Dynamic mechanical analysis of provisional resin materials reinforced by metal oxides

Korkmaz, T
Doan, A
Usanmaz, Ali
In this study, several provisional resin materials were investigated by dynamic mechanical analysis (DMA). The materials were autopolymerized PMMA and PEMA, light cured PMMA. Autopolymerized PMMA has the highest T-g (131 degrees C) compared to that of the autopolymerized PEMA (102 degrees C) and light cured PMMA (120 degrees C). The storage moduli for autopolymerized PMMA, autopolymerized PEMA and light cured PMMA are 2.9, 1.8 and 2.3 GPa, respectively. The loss moduli of the same resins are 330, 300 and 350 MPa, respectively. Each of these resins were reinforced with 1%, 3% and 5% of each of metal oxides of MgO, ZrO2 and Al2O3 and then studied with DMA. Small changes were observed for dynamic mechanical properties tested. However, the changes are not systematic and noticeable. This is most probably due to smaller size of metal oxides particles compared to that of polymer particle size.


Transient dynamic response of viscoelastic cylinders enclosed in filament wound cylindrical composites
Şen, Özge; Turhan, Doğan; Department of Engineering Sciences (2005)
In this study, transient dynamic response of viscoelastic cylinders enclosed in filament wound cylindrical composites is investigated. Thermal effects, in addition to mechanical effects, are taken into consideration. A generalized thermoelasticity theory which incorporates the temperature rate among the constitutive variables and is referred to as temperature-rate dependent thermoelasticity theory is employed. This theory predicts finite heat propagation speeds. The body considered in this thesis consists o...
Numerical and experimental investigaton of ultrasonic embossing technique for fabrication of thermoplastic microfluidic devices
Çoğun, Ferah; Arıkan, Mehmet Ali Sahir; Yıldırım, Ender; Department of Mechanical Engineering (2018)
In this study, numerical models and experimental results were presented to describe mechanisms of hot embossing (HE) and ultrasonic embossing (UE) for fabrication of thermoplastic microfluidic chips. The substrates were embossed using micromilled aluminum molds in both techniques. Effects of embossing temperature, time, and force on performance outputs (replication rates and channel symmetry) were investigated numerically and experimentally in HE. Experimental results revealed the importance of temperature ...
Process characterization of composite structures manufactured using resin impregnation techniques
Miskbay, Adem Onur; Parnas, Kemal Levend; Department of Mechanical Engineering (2009)
The aim of this study is to investigate and compare the properties of two layer carbon epoxy composite plates manufactured using various resin impregnation techniques; Resin Transfer Molding (RTM), Light RTM (LRTM), Vacuum Assisted RTM (VARTM) and Vacuum Packaging (VP). Throughout the study a different packaging method was developed and named Modified Vacuum Packaging (BP). The mechanical properties of composite plates manufactured are examined by tensile tests, compressive tests, in-plane shear tests and t...
Bond strength and failure analysis of lining materials to denture resin
Aydin, AK; Terzioglu, H; Akinay, AE; Ulubayram, K; Hasırcı, Nesrin (1999-05-01)
Objectives: This study was conducted to investigate the bonding properties of five lining materials to a denture base resin. Two hard (chemical-cured resin: Kooliner "Coe Labs, USA" and light-cured VLC resin: Triad "Dentsply, USA") and three soft (chemical-cured resin: Express "Alcos,-USA", heat-temperature vulcanized 'HTV' silicone material: Molloplast-B "Regneri GmbH, Germany" and room-temperature vulcanized 'RTV' silicone material:Ufi Gel-P "Voco,Germany") liners were used.
Investigation on replication of microfluidic channels by hot embossing
Yıldırım, Ender; Arıkan, Mehmet Ali Sahir (2017-01-01)
In this study, effects of embossing temperature, time, and force on production of a microfluidic device were investigated. Polymethyl methacrylate (PMMA) substrates were hot embossed by using a micromilled aluminum mold. The process parameters were altered to observe the variation of replication rate in width and depth as well as symmetry of the replicated microfluidic channels. Analysis of variance (ANOVA) on the experimental results indicated that embossing temperature was the most important process param...
Citation Formats
T. Korkmaz, A. Doan, and A. Usanmaz, “Dynamic mechanical analysis of provisional resin materials reinforced by metal oxides,” BIO-MEDICAL MATERIALS AND ENGINEERING, pp. 179–188, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55918.