Physical and Mechanical Properties of Visible Light Cure Composites Based on Novel Organically Modified Ceramic Resins

2013 ◽  
Vol 685 ◽  
pp. 50-53
Author(s):  
P.P. Lizymol
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Surface Hardness ◽  
Physical And Mechanical Properties ◽  
Inorganic Materials ◽  
Polymerization Shrinkage ◽  
Tooth Structure ◽  
Organically Modified ◽  
Restoration Failure ◽  
Materials Used

Replacement of damaged tooth is necessary for proper functioning and better aesthetics. Polymeric composites based on organic resins are the most popular materials used for restoration of damaged tooth though they have many problems like polymerization shrinkage. The post gel polymerization shrinkage causes significant stresses in the surrounding tooth structure and composite tooth bonding leading to premature restoration failure. Other problems such as uncured organic monomers leaching from the dental composites into the surrounding gum tissue have been reported to cause cytotoxic effects, pulpal necrosis, requiring tooth extraction. The present paper describes the studies on visible light cure composites based on organically modified ceramic resins. Effect of different inorganic materials incorporated during resin synthesis on mechanical properties of photo cured composite was evaluated in terms of diametral tensile strength (DTS), compressive strength (CS) and surface hardness (VHN). The better properties of photocured composites based on the novel organically modified ceramic resin which are hybrid inorganic organic resins may be due to the effective bonding between the organic and inorganic parts within the resin.

The Silorane-based Resin Composites: A Review

2017 ◽  
Vol 42 (1) ◽  
pp. E24-E34 ◽  
Author(s):  
GA Maghaireh ◽  
NA Taha ◽  
H Alzraikat
Keyword(s):  
Mechanical Properties ◽  
Bond Strength ◽  
Clinical Significance ◽  
Physical And Mechanical Properties ◽  
Marginal Adaptation ◽  
Resin Composites ◽  
Restorative Material ◽  
Polymerization Shrinkage ◽  
Tooth Structure

SUMMARY This article aims to review the research done on the silorane-based resin composites (SBRC) regarding polymerization shrinkage and contraction stresses and their ability to improve the shortcomings of the methacrylate-based resin composites (MRBC). Special attention is given to their physical and mechanical properties, bond strength, marginal adaptation, and cusp deflection. The clinical significance of this material is critically appraised with a focus on the ability of SBRC to strengthen the tooth structure as a direct restorative material. A search of English peer-reviewed dental literature (2003-2015) from PubMed and MEDLINE databases was conducted with the terms “low shrinkage” and “silorane composites.” The list was screened, and 70 articles that were relevant to the objectives of this work were included.

Formation and properties of nanocomposites made up from solid aspen wood, melamine-urea-formaldehyde, and clay

Holzforschung ◽  
2007 ◽  
Vol 61 (2) ◽  
pp. 148-154 ◽  
Author(s):  
Xiaolin Cai ◽  
Bernard Riedl ◽  
S.Y. Zhang ◽  
Hui Wan
Keyword(s):  
Mechanical Properties ◽  
Ball Mill ◽  
Urea Formaldehyde ◽  
Surface Hardness ◽  
Physical And Mechanical Properties ◽  
Water Soluble ◽  
Aspen Wood ◽  
Wood Polymer ◽  
Density Surface

Abstract Wood polymer nanocomposites were prepared from solid aspen wood, water-soluble melamine-urea-formaldehyde (MUF) resin, and silicate nanoclays. The nanofillers were ground with a ball-mill before being mixed with the MUF resin and impregnated into the wood. The water-soluble prepolymer was mixed with the nanoclays at a mixing speed of 3050 rpm for 20 min to form impregnation solutions. Wood was impregnated with resin, which polymerized in situ under certain conditions. The physical and mechanical properties of the composite and the effect of ball-milling treatment of nanofillers on these properties were investigated. Significant improvements in physical and mechanical properties, such as density, surface hardness, and modulus of elasticity, were obtained for specimens impregnated with MUF resin and nanoclay-MUF resin mixtures. Ball-mill treatment favors dispersion of the nanofillers into the wood, but also appears to interfere with particle-resin adhesion.

SIFAT FISIK DAN MEKANIK PAPAN PARTIKEL DARI LIMBAH PLASTIK JENIS HDPE (High Density Polyetylene) DAN RANTING/CABANG KARET (Hevea brasiliensis Muell.Arg)

2011 ◽  
Vol 3 (1) ◽  
pp. 7
Author(s):  
Sari Mirad Noor
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Raw Materials ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Plastic Waste ◽  
High Density ◽  
Different Types ◽  
Materials Used ◽  
The Impact

The need of log increace rapidly, mean while forest product decrease, so efficiency on wood process should be done wisely, in the other hand plastic waste is uncompossed material, become an environmental problems. This research aims to determine the impact of particles of type HDPE plastic wastes and twigs/branches of rubber on some physical and mechanical properties of wood. Physical properties have been tested for water content, density, thickness, and water absorption. Although mechanical properties tests were tough Broken/Module of Rufture (MOR) and the preservation of architecture/modulus of elasticity (MOE).     The raw materials used are polyethylene of high density of waste plastic and rubber adhesive urea formaldehyde branch branch. Experimental design used the randomized Completely Design (RCD) 5 x 4, in which each treatment became much like 5 times replicated).The treatment used is the diversity of the composition of the waste of plastic of different types of polyethylene of high density provides a significant effect on the content of water, water absorption, the density and the development of thickness. With regard to the persistence and the fracture of the arch determination not to give a significant effect.Keywords: physical and mechanical properties, particle board, HDPE plastic waste, branch/twig of  rubber.

