
handle: 11012/30907
Táto diplomová práca za zaoberá štúdiom krátkovláknových kompozitov pre stomatologické aplikácie. Do matrice na báze dimetakrylátov bolo pridané časticové bárnaté plnivo, krátke polyakrylonitrylové vlákna alebo krátke sklenené vlákna a bol skúmaný ich vplyv na vlastnosti kompozitného materiálu. Použitými metódami na charakterizáciu kompozitných materiálov boli termogravimetrická analýza (TGA), diferenčná kompenzačná fotokalorimetria (DPC), dynamicko-mechanická analýza (DMA), ohybová skúška v trojbodovom usporiadaní, rastrovacia elektrónová mikroskopia (SEM) a konfokálna laserová mikroskopia (CLSM). Vytvrdzovanie matrice bolo charakterizované teplom polymerácie, stupňom konverzie a polymeračnou rýchlosťou. U testovaných vzoriek boli zistené teplota skelného prechodu, dynamický modul pri teplotách 35 °C a 100 °C, modul pružnosti, pevnosť, kritická hodnota faktoru intenzity napätia, kritická hodnota rýchlosti uvoľňovania energie a bola sledovaná morfológia lomových plôch.
This diploma thesis deals with short-fibre reinforced composites for dental applications. Particulate barium filler, short polyacrylonitryle fibres or short glass fibres were added to the dimethacrylate matrix to study their effect on the composite material properties. Methods used for this study were thermogravimetric analysis (TGA), differential compensation photocalorimetry (DPC), dynamic mechanical analysis (DMA), three point bending, scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM). The matrix curing was defined by heat of polymerisation, degree of conversion and polymerisation rate. Composite materials were characterized by the glass transition temperature, storage moduli at 35 °C and 100 °C, elastic modulus, strength, the critical value of stress intensity factor and the critical value of energy release rate. Fracture surface investigation is also included in this thesis.
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krátke vlákna, dentálne materiály, dental materials, short fibers, kompozitný materiál, composite material, lomová húževnatosť, fracture toughness
krátke vlákna, dentálne materiály, dental materials, short fibers, kompozitný materiál, composite material, lomová húževnatosť, fracture toughness
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