Toward a Better Understanding of B72 Acrylic Resin/Methyltrimethoxysilane Stone Consolidants

1990 ◽  
Vol 185 ◽  
Author(s):  
G.S. Wheeler ◽  
G.L. Shearer ◽  
S. Fleming ◽  
L.W. Kelts ◽  
A. Vega ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Reaction Mechanism ◽  
Chemical Nature ◽  
Polymer Network ◽  
Physical And Mechanical Properties ◽  
Acrylic Resin ◽  
Solid Polymer ◽  
Adhesive Properties ◽  
Mechanism And Kinetics ◽  
Stone Consolidants

AbstractB72 acrylic resin/methyltrimethoxysilane (YMTMOS) mixtures are frequently employed as consolidants for deteriorated limestones, sandstones and marbles- The addition of B72 to MTMOS imparts adhesive properties to the consolidant but it is not known to what degree the B72 affects the reactions which MTMOS must undergo to form a solid polymer network. This paper examines the following chemical, physical, and mechanical properties in order to better understand B72/MTMOS systems: 1. viscosity 2. vapor pressure 3. reaction mechanism and kinetics 4. chemical nature of polymer solids 5. rupture moduli of polymer solids and 6. rupture moduli of stone/consolidant composites.

METAL COMPOSITE MATERIALS BASED ON TITANIUM ALLOYS, REINFORCED WITH REFRACTORY PARTICLES (review)

2021 ◽  
pp. 36-45
Author(s):  
E.I. Krasnov ◽  
◽  
V.M. Serpova ◽  
L.G. Khodykin ◽  
A.V. Gololobov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Composite Materials ◽  
Literature Review ◽  
Titanium Alloys ◽  
Chemical Nature ◽  
Physical And Mechanical Properties ◽  
Metal Composite ◽  
The Matrix ◽  
Metal Composite Materials

Presents a literature review in the field of methods for strengthening titanium and its alloys by introducing various refractory particles into the matrix. The main problematic issues related to the chemical nature of refractory particles and titanium alloys that arise during hardening are briefly described. The main structural, physical and mechanical properties and morphology of such metal composite materials are described. The dependence of the influence of various refractory particles and their amount, as well as the effect of heat treatment on the physical and mechanical properties of microns based on titanium alloys, is presented.

The Performance Study of Waterborne Damping Coating

2015 ◽  
Vol 1088 ◽  
pp. 444-448
Author(s):  
Xiao Wang ◽  
Pei Min Hou ◽  
Yuan Hao Xu ◽  
Jian Lei
Keyword(s):  
Mechanical Properties ◽  
Chemical Resistance ◽  
Physical And Mechanical Properties ◽  
Acrylic Resin ◽  
Damping Factor ◽  
Damping Properties ◽  
Performance Study ◽  
Excellent Performance

In this paper, waterborne damping coating with excellent performance was prepared by self-made acrylic resin, and its physical and mechanical properties, chemical resistance, and damping properties (damping factor) were studied.

scholarly journals Interpenetrating Polymer Network Hydrogels Based on Gelatin and PVA by Biocompatible Approaches: Synthesis and Characterization

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Eltjani-Eltahir Hago ◽  
Xinsong Li
Keyword(s):  
Mechanical Properties ◽  
Mtt Assay ◽  
Biomedical Applications ◽  
Polymer Network ◽  
Physical And Mechanical Properties ◽  
Morphological Characterization ◽  
Interpenetrating Polymer Network ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
New Approach

In this work, a new approach was introduced to prepare interpenetrating polymer network PVA/GE hydrogels by cross-linking of various concentration gelatin in the presence of transglutaminase enzyme by using the freezing-thawing cycles technique. The effects of freezing-thawing cycles on the properties of morphological characterization, gel fraction, swelling, mechanical, and MTT assay were investigated. The IPN PVA/GE hydrogels showed excellent physical and mechanical Properties. MTT assay data and the fibroblasts culture also showed excellent biocompatibility and good proliferation. This indicates that the IPN hydrogels are stable enough for various biomedical applications.

