Effect of Synthesis Parameters and Post-Cure Temperature on the Mechanical Properties of Geopolymers Containing Slag

2010 ◽  
pp. 101-105
Author(s):  
Tammy L. Metroke ◽  
Brian Evans ◽  
Jeff Eichler ◽  
Michael I. Hammons ◽  
Michael V. Henley
Keyword(s):  
Mechanical Properties ◽  
Synthesis Parameters ◽  
Cure Temperature

scholarly journals Dynamic Cure Kinetics and Physical-Mechanical Properties of PEG/Nanosilica/Epoxy Composites

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Haleh Nowruzi Varzeghani ◽  
Iraj Amiri Amraei ◽  
Seyed Rasoul Mousavi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cure Kinetics ◽  
Diglycidyl Ether ◽  
Solid Particles ◽  
Scanning Calorimetry ◽  
Cure Reaction ◽  
Cure Kinetic ◽  
Cure Temperature ◽  
Kinetics Of

This study investigated the effect of polyethylene glycol (PEG) and nanosilica (NS) on the physical-mechanical properties and cure kinetics of diglycidyl ether of bisphenol-A-based epoxy (DGEBA-based EP) resin. For this purpose, tensile and viscometry tests, dynamic mechanical thermal analysis (DMTA), and differential scanning calorimetry (DSC) were carried out under dynamic conditions. The results showed that adding NS and PEG enhances the maximum cure temperature as well as the heat of cure reaction (ΔH) in EP-NS, while it decreases in EP-PEG and EP-PEG-NS. The cure kinetic parameters of EP-PEG-NS were calculated by Kissinger, Ozawa, and KSA methods and compared with each other. The Ea calculated from the Kissinger method (96.82 kJ/mol) was found to be lower than that of the Ozawa method (98.69 kJ/mol). Also, according to the KAS method, the apparent Ea was approximately constant within the 10-90% conversion range. Tensile strength and modulus increased by adding NS, while tensile strength diminished slightly by adding PEG to EP-NS. The glass transition temperature (Tg) was calculated using DMTA which was increased and decreased by the addition of NS and PEG, respectively. The results of the viscometry test showed that the viscosity increased with the presence of both PEG and NS and it prevented the deposition of solid particles.

scholarly journals Influence of synthesis parameters on mechanical properties of nanocomposite PMMA-MXene

Tehnika ◽  
2021 ◽  
Vol 76 (5) ◽  
pp. 545-549
Author(s):  
Ivan Pešić ◽  
Miloš Petrović ◽  
Vesna Radojević
Keyword(s):  
Mechanical Properties ◽  
Sample Preparation ◽  
Modulus Of Elasticity ◽  
Weight Fraction ◽  
Deionized Water ◽  
Sem Images ◽  
Synthesis Parameters ◽  
Additional Peak ◽  
Reduced Modulus ◽  
Influence Of Solvents

In this paper, the influence of solvents and reinforcement processing methods on the mechanical properties of nanocomposite poly-(methyl methacrylate) PMMA-Ti3C2Tx MXene was investigated. A weight fraction of reinforcement was 1% and two types of solvents were used for sample preparation: dimethylformamide (DMF) and acetone (Ac). Deionized water and DMF were used to delaminate the MXene. An additional peak at 1675 cm-1 was observed on the FTIR spectra of the obtained samples, which indicates that some amount of DMF remained in the material after drying. The results of microindentation show that samples where MXene was delaminated in deionized water and PMMA dissolved in acetone had a 74.46% higher reduced modulus of elasticity, which is supported by SEM images where better dispersion of MXenes is observed.

scholarly journals Effect of powder metallurgy synthesis parameters for pure aluminium on resultant mechanical properties

2018 ◽  
Vol 12 (1) ◽  
pp. 79-87 ◽  
Author(s):  
Jinghang Liu ◽  
Javier Silveira ◽  
Robert Groarke ◽  
Sohan Parab ◽  
Harshaan Singh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Pure Aluminium ◽  
Synthesis Parameters

scholarly journals Correlating Synthesis Parameters to Morphological Entities: Predictive Modeling of Biopolymer Aerogels

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1670 ◽  
Author(s):  
Ameya Rege ◽  
Imke Preibisch ◽  
Maria Schestakow ◽  
Kathirvel Ganesan ◽  
Pavel Gurikov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Clear Correlation ◽  
Model Parameters ◽  
Pore Collapse ◽  
Research Attention ◽  
Nonlinear Constitutive Model ◽  
Synthesis Parameters ◽  
Proposed Model ◽  
Significant Research ◽  
Nitrogen Desorption

