations showed that the decomposition temperatures increased, and curing behaviors were improved depending upon the MgO content.

Modification of the Dielectric and Thermal Properties of Organic Frameworks Based on Nonterminal Epoxy Liquid Crystal with Silicon Dioxide and Titanium Dioxide

“…In [16], it was shown that the addition of TiO 2 significantly changes the properties of the mixture, and a detailed description of this interaction was given depending on the size of the modifier, while in [17], SiO 2 was used to modify the electro-optical properties of polymer-dispersed liquid crystals. Metal oxides are also used to improve thermal and mechanical properties in epoxy composites, including epoxy compounds with mesogenic units [18][19][20]. Additionally, titanium dioxide is known for its photocatalytic activity and protective properties against the degradative effects of weather conditions, especially UV radiation [21][22][23].…”

Production of different metal oxide nanoparticle embedded polymer matrix composite structures by the additive manufacturing technology and investigation of their properties

“…Many researchers have used metal oxide nanoparticles as additives in polymers because of their excellent properties. [ 1–6 ] Fe 2 O 3 , ZnO, NiO, Al 2 O 3 , TiO 2 , and MgO effects the positive direction of the magnetic, ultraviolet light absorption, electrochemical properties, fracture toughness, modulus of elasticity, and dielectric properties, respectively. Polymer nanocomposites are used in many applications, such as energy systems, biomechanics, aviation, [ 7 ] civil construction, automotive, [ 8 ] anti‐corrosion coating, and high voltage fields.…”

Evaluation of tensile properties on glass/carbon fiber epoxy pure, interply, and locally nested intraply hybrid composites

“…Fiber-reinforced epoxy matrix composite materials are increasingly used in areas such as aerospace, automotive, marine, and so forth. [1][2][3][4][5] Various fiber reinforcements such as glass and carbon are selected in accordance with the usage areas. Carbon fiber reinforced polymer (CFRP) composites show better strength properties but are more expensive than glass fiber reinforced polymer (GFRP) composites.…”