An experimental study of mechanical properties and heat transfer of acrylic composites with structural and surface modified Al2O3 particles

Vanja Malisic,Slavisa Putic,Zoran Stevic,Bojana Balanc,Radmila Jancic-Heinemann,Aleksandar Marinkovic,Marija Vuksanovic,Natasa Tomic

doi:10.2298/sos2004457m

Vanja Malisic, Slavisa Putic + Show 6 more

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https://doi.org/10.2298/sos2004457m

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Abstract

Thermal properties of acrylate-based composite combined with alumina-based particles were investigated. The composites were made of poly (methyl methacrylate) (PMMA) modified with dimethyl itaconate (DMI) as a matrix. Neat alumina particles (Al2O3) and alumina doped with iron oxide (Al2O3-Fe) modified with 3-aminopropyl-trimethoxylane (AM) and flax oil fatty acid methyl esters (biodiesel - BD) were used as reinforcement. Thermal conductivity measurements showed that composite with alumina particles with the highest alpha phase content had the highest thermal conductivity values. Mechanical properties (tensile strength, modulus of elasticity and elongation at break) were improved by the addition of modified alumina particles to PMMA/DMI matrix. The thermal properties are the most improved for composite with 3 wt.% Al2O3-Fe-AM particles that had the lowest temperature in a crack zone was noticed (10.28 %) compared to PMMA added due to the better stiffness and highest thermal conductivity.

Highlights

(methyl methacrylate) (PMMA) is a transparent and tough plastic material that has wide application in areas where material transparency is important
The preparation of PMMA is composed of the two-component system: the first one is a liquid component-methyl methacrylate (MMA) as a monomer and ethylene glycol dimethacrylate (EGDMA) as a modifier, and the second is a powder component-prepolymerized PMMA coated with dibenzoyl peroxide as the initiator
The results suggest that the composites reinforced with particles having AM surface modification show better compatibility in the PMMA/dimethyl itaconate (DMI) matrix particles with BD

Summary

Introduction

(methyl methacrylate) (PMMA) is a transparent and tough plastic material that has wide application in areas where material transparency is important. Inert in the human body, PMMA has shown good biocompatibility. Good mechanical properties retain for a long time. It is used to create denture bases [1], bone cement [2], contact lenses, inhalers [3,4]. It is important to note that PMMA has certain insufficiencies. Potential distortions of residual monomer [5,6,7] and limitations concerning mechanical properties, especially in terms of modulus of elasticity, impact, fatigue or flexural strength [8,9], might appear as a result of these deficiencies. In a case of diffusion, the residual monomer can leach out from the material and irritate the surrounding tissue.

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