In the past decade, biopolymer aerogels have gained significant research attention due to their typical properties, such as low density and thermal insulation, which are reinforced with excellent biocompatibility, biodegradability, and ease of functionalization. Mechanical properties of these aerogels play an important role in several applications and should be evaluated based on synthesis parameters. To this end, preparation and characterization of polysaccharide-based aerogels, such as pectin, cellulose and k-carrageenan, is first discussed. An interrelationship between their synthesis parameters and morphological entities is established. Such aerogels are usually characterized by a cellular morphology, and under compression undergo large deformations. Therefore, a nonlinear constitutive model is proposed based on large deflections in microcell walls of the aerogel network. Different sizes of the microcells within the network are identified via nitrogen desorption isotherms. Damage is initiated upon pore collapse, which is shown to result from the failure of the microcell wall fibrils. Finally, the model predictions are validated against experimental data of pectin, cellulose, and k-carrageenan aerogels. Given the micromechanical nature of the model, a clear correlation—qualitative and quantitative—between synthesis parameters and the model parameters is also substantiated. The proposed model is shown to be useful in tailoring the mechanical properties of biopolymer aerogels subject to changes in synthesis parameters.

Effect of Film Thickness and Cure Temperature on the Mechanical Properties of FOx® Flowable Oxide Thin Films

1999 ◽  
Vol 565 ◽  
Author(s):  
Huey-Chiang Liou ◽  
John Pretzer
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Film Thickness ◽  
Thermal Stresses ◽  
Coefficient Of Thermal Expansion ◽  
Structure Change ◽  
Curing Temperature ◽  
Different Temperatures ◽  
Cure Temperature ◽  
Different Thickness

AbstractThe mechanical properties and thermal stresses of FOx thin films at different thickness and cured at different temperatures have been investigated by a nanoindentor and a profilometer. In this study, the correlation between structure change, thickness, Si-H/Si-O ratio, modulus, hardness, and calculated coefficient of thermal expansion (CTE) of FOx films have been established. The results show that the modulus of 400°C cured FOx film decreases with increasing film thickness while the hardness slightly varies with increasing film thickness. The calculated CTE of FOx film increases with increasing film thickness. In addition, both the modulus and hardness of FOx films increase with increasing curing temperature. However, the calculated CTE of FOx film decreases with increasing curing temperature. The Si-H/Si-O ratio increases with increasing film thickness but decreases with increasing curing temperature. These results indicate that the increase in modulus and hardness and the decreases in CTE for FOx films are either due to the remaining of Si-H bonds in FOx film at different film thickness or the conversion of Si-H into Si-O when forming the network structure in the FOx film at higher curing temperatures.

Effect of Cure Temperature on the Glass Transition Temperature and Mechanical Properties of Epoxy Adhesives

2013 ◽  
Vol 90 (1) ◽  
pp. 104-119 ◽  
Author(s):  
R. J. C. Carbas ◽  
E. A. S. Marques ◽  
L. F. M. da Silva ◽  
A. M. Lopes
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Epoxy Adhesives ◽  
Cure Temperature

Effect of synthesis parameters on the mechanical properties of fly ash-based geopolymers

2007 ◽  
Vol 301 (1-3) ◽  
pp. 246-254 ◽  
Author(s):  
Dimitrios Panias ◽  
Ioanna P. Giannopoulou ◽  
Theodora Perraki
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Synthesis Parameters

Mechanical Properties of the Cracked Thick Aluminum Plate Repaired with M40J/Epoxy Composite Patch

2012 ◽  
Vol 190-191 ◽  
pp. 513-516
Author(s):  
Shi Tong Li ◽  
Su Li Xing ◽  
Si Wei Wen ◽  
Chao Yi Peng ◽  
Shun Yong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cost Effective ◽  
Aluminum Plate ◽  
Molding Process ◽  
Single Side ◽  
Cost Effective Method ◽  
Aluminum Plates ◽  
Cure Temperature ◽  
Better Than

To extend the service life of the equipment, a novel, efficient and cost-effective method is used to recover the damaged component of the equipment. The mechanical properties of unidirectional M40J/epoxy composites, prepared by molding process, were studied. Then the centre-cracked thick LC52CS aluminum plates were single and double side repaired with the composites patches by vacuum bagging technology in which three cure cycles were applied. Results show that a low cure temperature induce a small thermal residual stress. Choosing the cure cycle with the highest tensile strength of single-side repaired specimens, the tensile strength of single-side and double-side repaired specimens enhance 31.50% and 47.29% of that of the unrepaired specimens, respectively. And fatigue life of the double-side repaired specimens extends that of the cracked aluminum plate over 76 times, which is also significantly better than that of the single-side repaired specimen.

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