Electromagnetic and mechanical properties of carbonyl iron powder‐filled methyl vinyl silicone rubber during thermal aging

Abstract

Rubber‐absorbing material patches have been extensively applied in various fields because of its softness, excellent adhesive property, and moldability. However, the material undergoes thermal aging when used in a high‐temperature environment for a long time. Therefore, the mechanism through which the properties change with aging must be elucidated. This work mainly aims to analyze the electromagnetic and mechanical properties of such materials during thermal aging. Methyl vinyl silicone rubber (VMQ) was loaded with 45 vol% carbonyl iron powder (CIP) and subjected to accelerate thermal aging. The electromagnetic and mechanical properties were measured with a network analyzer and electronic tensile testing machine, respectively. Results confirmed the increase in the complex dielectric constant, the decrease in the band width of reflection loss (RL) ≤ −10 dB, and the lack of significant change in permeability. The tensile strength, tear strength, and Shore A hardness of CIP/VMQ composite‐absorbing materials evidently increased, but the elongation at break sharply decreased after hot air aging at 200°C for 14 days. POLYM. COMPOS., 39:2897–2903, 2018. © 2017 Society of Plastics Engineers

Stealth technology: Methods and composite materials—A review

“…For instance, a two‐layer structure consisting one layer of carbon black and one layer of carbonyl iron. Parameters (filler content and thickness) of each layer can be tuned to vary the overall absorption characteristics of RAM …”

Biological and mechanical characterization of biodegradable carbonyl iron powder/polycaprolactone composite material fabricated using three-dimensional printing for cardiovascular stent application

“…Many kinds of micro-to nano-sized particles such as calcium carbonate (CaCO 3 ), calcium phosphates (CaPs), montmorillonite (MMT), titania (TiO 2 ), zirconia (ZrO 2 ), carbonyl iron powder (CIP), and alumina (Al 2 O 3 ) have been reinforced in polymers to improve the physical behavior of PCL. [14][15][16] Among micro-sized particles, CIP is a pure form of iron which has a great potential to amend the mechanical properties as well as biological properties by reinforcement in polymer matrix desired for the cardiovascular applications. 15,[17][18][19][20] The properties such as slow rate of degradation, zero segmentation with blood plasma, negligible toxicity, prominent physical strength, zero inflammation, biocompatible, radiopaque, and antithrombotic make iron as an attractive material for biodegradable cardiovascular stents.…”

“…[14][15][16] Among micro-sized particles, CIP is a pure form of iron which has a great potential to amend the mechanical properties as well as biological properties by reinforcement in polymer matrix desired for the cardiovascular applications. 15,[17][18][19][20] The properties such as slow rate of degradation, zero segmentation with blood plasma, negligible toxicity, prominent physical strength, zero inflammation, biocompatible, radiopaque, and antithrombotic make iron as an attractive material for biodegradable cardiovascular stents. 5,18,19,[21][22][23][24] Solvent cast three-dimensional (SC3D) printing is a method of direct printing of thermoplastics by dissolving the polymers in a solvent that is directly used for extrusion-based rapid manufacturing.…”

“…Numerous researchers [15][16][17][27][28][29][30][31] have been working in the direction of improving the physical properties of PCL by the development of composite material. Russo et al 16 developed a composite material for bone tissue engineering consisting of a PCL matrix strengthened by the addition of sol-gel-derived PCL/ZrO 2 and PCL/ TiO 2 fillers.…”

Thermal aging properties of flame retardant silicone rubber based on melamine cyanurate

“…A failure of insulating performance and mechanical deterioration are observed in SR-based materials once subjected to harsh environment (i.e., temperature, moisture, chemicals, and external force). [21][22][23][24][25][26][27][28][29][30] Qin et al reported that chemical bonds formed during the high temperature vulcanization silicone rubber (HTV-SR) can be ruptured by ultraviolet accelerated aging. The surface roughness reduces with a large number of holes, then the internal particles are exposed gradually.…”