Thermo-Mechanical Properties of Thermoset Polymers and Composites Fabricated by Frontal Polymerization

2018 ◽  
pp. 89-91
Author(s):  
M. Yourdkhani ◽  
B. Koohbor ◽  
C. Lamuta ◽  
L. M. Dean ◽  
P. Centellas ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Frontal Polymerization ◽  
Thermoset Polymers

Continuous reactors of frontal polymerization in flow for the synthesis of polyacrylamide hydrogels with prescribed properties

2020 ◽  
Vol 40 (7) ◽  
pp. 601-606
Author(s):  
Anahit O. Tonoyan ◽  
Anahit Z. Varderesyan ◽  
Armine G. Ketyan ◽  
Aram H. Minasyan ◽  
Karlen O. Hovnanyan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Frontal Polymerization ◽  
Synthesis Process ◽  
Practical Implementation ◽  
Polyacrylamide Hydrogels ◽  
Absorption Kinetic ◽  
The Subject ◽  
Nano Additives ◽  
Polymeric Hydrogels ◽  
Kinetics Of

AbstractTaking into account the fact that since the 1970s frontal polymerization (FP) reactors in flow have been the subject of our study, the work gives a brief chronology of the development of FP reactors for the synthesis of high molecular polymers, polymeric hydrogels with cross-linked structure, their advantages and drawbacks. The reasons for the impossibility of the practical implementation of tubular FP reactors in flow for the synthesis of polymers are established. The possibility of implementation of tubular FP reactors for the synthesis of polyacrylamide hydrogels (PAH) capable of absorbing and releasing large amount of water is presented. The paper also presents some data on the methods for the synthesis of PAHs with prescribed properties in tubular continuous FP reactors by way of using nano-additives and regulating the kinetics of the synthesis process. As a result, the synthesis process of PAHs with the required properties both in the absorption and release of water, and in the physical-mechanical properties was carried out in frontal tubular-type reactors in flow, and the water absorption kinetic curves and physical-mechanical properties of the obtained hydrogels are presented.

scholarly journals Rapid preparation of PAM/N-CNT nanocomposite hydrogels by DEM frontal polymerization and its performance study

RSC Advances ◽  
2021 ◽  
Vol 11 (56) ◽  
pp. 35268-35273
Author(s):  
Bin Li ◽  
Jizhen Liu ◽  
Dandan Fu ◽  
Yongjing Li ◽  
Xiaojia Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Frontal Polymerization ◽  
Performance Study ◽  
Rapid Preparation ◽  
Ph Response ◽  
Nanocomposite Hydrogels ◽  
Response Behaviour

In this study, a simple and eco-friendly method was proposed to efficiently prepare nanocomposite hydrogels with excellent mechanical properties and satisfactory pH response behaviour by frontal polymerization of DEM in close to 4 minutes.

Frontal polymerization as a convenient technique for the consolidation of tuff

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Alberto Mariani ◽  
Simone Bidali ◽  
Piergiulio Cappelletti ◽  
Giuseppe Caria ◽  
Abner Colella ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Point Of View ◽  
Frontal Polymerization ◽  
Campania Region ◽  
Technical Point ◽  
X Ray ◽  
Analytical Technique ◽  
Full Characterization ◽  
Convenient Technique ◽  
Non Destructive

AbstractFrontal Polymerization was successfully exploited as an innovative technique for the consolidation of Neapolitan Yellow Tuff, the main volcaniclastic rock of Campania region (Italy). The protocol used and the full characterization in terms of mechanical properties of the resulting consolidated stone are presented here and discussed together with the data obtained by X-ray tomography as a non destructive analytical technique for determining the internal map of the consolidated material. The proposed treatment definitely succeeded from the technical point of view resulting in an enhancement of mechanical properties.

