材料科学
艾氏冲击强度试验
丙烯酸树脂
抗弯强度
压痕硬度
复合材料
维氏硬度试验
聚合
二氧化钛
极限抗拉强度
聚合物
微观结构
涂层
作者
Mohamed Ashour Ahmed,M. El-Shennawy,Yousef Al-Thomali,Adel A. Omar
出处
期刊:World Journal of Nano Science and Engineering
[Scientific Research Publishing, Inc.]
日期:2016-01-01
卷期号:06 (03): 111-119
被引量:58
标识
DOI:10.4236/wjnse.2016.63011
摘要
The aim of this study is to clarify the effect of different concentrations of titanium dioxide nanoparticles (Nps) on the properties of two types of heat polymerized acrylic resin.The tested parameters were flexural strength, impact strength, and microhardness.The two types of acrylic resin used in this study were conventional unmodified (Implacryl, Vertex) and high impact heat polymerized acrylic resin (Vertex-Dental, Netherlands).Both types of acrylic resin were modified by using 1% and 5% TiO2 Nps powder.Specimen's dimensions were prepared according to the American Dental Association Specification No. 12. Three types of specimens were prepared: 1) flexural strength specimens 50 mm × 10 (±0.2) mm × 3 (±0.2) mm, 2) impact strength test specimens 60 mm × 6.0 mm × 4.0 mm, 3) microhardnesss specimens 25 mm × 10 mm × 3 (±0.2) mm.For each test 6 groups were prepared (each group containing 5 samples).Thirty specimens were prepared in each of the three tests, amounting to a total number of 90 specimens.Mechanical properties such as flexural strength (FS), impact strength and microhardness of the above mentioned specimens were determined using universal testing machine, Izod pendulum impact testing machine and Vickers microhardness tester, respectively.ISO Specification No. 1567 was followed in microhardness test.The data was collected and statistically analyzed.Flexural strength considerably decreased by increasing TiO2 concentration in both types of acrylic resin.Impact strength of the conventional acrylic resin modified by 1% of additives significantly increased.The microhardness is significantly increased by addition of 5% of TiO2 Nps.The Incorporation of TiO2 nanoparticles into acrylic resins can adversely affect its flexural strength.Meanwhile, the impact
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