Preparation, Physical and Mechanical Characterization of Montmorillonite/Polyethylene Nanocomposites

2006 ◽  
Vol 312 ◽  
pp. 205-210 ◽  
Author(s):  
V. Pettarin ◽  
Victor Jayme Roget Rodriguez Pita ◽  
Francisco Rolando Valenzuela-Díaz ◽  
S. Moschiar ◽  
L. Fasce ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Physical And Mechanical Properties ◽  
Melt Blending ◽  
X Ray Diffraction ◽  
Clay Platelet ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Organically Modified

In this paper, we report the preparation of polyethylene composites with organically modified montmorillonite. Three different Na+-montmorillonites were modified in order to obtain organoclays and two grades of high-density polyethylene were used as composite matrices. All composites were prepared by melt blending, and their physical and mechanical properties were thoroughly characterized. The extent of clay platelet exfoliation in the composites was confirmed by X-ray diffraction (XRD). Mechanical properties under static and impact conditions were evaluated to assess the influence of the reinforcement on the properties of polyethylene.

scholarly journals Peculiarities of hydration of Portland cement with synthetic nano-silica

2017 ◽  
Vol 12 (2) ◽  
pp. 101-106 ◽  
Author(s):  
Galyna Kotsay
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Portland Cement ◽  
Cement Hydration ◽  
Physical And Mechanical Properties ◽  
The Other ◽  
Nano Materials ◽  
Nano Silica ◽  
Other Hand ◽  
Materials Used

Abstract Application of nano-materials in cement products significantly, improves their properties. Of course, the effectiveness of the materials depends on their quantity and the way they are introduced into the system. So far, amongst nano-materials used in construction, the most preferred was nano-silica. This research investigated the effect of synthetic precipitated nano-silica on the cement hydration as well as, on the physical and mechanical properties of pastes and mortars. Obtained results showed that admixture of nano-silica enhanced flexural and compressive strength of cement after 2 and 28 days, however, only when admixture made up 0.5% and 1.0%. On the other hand, the use of nano-silica in the amount 2% had some limitations, due to its ability to agglomerate, which resulted in deterioration of the rheological and mechanical properties.

scholarly journals Study of physical and mechanical properties of laboratory and industrial samples of heat insulating materials used for the production of pre-insulated pipes, fi ttings and polyurethane shells

2020 ◽  
Vol 1 (11-12) ◽  
pp. 50-55
Author(s):  
L. V. Luchkina ◽  
G. G. Nikiforova ◽  
V. G. Vasiliev ◽  
S. V. Romanov
Keyword(s):  
Mechanical Properties ◽  
Polyurethane Foam ◽  
Thermal Insulation ◽  
Production Technology ◽  
Physical And Mechanical Properties ◽  
Chemical Components ◽  
Insulating Materials ◽  
Foaming Agents ◽  
Materials Used ◽  
Industrial Samples

Polyurethane foam insulation based of environmentally friendly chemical components using novel foaming agents was obtained. Physical and mechanical properties of thermal insulation was investigating. The infl uence of foaming agents on insulation properties and production technology of preinsulated pipes, fi ttings and polyurethane shells was studied. It is shown that when using water and dimethoxymethane, polyurethane foam insulation has quite good physical and mechanical properties and can be used in the production of PI pipes, shells and fi ttings.

scholarly journals PHYSICAL AND MECHANICAL PROPERTIES RESEARCH AND ANALYSIS OF CONCRETE WITH BIOFUEL COMBUSTION FLY ASH SUPPLEMENT

2019 ◽  
Vol 11 (0) ◽  
pp. 1-5
Author(s):  
Deividas Augutis ◽  
Džigita Nagrockienė
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Physical And Mechanical Properties ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Ash Content ◽  
Closed Porosity ◽  
Freeze Thaw ◽  
Materials Used

Materials used for the study: Portland cement CEM I 42,5 R, 0/4 fraction sand, 4/16 fraction gravel, biofuel fly ash, superplastizer ViscoCrete D187 (V) and water. Seven compositions of concrete were designed by replacing 0%, 5%, 10%, 15%, 20%, 25% and 30% of cement with biofuel fly ash. The article analyses the effect of biofuel fly ash content on the properties of concrete. Studies have shown that the increase of biofuel fly ash content up to 15% increases concrete density and compressive strengh after 28 days of curing, compressive strength, ultrasonic pulse velocity, closed porosity, concrete forecasted freeze-thaw cycles and decreases water absorbtion, open porosity.

Comparative Analysis of the Physical and Mechanical Properties of Composites with Functional Fillers Based on Waste

2021 ◽  
Vol 410 ◽  
pp. 668-673
Author(s):  
Vyacheslav V. Barakhtenko ◽  
Tatiana H. Sahabutdinova ◽  
Yury V. Novikov
Keyword(s):  
Mechanical Properties ◽  
Comparative Analysis ◽  
Industrial Waste ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Point Of View ◽  
Metallic Materials ◽  
Materials Used ◽  
Functional Fillers ◽  
Properties Of Composites

The article is devoted to research in the development of composite materials based on polyvinyl chloride and industrial waste from the metallurgical, energy and mining industries. The properties of dispersed waste have been studied, which make it possible to speak of the possibility of their use as fillers for polymer compositions. A comparative analysis of the tested physical and mechanical properties is carried out, depending on the characteristics of the particle size of the fillers. It was revealed that from the point of view of construction materials, all the wastes under study can be used as fillers. The development will make it possible to dispose of industrial waste to obtain useful products and save natural non-metallic materials used in the creation of composites.

Sign in / Sign up

Export Citation Format

Share Document