Uticaj načina ostvarivanja veze između ojačanja i matrice u kompozitu na bazi akrilata i čestica aluminijum-oksida na adheziona i mehanička svojstva kompozita

Production engineering is a combination of manufacturing technology, engineering sciences. A production engineer typically has a wide knowledge of engineering practices and is aware of challenges related to production. In addition to this the materials science combines the properties, production methods and structure of materials and creates the matrix of knowledge that enables the successful design of a material. This thesis was oriented to synthesis and characterisation of a polymer matrix composite using specific ceramic particles...Proizvodno mašinstvo je kombinacija proizvodne tehnologije i injženerskih nauka. Proizvodni inženjer obično ima široko znanje o inženjerskim praksama i svestan je izazova vezanih za proizvodnju. Pored ovoga, nauka o materijalima kombinuje svojstva, načine pripreme i strukturu materijala i stvara matricu znanja koja omogućava uspešno oblikovanje materijala. Ova doktorska disertacija bila je orijentisana na sintezu i karakterizaciju polimerno matričnog kompozita korišćenjem specifičnih keramičkih čestica

Uticaj načina ostvarivanja veze između ojačanja i matrice u kompozitu na bazi akrilata i čestica aluminijum-oksida na adheziona i mehanička svojstva kompozita

Production engineering is a combination of manufacturing technology, engineering sciences. A production engineer typically has a wide knowledge of engineering practices and is aware of challenges related to production. In addition to this the materials science combines the properties, production methods and structure of materials and creates the matrix of knowledge that enables the successful design of a material. This thesis was oriented to synthesis and characterisation of a polymer matrix composite using specific ceramic particles...Proizvodno mašinstvo je kombinacija proizvodne tehnologije i injženerskih nauka. Proizvodni inženjer obično ima široko znanje o inženjerskim praksama i svestan je izazova vezanih za proizvodnju. Pored ovoga, nauka o materijalima kombinuje svojstva, načine pripreme i strukturu materijala i stvara matricu znanja koja omogućava uspešno oblikovanje materijala. Ova doktorska disertacija bila je orijentisana na sintezu i karakterizaciju polimerno matričnog kompozita korišćenjem specifičnih keramičkih čestica

The influence of alumina particle modification on the adhesion of the polyacrylate matrix composite films and the metal substrate

Adhesion behavior between the composite films, consisting of UV cured Bis-GMA (Bisphenol A glycidylmethacrylate)/TEGDMA (triethylene glycol dimethacrylate) as a matrix and the ferrous oxide doped alumina particles, Al2O3 Fe, modified with 3-aminopropyl)tri - methoxysilane (AM) and methyl esters of linseed oil fatty acids (biodiesel - BD) used as a reinforcement, and metallic surface was investigated in this study. Al2O3 Fe-BD particles showed pronounced hydrophobicity and hydrolytic stability of alumina surface. Adhesive and mechanical properties of prepared composites, containing 0.5, 1.5 and 3 wt. % of surface modified Al2O3 Fe-AM and Al2O3 Fe-BD particles, were compared to the neat polymer matrix. Adhesion parameter was evaluated using the micro hardness testing method. The comparison of determined contact angle with adhesive parameter, obtained from micro hardness measurements, was discussed in relation to structural effect of reinforcement used

Optimization of modifier deposition on the alumina surface to enhance mechanical properties and cavitation resistance

Composites based on poly(methyl methacrylate), dimethyl itaconate matrix and alumina particles were prepared. Ferrous oxide-doped alumina particles (Al2O3Fe) and commercial alumina nanoparticles (Al(2)O(3)n) modified with (3-aminopropyl)trimethoxysilane (AM) and methyl esters of linseed oil fatty acids (biodiesel-BD) were used as reinforcement. The mechanical properties of the prepared composites, containing 1, 3 and 5 wt% of surface-modified alumina particles, are compared to a neat polymer matrix. The particles were characterized by single-beam Fourier transform infrared spectroscopy, thermogravimetry and differential scanning calorimetry. The mechanical properties of the composites were determined by micro-Vickers hardness and impact testing. The morphology of the surface of the composites exposed to cavitation was observed through a field emission scanning electron microscope. AFM analysis was used to compare surface features seen using the SEM and to interpret the surface degradation properties. The hardness, cavitation resistance and high-impact energy resistance of the composites are better in the case of AM surface modification of alumina fillers, but biodiesel modified particles have comparable mechanical properties and a stabilized Al-O-Si bond that could be important when a composite is exposed to humidity or a wet environment