Pub Date : 2017-08-31DOI: 10.4172/2169-0022.1000370
Jawad K. Oleiwi, S. Salih, H. S. Fadhil
The research investigated to determine enhancement in the tensile properties of self-cure acrylic resin reinforced with siwak fiber and bamboo fibers which were cut into 2, 6, and 12 mm lengths and used at three different concentrations of (3, 6, and 9 wt.%). The mixture of resin and fiber were cured at 2.5 bar and 55°C in a water bath for 30 min. The cured resin specimen tested for tensile properties (tensile strength, young modulus, elongation percentage at break) following the specification of ASTM No. 638. The results illustrated that the tensile strength and young modulus tended to be improved with fiber length and concentration, the largest values of tensile strength and young modulus for specimens reinforced with bamboo fibers are (72.4 MPa and 5.208 GPa) while for specimens reinforced with siwak fibers are (71 MPa and 4.9 GPa) at optimum condition of weight fraction (9%) and fiber length (12 mm) which was significantly higher than other formulations.
{"title":"Effect of Siwak and Bamboo Fibers on Tensile Properties of Self-Cure Acrylic Resin Used for Denture Applications","authors":"Jawad K. Oleiwi, S. Salih, H. S. Fadhil","doi":"10.4172/2169-0022.1000370","DOIUrl":"https://doi.org/10.4172/2169-0022.1000370","url":null,"abstract":"The research investigated to determine enhancement in the tensile properties of self-cure acrylic resin reinforced with siwak fiber and bamboo fibers which were cut into 2, 6, and 12 mm lengths and used at three different concentrations of (3, 6, and 9 wt.%). The mixture of resin and fiber were cured at 2.5 bar and 55°C in a water bath for 30 min. The cured resin specimen tested for tensile properties (tensile strength, young modulus, elongation percentage at break) following the specification of ASTM No. 638. The results illustrated that the tensile strength and young modulus tended to be improved with fiber length and concentration, the largest values of tensile strength and young modulus for specimens reinforced with bamboo fibers are (72.4 MPa and 5.208 GPa) while for specimens reinforced with siwak fibers are (71 MPa and 4.9 GPa) at optimum condition of weight fraction (9%) and fiber length (12 mm) which was significantly higher than other formulations.","PeriodicalId":412611,"journal":{"name":"Journal of Material Science & Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132589421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.4172/2169-0022.1000264
M. R, Borvayeh L
A new theory for 180° domain wall in ferroelectric perovskite material is presented in this work. The effect of flexoelectric coupling on the domain structure is analyzed. We show that the 180° domain wall has a mixed character of Ising and Bloch type wall and that the polarization perpendicular to the domain wall is not zero though it is very small compared to the spontaneous polarization in the case of tetragonal Barium Titanate. Finally, we present the effect of the new finding on the domain wall interaction with defects in the material.
{"title":"Investigation of the Flexoelectric Coupling Effect on the 180° Domain Wall Structure and Interaction with Defects","authors":"M. R, Borvayeh L","doi":"10.4172/2169-0022.1000264","DOIUrl":"https://doi.org/10.4172/2169-0022.1000264","url":null,"abstract":"A new theory for 180° domain wall in ferroelectric perovskite material is presented in this work. The effect of flexoelectric coupling on the domain structure is analyzed. We show that the 180° domain wall has a mixed character of Ising and Bloch type wall and that the polarization perpendicular to the domain wall is not zero though it is very small compared to the spontaneous polarization in the case of tetragonal Barium Titanate. Finally, we present the effect of the new finding on the domain wall interaction with defects in the material.","PeriodicalId":412611,"journal":{"name":"Journal of Material Science & Engineering","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126194008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.4172/2169-0022.1000312
Mongelli Gf
After performing computations in molecular dynamics in high performance research systems, many solvable but yet unsolved problems have been determined. These include (i) a list of molecules which are of commercial and scholarly interest that can be parameterized with the available OPLS-AA literature, (ii) a list of metals in certain environments which have yet to be parameterized and would provide insight into their behavior in commercial processes, (iii) an empirical approach to searching for the impact of molecular parameterizations on observable properties which is useful in searching for new materials, and (iv) understanding molecular reactivity in computational molecular dynamics.
{"title":"Low Hanging Fruit in Computational Molecular Dynamics Simulations with the Published OPLS-AA Force Field","authors":"Mongelli Gf","doi":"10.4172/2169-0022.1000312","DOIUrl":"https://doi.org/10.4172/2169-0022.1000312","url":null,"abstract":"After performing computations in molecular dynamics in high performance research systems, many solvable but yet unsolved problems have been determined. These include (i) a list of molecules which are of commercial and scholarly interest that can be parameterized with the available OPLS-AA literature, (ii) a list of metals in certain environments which have yet to be parameterized and would provide insight into their behavior in commercial processes, (iii) an empirical approach to searching for the impact of molecular parameterizations on observable properties which is useful in searching for new materials, and (iv) understanding molecular reactivity in computational molecular dynamics.","PeriodicalId":412611,"journal":{"name":"Journal of Material Science & Engineering","volume":"725 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122004134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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