scholarly journals Experimental Study on Optimization of Filler Concentration of Silicon Rubber Compound Used in High Voltage Insulators

2021 ◽  
Vol 9 (12) ◽  
pp. 327-346
Author(s):  
Allu Shanmukha Rao
Keyword(s):  
Tensile Strength ◽  
Specific Gravity ◽  
Polymeric Material ◽  
Silicone Rubber ◽  
Power Transmission ◽  
Dielectric Strength ◽  
Filler Material ◽  
Inclined Plane ◽  
Tear Strength ◽  
Polymeric Insulators

Abstract: In any power transmission system, insulators are essential for a reliable electrical power supply. The Efficiency of insulators will be decided by their electrical and mechanical properties. Recently in many of the power transmission systems, the conventional porcelain insulators are being replaced by polymeric insulators due to various advantages in their properties. Polymeric insulators have been increasingly popular in recent years as a result of their superior performance in contaminated environments due to their hydrophobic nature. However, research is still being carried out on Polymeric material with regards to ageing condition and feasibility for large scale utilization. Ageing of insulation is due to Environmental, Tracking and Erosion conditions. Ageing leads to immature failures and uncertainty in the performance of the insulators. The constituent materials and their properties have a significant impact on the performance of polymeric insulators. There is a strong need to look into newer filler materials which can be added to the existing polymeric base materials to constitute a composite. Keeping this in mind, in the proposed research uses Silicone rubber as base polymeric material and along with that additives are added to arrive at three different composites. A new filler material will be added to the base material forming a new composite. All these HTV Silicone rubber based composites are then tested the recovery of hydrophobicity, dielectric strength, hardness, specific gravity, tensile strength , ultimate elongation ,tear strength properties based on ASTM standards. Further, Inclined plane Tracking and Erosion studies are also conducted on the polymeric test samples for 6 hours to evaluate the SiR housing material suitability for outdoor insulator applications by subjecting them to AC high voltages under laboratory conditions as per IEC 60587 standards. Keywords: Recovery of hydrophobicity, dielectric strength, hardness, specific gravity, tensile strength, ultimate elongation, tear strength, inclined plane tracking and erosion, ageing, filler material.

Nonwoven Fabrics Made by Using Recycled Polyester Fiber to Reinforce Low-Melting-Point Polylactide: Processing Technique and Property Evaluation

2014 ◽  
Vol 910 ◽  
pp. 230-233
Author(s):  
Jia Horng Lin ◽  
Ying Huei Shih ◽  
Ching Wen Lin ◽  
Ching Wen Lou
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Melting Point ◽  
Polymeric Material ◽  
Processing Technique ◽  
Air Permeability ◽  
Tear Strength ◽  
Nonwoven Fabrics ◽  
Property Evaluation ◽  
Polymeric Waste

Polymeric material, which is commonly used in packaging, has been widely applied due to the fact that it is lightweight and chemical resistant. Being non-degradable, polymeric waste can thus only be eliminated by burning, and subsequently, there is a rising need for degradable polymeric material to manage this manner of disposal. This study thus uses degradable, low-melting-point polylactide (LMPLA) fibers and recycled polyester (RPET) fibers to make nonwoven fabrics for packaging. The tensile strength, tear strength, and air permeability of the nonwoven fabrics are then tested. The experiment results show that a 40% of RPET fibers can effectively promote the mechanical properties of the LMPLA nonwoven fabrics.

Experimental Investigation on Electrical and Mechanical Characteristics of PVC Cable Insulation with Silica Nano Filler

2015 ◽  
Vol 749 ◽  
pp. 159-163 ◽  
Author(s):  
D. Edison Selvaraj ◽  
R. Vijayaraj ◽  
U. Satheeshwaran ◽  
J. Nancy ◽  
C. Pugazhendhi Sugumaran ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Characteristics ◽  
Power Transmission ◽  
Dielectric Strength ◽  
Filler Material ◽  
Laboratory Studies ◽  
Voltage Level ◽  
Cable Insulation ◽  
Transmission And Distribution ◽  
Dielectric And Mechanical Properties