Physical and mechanical properties of sulfonated aromatic copolyimide membranes

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Ahmad Rabiee ◽  
Shahram Mehdipour-Ataei
Keyword(s):  
Mechanical Properties ◽  
Chemical Structure ◽  
Physical And Mechanical Properties ◽  
Xrd Analysis ◽  
Polymeric Films ◽  
Solid Polymer ◽  
Plastic Behavior ◽  
Thermally Stable ◽  
Sem Micrograph ◽  
Ion Conducting

AbstractPhysical and mechanical properties of four series of chemically and thermally stable sulfonated copolyimides as ion-conducting ionomers for application in fuel cell membrane, depending on chemical structure of diamine monomers were studied. The physical and mechanical properties of solid polymer membranes including thermal stability, mechanical strength, water uptake, stability in water, crystallinity and morphology were evaluated. All the polymers were thermally stable. The XRD analysis and SEM micrograph revealed that the polymers were almost amorphous and hydrophobic-hydrophilic phase separation in polyimide did not occur. Use of flexible monomers such as 4,4'-oxydianiline (ODA) and 4,4'-(4-aminophenoxy) diphenylsulfone (APDS) in the hydrophobic sequences increased the plastic behavior compared to rigid polymers prepared from 4,4'-(5- amino-1-naphthoxy) diphenylsulfone (ANDS) and m-phenylenediamine (m-PDA). It was concluded that the properties of polymeric films were strictly dependent on chemical composition of monomers and molecular weight of copolymers.

Performance Analysis of Ammonium Lignosulfonate/Urea Formaldehyde-Free Fiberboards

2010 ◽  
Vol 113-116 ◽  
pp. 1774-1778 ◽  
Author(s):  
Ming Hui Guo ◽  
Yong Wang ◽  
Fang Yan Liu
Keyword(s):  
Mechanical Properties ◽  
Reaction Mechanism ◽  
Performance Analysis ◽  
Chemical Reactions ◽  
Chemical Reaction ◽  
Urea Formaldehyde ◽  
Wood Fiber ◽  
Physical And Mechanical Properties ◽  
Filling Material ◽  
Furan Resin

The tests on physical and mechanical properties of fiberboards made of wood fiber with ammonium lignosulphonate/urea as filling material are performed according to requirement of EU standards EN 622-2-2004 "Fibreboard-Specifications Part 2: Requirements for hardboard" reveal the reaction mechanism of formaldehyde-free fiberboards with ammonium lignosulfonate /urea as filling material through analysis of characteristics of chemical reactions on ammonium lignosulfonate and urea by FTIR and the chemical reaction analysis of C atom by ESCA. The results show that physical and mechanical properties of fiberboards with ammonium lignosulphonate/urea as filling material have reached the requirement of EU standards EN 622-2-2004, the forming of furan resin, the results of reaction between urea and furfural substances is main reason for the better physical and mechanical properties of lignin-based formaldehyde-free fiberboard.

scholarly journals Effect of thermocycling in a hard denture liner and acrylic resin after different chemical and mechanical polishing

2015 ◽  
Vol 63 (4) ◽  
pp. 397-404
Author(s):  
Graziella Morfim Schramm ALIGNANI ◽  
Juliana Maria Costa Nuñez PANTOJA ◽  
Jessica Mie Ferreira Koyama TAKAHASHI ◽  
Andréa Araújo de VASCONCELLOS ◽  
Marcelo Ferraz MESQUITA ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Impact Resistance ◽  
Surface Hardness ◽  
Physical And Mechanical Properties ◽  
Acrylic Resin ◽  
Mechanical Polishing ◽  
Tukey Test ◽  
Before And After ◽  
The Impact ◽  
Resistance Tests

Objective: To evaluate the effect of aging in a hard denture reline (New Truliner) and an acrylic resin (Classic) after chemical and mechanical polishing. Methods: Eighty specimens were made, divided randomly between 8 groups: G1.Acrylic Resin Classic (RAC)/Mechanical Polishing (PM); G2.RAC/PM + thermocycling (TR); G3) RAC/Chemical Polishing (PQ); G4.RAC/PQ + TR; G5.New Truliner (NT)/PM; G6.NT/PM + TR; G7. NT/PQ; G8.NT/PQ + TR. The surface hardness was measured before and after polishing, and after TR. The impact resistance tests were measured after all applied treatments. The data were submitted to ANOVA and Tukey test (a=5%). Results: Regardless of the polishing, it was noted that RAC presented significantly higher surface hardness than NT; PM had higher hardness in both materials compared with PQ; on both polishing, the impact resistance of the RAC was higher than NT. Independently of TR test, the impact resistance of the materials that received PQ was higher than received PM. The PQ caused greater changes in properties than the PM. Conclusion: Aging and chemical and mechanical polishing influenced the physical and mechanical properties of hard denture reline and acrylic resin.