A robust and reproducible procedure for cross-linking thermoset polymers using molecular simulation

Soft Matter ◽  
2016 ◽  
Vol 12 (8) ◽  
pp. 2453-2464 ◽  
Author(s):  
Baris Demir ◽  
Tiffany R. Walsh
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Molecular Simulation ◽  
Cross Linking ◽  
Polymer Precursor ◽  
Liquid Polymer ◽  
The Cross ◽  
Thermoset Polymers

Our reliable and reproducible cross-linking procedure ranges from careful equilibration of the liquid polymer precursor to calculating the thermo-mechanical properties of the cross-linked polymer. Our approach can be used to cure not only pure thermoset polymers, but also thermoset-based composite materials.

scholarly journals Mechanical Properties of Polyester Toughened with Nano-Silica

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Diyar Kaka ◽  
Roma A. Fatah ◽  
Parzhin Gharib ◽  
Ahmad Mustafa
Keyword(s):  
Mechanical Properties ◽  
Homogeneous Material ◽  
Finite Element Models ◽  
Nano Silica ◽  
Advanced Composite ◽  
Dispersed Particles ◽  
Advanced Composite Materials ◽  
Content Ratio ◽  
Thermoset Polymers ◽  
Material Concept

The fabrication of nanocomposites has played role to the development of the nanotechnology and the technology of advanced composite materials. Thermoset polymers are used in engineering applications widely. Their mechanical properties can be change with adding particles. The mechanism of toughening polymers has been suggested recently by reinforcing well dispersed particles to the plain polymer. Nano-silica particles were added to thermoset polymer of polyester to evaluate their influence on the mechanical properties of the toughened polymer using both experimental and numerical methods. The Representative Volume Element (RVE) approach, which employs finite element models, has been developed to achieve that aim numerically for various types of nano-particle reinforcement ratios. In each case, the stiffness has been calculated with using the equivalent homogeneous material concept.  Experimentally, toughened thermoset polymers of polyester reinforced with nano-silica were prepared with different particle content ratio. Several tests were conducted on the nanocomposite, and it was observed increasing nano-silica ratio caused increase in Young’s modulus and decrease in ductility.

Phase Transformations in Ti-7w/oMo-3w/oMe Alloy

1974 ◽  
Vol 32 ◽  
pp. 514-515
Author(s):  
S. Fujishiro
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Tensile Strength ◽  
Mechanical Processing ◽  
Ray Method ◽  
X Ray ◽  
Transmission Electron ◽  
Water Quench ◽  
Alpha Beta

The mechanical properties of three titanium alloys (Ti-7Mo-3Al, Ti-7Mo- 3Cu and Ti-7Mo-3Ta) were evaluated as function of: 1) Solutionizing in the beta field and aging, 2) Thermal Mechanical Processing in the beta field and aging, 3) Solutionizing in the alpha + beta field and aging. The samples were isothermally aged in the temperature range 300° to 700*C for 4 to 24 hours, followed by a water quench. Transmission electron microscopy and X-ray method were used to identify the phase formed. All three alloys solutionized at 1050°C (beta field) transformed to martensitic alpha (alpha prime) upon being water quenched. Despite this heavily strained alpha prime, which is characterized by microtwins the tensile strength of the as-quenched alloys is relatively low and the elongation is as high as 30%.

Effects of cooling rate on the mechanical properties of dual phase treated vanadium steels

1983 ◽  
Vol 41 ◽  
pp. 220-221
Author(s):  
L.J. Chen ◽  
H.C. Cheng ◽  
J.R. Gong ◽  
J.G. Yang
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Automobile Industry ◽  
High Strength ◽  
Weight Percent ◽  
Low Alloy Steels ◽  
Dual Phase ◽  
Resource Requirement ◽  
Alloy Steels ◽  
Potential Weight

For fuel savings as well as energy and resource requirement, high strength low alloy steels (HSLA) are of particular interest to automobile industry because of the potential weight reduction which can be achieved by using thinner section of these steels to carry the same load and thus to improve the fuel mileage. Dual phase treatment has been utilized to obtain superior strength and ductility combinations compared to the HSLA of identical composition. Recently, cooling rate following heat treatment was found to be important to the tensile properties of the dual phase steels. In this paper, we report the results of the investigation of cooling rate on the microstructures and mechanical properties of several vanadium HSLA steels.The steels with composition (in weight percent) listed below were supplied by China Steel Corporation: 1. low V steel (0.11C, 0.65Si, 1.63Mn, 0.015P, 0.008S, 0.084Aℓ, 0.004V), 2. 0.059V steel (0.13C, 0.62S1, 1.59Mn, 0.012P, 0.008S, 0.065Aℓ, 0.059V), 3. 0.10V steel (0.11C, 0.58Si, 1.58Mn, 0.017P, 0.008S, 0.068Aℓ, 0.10V).

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