Cables are an integral part of the power transmission and distribution network. As the voltage level increases, amount of insulation used in the cable increases. Therefore a need arises for a material with better insulation characteristics to be used in cables. The dielectric strength of cable insulation depends on many factors such as the existence of filler material in the insulation. In this work, laboratory studies on a new filler material for cable insulation have been conducted. The influence of Silicon dioxide (SiO2) filler on the dielectric and mechanical properties of polyvinyl chloride (PVC) cable were analyzed. Comparison is made between the result of measurement and the actual value of the pure specimen. From the results, it is shown that the filler material has improved the dielectric and mechanical properties of the cable insulation.

scholarly journals Preparation and properties of silicone rubber materials with foam/solid alternating multilayered structures

2021 ◽  
Author(s):  
Wenhuan Zhang ◽  
Zhaoping Deng ◽  
Hongwei Yuan ◽  
Shikai Luo ◽  
Huayin Wen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Silicone Rubber ◽  
Cellular Structure ◽  
Cellular Structures ◽  
Compressive Property ◽  
Solid Layer ◽  
Multilayered Structures ◽  
Element Analysis ◽  
Morphology And Mechanical Properties

AbstractIn this paper, silicone rubber materials with foam/solid alternating multilayered structures were successfully constructed by combining the two methods of multilayered hot-pressing and supercritical carbon dioxide (SCCO2) foaming. The cellular morphology and mechanical properties of the foam/solid alternating multilayered silicone rubber materials were systematically studied. The results show that the growth of the cell was restrained by the solid layer, resulting in a decrease in the cell size. In addition, the introduction of the solid layer effectively improved the mechanical properties of the microcellular silicone rubber foam. The tensile strength and compressive strength of the foam/solid alternating multilayered silicone rubber materials reached 5.39 and 1.08 MPa, which are 46.1% and 237.5% of the pure silicone rubber foam, respectively. Finite element analysis (FEA) was applied and the results indicate that the strength and proportion of the solid layer played important roles in the tensile strength of the foam/solid alternating multilayered silicone rubber materials. Moreover, the small cellular structures in silicone rubber foam can provided a high supporting counterforce during compression, meaning that the microcellular structure of silicone rubber foam improved the compressive property compared to that for the large cellular structure of silicone rubber foam.

scholarly journals Utilization of Leather Waste Fibers in Polymer Matrix Composites Based on Acrylonitrile-Butadiene Rubber

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 117
Author(s):  
Le Thuy Hang ◽  
Do Quoc Viet ◽  
Nguyen Pham Duy Linh ◽  
Vu Anh Doan ◽  
Hai-Linh Thi Dang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Polymer Matrix Composites ◽  
Waste Product ◽  
Dynamic Mechanical Properties ◽  
Hammer Mill ◽  
Butadiene Rubber ◽  
Matrix Composites ◽  
Leather Industry ◽  
Tear Strength

In this study, we present the fabrication of nitrile butadiene rubber/waste leather fiber (NBR/WLF) composites with different weight percentages of WLF and NBR (0/100, 20/80, 30/70, 40/60, 50/50, 60/40 wt/wt). WLF was prepared by cutting the scrap leathers from the waste product of the Vietnamese leather industry. Subsequently, in order to make the short fibers, it was mixed by a hammer mill. The characteristics of WLF/NBR composites such as mechanical properties (tensile strength, tear strength, hardness), dynamic mechanical properties, toluene absorption, and morphology were carefully evaluated. As a result, the tensile strength and tear strength become larger with increasing WLF content from 0 to 50 wt% and they decrease when further increasing WLF content. The highest tensile strength of 12.5 MPa and tear strength of 72.47 N/mm were achieved with the WLF/NBR ratio of 50/50 wt%. Both hardness and resistance of the developed materials with toluene increased with increasing WLF content. The SEM results showed a good adhesion of NBR matrix and the WLF. The increasing of storage modulus (E’) in comparison with raw NBR showed good compatibility between WLF and NBR matrix. This research showed that the recycled material from waste leather and NBR was successfully prepared and has great potential for manufacturing products such as floor covering courts and playgrounds, etc.

