Evaluation of mechanical properties of poly (methyl methacrylate) reinforced with glass fibers

Abstract

Introduction. Acrylic resin is a basic material used in preparation of partial and complete dentures. One of the methods of improving mechanical properties of removable dentures is reinforcing acrylic resin with artificial fibers. Aim of the study. To compare mechanical properties of acrylic material reinforced with various types of glass fibers. Material and method. Heat-cured Estetic acrylic resin by Wiedent was used for denture bases. Glass mat, fiberglass fabric, long glass fibers and short glass fibers were used as reinforcing phase of the acrylic resin. In total, forty specimens were prepared, of which eight samples were controls. Research samples consisted of four groups of eight specimens each. Mechanical examinations in three-point bending test were conducted by means of the Zwick 1435 universal testing machine. Results. Specimens reinforced with short glass fibers achieved the highest values of maximum bending force (105.7 ± 8.9 N). It corresponded to the highest values of bending strength (126.8 ± 10.7 MPa). The lowest strength was found for specimens reinforced with glass mat (82.8 ± 11.8 MPa). The highest value of Young’s modulus was obtained for the samples reinforced with fiberglass fabric (3.7 ± 0.8 GPa). The highest values of deflection at maximum bending force were found for the samples reinforced with long glass fibers (4.0 ± 0.6 mm). Conclusions. The highest bending strength parameters were found for specimens reinforced with short and long glass fibers. Short glass fibers are better at improving mechanical properties of acrylic resin than long glass fibers.

Mechanical strength evaluation of poly(methyl methacrylate) reinforced with long glass, carbon and aramid fibers

“…Vallittu et al [14][15][16] demonstrated in their numerous researches that the reinforcement of the palatal plate using a single glass fiber layer causes strength increase by 5 %. Our earlier tests also confirmed small strength improvement, as a result of the use of glass fibers [10].…”

“…There are nume rous forms of glass fibers that are used as reinforcement of acrylic plates of removable dentures, however, as demonstrated in our earlier tests, the best strength para meters were achieved with the use of long fibers [10]. The results of the acrylic compound reinforcement method using glass fibers were positive in numerous tests [9][10][11][12][13]. Vallittu et al [14][15][16] demonstrated in their numerous researches that the reinforcement of the palatal plate using a single glass fiber layer causes strength increase by 5 %.…”

“…The use of glass fibers to reinforce resins opened new possibilities of acrylic compound reinforcement [9]. There are nume rous forms of glass fibers that are used as reinforcement of acrylic plates of removable dentures, however, as demonstrated in our earlier tests, the best strength para meters were achieved with the use of long fibers [10]. The results of the acrylic compound reinforcement method using glass fibers were positive in numerous tests [9][10][11][12][13].…”

Short glass fiber reinforced polymer concrete with addition of waste cathode-ray tube (CRT) glass

“…This proves that two effects caused by the presence of fi bers are "competing": the reinforcing effect of carrying loads through the fi bers and the weakening (in the case of compression) of the above-mentioned effect of the structure orientation. Instability of the compressive mechanical properties for composites containing chopped glass fi bers is common (49,50).…”