Conductive Plastics Methods

1980 ◽  
Vol 102 (4) ◽  
pp. 823-828 ◽  
Author(s):  
E. J. Bradbury ◽  
D. M. Bigg
Keyword(s):  
Volume Loading ◽  
Conductive Fillers ◽  
Conductive Plastics ◽  
Thermal Conductivities

Plastics offer cost, maintenance, and density advantages over metals for many lowstrength applications. Low electrical and thermal conductivities, however, are major deficiencies for some applications. The addition of conductive fillers to the polymer will improve these deficiencies. The two filler parameters which most significantly affect the conductivity of the composite are volume loading and the shape. This paper discusses the effects of various filler types and shapes on the conducitivity of plastics.

Characterization of Silicone Rubber Reinforced with Conductive Powder

2011 ◽  
Vol 378-379 ◽  
pp. 535-538
Author(s):  
Elena Valentina Stoian
Keyword(s):  
Electromagnetic Field ◽  
Human Factor ◽  
Shielding Effectiveness ◽  
Micro Particles ◽  
Conductive Fillers ◽  
Transmission Measurements ◽  
Common Problems ◽  
Silicone Rubbers ◽  
Conductive Plastics

Conductive plastics are attracting more and more interest in electronics due to their light weight and inability to rust, which are common problems associated with metals. In this work silicone rubbers reinforced with conductive fillers have been fabricated for use in various applications in electronics, telecommunications, and electronics enclosures, or to protect human factor, namely protective clothing. This paper presents the results of experimental determinations concerning electromagnetic field attenuation in materials containing micro-particles of nanocarbon in their structure. To know the effect of shielding effectiveness of electromagnetic field electromagnetic absorbents were performed by transmission measurements of attenuation in the frequency range 1-18 GHz. The goal of present paper consits in the realization a composit material with polymeric matrix. The materials were characterized by transmision diminishing carried out, relative permittivity, compression test and electrical conductivity.

Thermal Conductivity of Composite Silicone Rubber Filled with Graphite / Silicone Carbide

2011 ◽  
Vol 221 ◽  
pp. 382-388 ◽  
Author(s):  
Yan He ◽  
Xue Sheng Wu ◽  
Zhen Chao Chen
Keyword(s):  
Thermal Conductivity ◽  
Silicone Rubber ◽  
Graphite Flake ◽  
Curing Agent ◽  
Liquid Form ◽  
Conductive Fillers ◽  
Silicone Carbide ◽  
Carbide Particles ◽  
Better Than ◽  
Thermal Conductivities

Graphite flakes and silicone carbide particles are used as heat conductive fillers added into methyl vinyl silicone rubber, and the effect of filler amount, filler shape and different curing agents (DCP, DBPMH) on the thermal conductivities of silicone rubber are investigated in this article. The results reveal that the thermal conductivities of composite silicone rubber will be increased with the increase of the amount of fillers. While the filling content surpasses a certain value, the thermal conductivity of composite increases obviously. The silicone rubber filled with graphite flake possesses a higher thermal conductivity than that filled with silicone carbide particles at relative high fillers content, but both of them are close to each other at relative low fillers content. Moreover, the thermal conductivities of composite silicone rubber filled with the powder form curing agent (DCP) are better than that of composite silicone rubber filled the liquid form curing agent (DBPMH).

Thermal Conductivity of EPDM Rubber Filled with Modified Nano-AlN

2013 ◽  
Vol 561 ◽  
pp. 146-151
Author(s):  
Lian Xiang Ma ◽  
Na Zhang ◽  
Gang Yang ◽  
Yan He
Keyword(s):  
Mechanical Properties ◽  
Free Energy ◽  
Surface Free Energy ◽  
Phenol Formaldehyde ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Epdm Rubber ◽  
The Matrix ◽  
Conductive Fillers ◽  
Thermal Conductivities

In order to improve the thermal conductivities of composites, AlN are used as thermal conductive fillers of EPDM rubber. The contact angle and surface free energy of AlN and modified AlN are studied. The influence filler amount and the surface treatment of AlN which coated by phenol formaldehyde resin (PF), on the thermal conductivities and mechanical properties of composites material are also investigated. The results show that the surface free energy of modified AlN is lower than unmodified, so the modified AlN are easier dispersion in the matrix. Through the TGA analysis, it can give a quantitative analysis of the surface coating thickness. With the increase of the filler, the thermal conductivities of composites are all on the rise, while the mechanical properties decreased in different degree. The modified AlN have active impacts on the thermal conductivities and harmful to mechanical properties of the filled EPDM rubber.

Beyond homogeneous dispersion: oriented conductive fillers for high κ nanocomposites

2021 ◽  
Author(s):  
Seunggun Yu ◽  
Xi Shen ◽  
Jang-Kyo Kim
Keyword(s):  
Rational Design ◽  
Homogeneous Dispersion ◽  
Conductive Fillers ◽  
Thermal Conductivities

Rational design of structures for regulating the thermal conductivities (κ) of materials is critical to many components and products employed in electrical, electronics, energy, construction, and aerospace, as well as...