Inclined-plane tests of textured silicone rubber Samples

2010 ◽  
Author(s):  
P. Sarkar ◽  
A. Haddad ◽  
R. T. Waters ◽  
H. Griffiths ◽  
N. Harid ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Inclined Plane

Linear low-density polyethylene/silicone rubber nanocomposites

2017 ◽  
Vol 50 (1) ◽  
pp. 36-57 ◽  
Author(s):  
Nurul Hidayah ◽  
Mariatti Mustapha ◽  
Hanafi Ismail ◽  
Mohamad Kamarol
Keyword(s):  
Silicone Rubber ◽  
Performance Optimization ◽  
Small Variation ◽  
Volume Resistivity ◽  
Dielectric Strength ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Content Type ◽  
The Relationship

This study determines the applicability of nanofillers (silica, boron nitride, and zinc oxide) in linear low-density polyethylene (LLDPE)/silicone rubber (SR) insulation compounds. Design of experiment is adopted to model the relationship between the properties (permittivity, loss tangent, dielectric strength, and volume resistivity) and factors (SR content, type of nanofiller, and nanofiller loading) for performance optimization. It is observed that SR content and type of nanofiller significantly influence the electrical properties of LLDPE/SR nanocomposites. Nanofiller loading, however, causes a small variation in the properties of the nanocomposites except for dielectric strength. From the optimization, it is found that the optimum formulation composition is 10 wt% of SR and 2 vol% of nanoboron nitride.

APPROACHES TO CONTROLLING MICRO-ORGANISMS IN COTTON AND COTTON/ELASTANE CLOTHINGS

2021 ◽  
Vol 16 (3) ◽  
pp. 124-135
Author(s):  
Nilüfer Yıldız Varan
Keyword(s):  
Mechanical Properties ◽  
Antimicrobial Activity ◽  
Tensile Strength ◽  
Untreated Control ◽  
Physical And Mechanical Properties ◽  
Emergency Rooms ◽  
Tear Strength ◽  
Antifungal Properties ◽  
Micro Organisms ◽  
Control Samples

Antimicrobials are substances or mixtures of substances used to destroy or suppress the growth of harmful microorganisms such as bacteria, viruses, or fungi on inanimate objects and surfaces. In this study, an alternative method is presented using triclosan agents that can kill bacteria and viruses to help keep patient, operating, and emergency rooms free of germs. Samples were treated with triclosan to achieve antimicrobial/antiviral/antifungal properties for further designs to help comfort and bacteria, virus, fungi (BVF) resistantance during use. The physical, and mechanical properties of triclosan treated cotton and cotton/elastane fabrics in comparison with untreated control samples was investigated. The results showed that a small significant decrease was observed for tensile strength (strip and grab methods), tear strength and seam strength. Besides, statistically a small significant decrease was observed with the increase in triclosan concentration for all samples. The panama weaves showed the lowest tensile strength and the highest tear strength and statistically small significant decrease was observed for all treated samples. The antimicrobial tests showed that all treated samples have a very good antimicrobial activity which can also lead to antivirus protection by providing hygienic environment for the users during future designs.

Effect of abrasive particle size on tribological behavior of elastomers

2019 ◽  
Vol 234 (3) ◽  
pp. 373-385 ◽  
Author(s):  
F Hakami ◽  
A Pramanik ◽  
AK Basak ◽  
N Ridgway ◽  
MN Islam
Keyword(s):  
Particle Size ◽  
Tensile Strength ◽  
Wear Rate ◽  
Coefficient Of Friction ◽  
Abrasive Particle ◽  
Tribological Behaviour ◽  
Elongation At Break ◽  
Tear Strength ◽  
Wear And Friction ◽  
Abrasive Size

Effect of abrasive particle size on tribological behaviour of different elastomers was investigated experimentally in this study. The size of abrasive particle size was varied from coarse (425 µm) to fine (82 µm). Wear rate and coefficient of friction were calculated and analyzed accordingly followed by the examination of worn surfaces by a scanning electron microscope to unravel the wear mechanism. Experimental results showed that abrasive size had a significant effect on wear and friction behaviour of the elastomers. As the abrasive particle size increased, wear rate and coefficient of friction also increased at different rates and exhibited different wear mechanisms that changed from friction to fatigue and roll formation. Mechanical properties of elastomers such as hardness, tensile strength, tear strength, and elongation at break also contributed to wear and friction. The effect of elongation at break and tensile strength on wear rate is more pronounced at lower abrasive particle size, whereas hardness and tear strength play a pivotal role at the higher abrasive size.

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