Effect of azo compounds on structure and mechanical properties of copper coating electrodeposited on oxidized aluminum alloys

2021 ◽  
Vol 6 ◽  
pp. 40-59
Author(s):  
D. V. Belov ◽  
◽  
M. V. Maximov ◽  
S. N. Belyaev ◽  
T. I. Devyatkina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
Azo Dye ◽  
High Performance ◽  
Physical And Mechanical Properties ◽  
Copper Coating ◽  
Azo Compounds ◽  
Methyl Red ◽  
Copper Plating ◽  
Adhesive Properties

This article discusses a new method for producing copper electrolytic coatings with high performance properties applied to oxidized aluminum alloys. The purpose of this work is to reveal the effect of the azo compound additive, methyl red (MR), on the structure and physicomechanical properties of copper coatings deposited on oxidized aluminum. To achieve this goal, the following tasks were solved: the microstructure and adhesive properties of the copper coating formed on oxidized aluminum alloys were determined, and the physical and mechanical properties of the copper coating (microhardness, open porosity, adhesion) were connected with the action of an azo dye in the copper plating electrolyte. Samples of aluminum alloys AD1M and AMg6BM were subjected to anodic treatment under the same conditions in two oxidation electrolytes of various compositions. The process of applying a copper coating to samples of oxidized aluminum alloys was carried out using a standard copper plating electrolyte. The comparison was carried out with a copper plating electrolyte of the same composition, in which an additive of azo dye, methyl red (MR). The use of this technology will not only increase the reliability and durability of machine parts and mechanisms, but also restore old ones, which is an important and relevant scientific and technical task.

scholarly journals Effect of Oil Paint Addition on Impact Strength of the Scleral Part of the Acrylic Ocular Prosthesis

2018 ◽  
Vol 12 (1) ◽  
pp. 946-951
Author(s):  
Firas Abd Kati
Keyword(s):  
Mechanical Properties ◽  
Titanium Dioxide ◽  
Impact Strength ◽  
Physical And Mechanical Properties ◽  
Acrylic Resin ◽  
Control Group ◽  
Ocular Prosthesis ◽  
Acrylic Resins ◽  
Oil Paints ◽  
The Impact

Background: For many dental and facial restorations, acrylic resins are the materials of choice because of their appropriate physical and mechanical properties. When making the ocular prosthesis from such materials, it is essential to add the perfect shade in order to match the colour of normal eye. This, however, might have a significant effect on the mechanical properties of acrylic resins. Objective: The purpose of this study was to assess the effect of adding the white oil paint (titanium dioxide) to clear acrylic resins on their impact strength. Methods: 20 samples were constructed from heat cured acrylic resins, and divided into two groups (control and experimental) and each group had 10 samples. The first group was made from clear acrylic resin without the addition of white oil paints, and the second group (experimental) comprised the addition of 1 ml of the white oil paints to acrylic samples. Such samples were prepared with dimensions of (80 mm X10 mm X4 mm) length, width, and thickness, respectively. All the samples were tested by the Charpy's impact strength test. They were exposed to the load till the fracture occurred. All the values were analyzed using SPSS version 20, and the independent T-test was used for comparison between the 2 groups. Results: A statistically significant decrease (P-value < 0.001) was found in the impact strength of acrylic resins after the addition of titanium dioxide oil paints (experimental group: 5.97 + 1.11, control group: 9.42+1.32 KJ/M2). Conclusion: This study concluded that the addition of titanium dioxide oil paint significantly reduces the impact of strength of the acrylic resin. It is suggested to use different stains which will have no negative effect on impact strength of the acrylic resin.

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