Thermal Conductivity and Mechanical Properties of Silicone Rubber Filled with Different Particle Sized SiC

2009 ◽  
Vol 87-88 ◽  
pp. 137-142 ◽  
Author(s):  
Yan He ◽  
Zhen Chao Chen ◽  
Lian Xiang Ma
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Silicone Rubber ◽  
Filling Fraction ◽  
Large Particles ◽  
Conductive Fillers ◽  
Negative Impacts ◽  
Silicone Carbide ◽  
Carbide Particles ◽  
Thermal Conductivities

Micro- and nano- silicone carbide particles are used as heat conductive fillers of methyl vinyl silicone rubber, and the influence of filler amount, particle size and the surface treatment of filler on the thermal conductivities and mechanical properties of silicone rubber are studied. The results show that the thermal conductivities of silicone rubber are improved, but the mechanical properties are worse with the increase of the amount of fillers. The composite filled with smaller sized silicone carbide has a better thermal conductivity than that filled with large particles in a relatively high filling fraction, and composite filled with different sized silicone carbide has different mechanical properties at the same filling amount. Treatment of fillers with coupling agent (KH-560, A-171) has active impacts on the thermal conductivity but negative impacts on mechanical properties of the filled silicone rubber.

WIELAND-K32

Alloy Digest ◽  
2005 ◽  
Vol 54 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Electrical Engineering ◽  
Heat Treating ◽  
Power Cables ◽  
Bend Strength ◽  
Thermal Conductivities

Abstract Wieland-K32 is a nondeoxidized copper with acceptable electrical and thermal conductivities. It is often called electrolytic tough pitch copper. Typical applications include wrapping strip for power cables and for coaxial telephone cables in electrical engineering. This datasheet provides information on composition, physical properties, elasticity, and bend strength. It also includes information on corrosion resistance as well as heat treating and joining. Filing Code: CU-728. Producer or source: Wieland Metals Inc.

PD-135

Alloy Digest ◽  
1972 ◽  
Vol 21 (11) ◽  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Thermal Conductivities

Abstract PD-135 is an oxygen-free, age-hardenable copper containing chromium and cadmium. It has excellent mechanical properties and high electrical and thermal conductivities. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-261. Producer or source: Phelps Dodge Copper Products Company.

THE EFFECTS OF STRATIGRAPHY AND COAL AND SHALE THERMAL CONDUCTIVITIES ON TEMPERATURES GRADIENTS IN THE PICEANCE BASIN, COLORADO, USA

2016 ◽  
Author(s):  
Zachary Souvall ◽  
◽  
Allison Keator ◽  
Molly Baron ◽  
Paul Morgan ◽  
...  
Keyword(s):  
Piceance Basin ◽  
Thermal Conductivities

scholarly journals Lightweight Cement Conglomerates Based on End-of-Life Tire Rubber: Effect of the Grain Size, Dosage and Addition of Perlite on the Physical and Mechanical Properties

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 225
Author(s):  
Andrea Petrella ◽  
Michele Notarnicola
Keyword(s):  
Grain Size ◽  
End Of Life ◽  
Compression Tests ◽  
Tire Rubber ◽  
Impact Compression ◽  
Weight Percentage ◽  
Deep Groove ◽  
Mechanical Strengths ◽  
The Impact ◽  
Thermal Conductivities

Lightweight cement mortars containing end-of-life tire rubber (TR) as aggregate were prepared and characterized by rheological, thermal, mechanical, microstructural, and wetting tests. The mixtures were obtained after total replacement of the conventional sand aggregate with untreated TR with different grain sizes (0–2 mm and 2–4 mm) and distributions (25%, 32%, and 40% by weight). The mortars showed lower thermal conductivities (≈90%) with respect to the sand reference due to the differences in the conductivities of the two phases associated with the low density of the aggregates and, to a minor extent, to the lack of adhesion of tire to the cement paste (evidenced by microstructural detection). In this respect, a decrease of the thermal conductivities was observed with the increase of the TR weight percentage together with a decrease of fluidity of the fresh mixture and a decrease of the mechanical strengths. The addition of expanded perlite (P, 0–1 mm grain size) to the mixture allowed us to obtain mortars with an improvement of the mechanical strengths and negligible modification of the thermal properties. Moreover, in this case, a decrease of the thermal conductivities was observed with the increase of the P/TR dosage together with a decrease of fluidity and of the mechanical strengths. TR mortars showed discrete cracks after failure without separation of the two parts of the specimens, and similar results were observed in the case of the perlite/TR samples thanks to the rubber particles bridging the crack faces. The super-elastic properties of the specimens were also observed in the impact compression tests in which the best performances of the tire and P/TR composites were evidenced by a deep groove before complete failure. Moreover, these mortars showed very low water penetration through the surface and also through the bulk of the samples thanks to the hydrophobic nature of the end-of-life aggregate, which makes these environmentally sustainable materials suitable for indoor and outdoor elements.

Sign in / Sign up

Export Citation Format

Share Document