Vulcanization of EPDM rubber compounds with and without blowing agents: Identification of reaction events and TTT-diagram using DSC data

2014 ◽  
Vol 55 (9) ◽  
pp. 2073-2088 ◽  
Author(s):  
Nora Catalina Restrepo-Zapata ◽  
Tim A. Osswald ◽  
Juan Pablo Hernández-Ortiz
Keyword(s):  
Ttt Diagram ◽  
Epdm Rubber ◽  
Blowing Agents ◽  
Rubber Compounds

scholarly journals The Effect of Injection Molding on Physical Properties of EPDM Rubber

2018 ◽  
Vol 210 ◽  
pp. 02039
Author(s):  
Adam Skrobak ◽  
Vojtech Senkerik ◽  
Vaclav Janostik
Keyword(s):  
Tensile Strength ◽  
Injection Molding ◽  
Physical Properties ◽  
Standard Method ◽  
Epdm Rubber ◽  
Tear Strength ◽  
Injection Method ◽  
Rubber Compounds ◽  
Cutting Out ◽  
Injection Molded

The paper a part of research aimed at the alternative of preparing test samples by injection molding. Such an alternative could bring more objective results in the field of testing samples produced in the same technology. The research is aimed at changing the preparation of rubber testing samples - replacing the standard method according to ISO 23529 by the injection method, especially with the use of rubber compounds for injection molding. This article compares and evaluates the selected physical properties (tensile strength and tear strength) of EPDM rubber injection molded samples with samples prepared by the standard method - cutting out of a compression molded plate. The results have shown that using the injection molded samples we will achieve more objective results mainly to determine the tear strength. In the case of tensile strength, the differences are not so significant.

scholarly journals Optimization of Accelerator Mixing Ratio for EPDM Rubber Grommet to Improve Mountability Using Mixture Design

2019 ◽  
Vol 9 (13) ◽  
pp. 2640 ◽  
Author(s):  
Young Shin Kim ◽  
Yong Tae Kim ◽  
Euy Sik Jeon
Keyword(s):  
Mechanical Properties ◽  
Design Strategy ◽  
Mixture Design ◽  
Vehicle Body ◽  
Mixing Ratio ◽  
Epdm Rubber ◽  
Ethylene Propylene ◽  
Rubber Compounds ◽  
The Wire ◽  
Vulcanization Accelerator

A grommet, made of ethylene propylene diene methylene (EPDM) rubber, is an integral part used for fixing and protecting the wire inserted from the outside to the inside of vehicles. Rubber compounds exhibit various mechanical properties and vulcanization characteristics depending on the accelerator mixing ratio. These mechanical properties affect the insertion and detachment forces when the grommet is manufactured and fixed to the vehicle body. In this study, we experimentally analyzed the changes in the properties of EPDM rubber depending on the vulcanization accelerator to improve the mounting performance of the grommet, and subsequently derived the optimum accelerator mixing ratio. We implemented a mixture design strategy to derive the optimum mixing ratio for obtaining the desired mechanical properties and vulcanization characteristics. The insertion and separation forces of the existing grommet were compared with those of the grommet fabricated using the derived mixing ratio and we found that the mounting performance was improved compared to the existing grommet.

Solid particle erosion of electrically insulating silicon and EPDM rubber compounds

1999 ◽  
Vol 42 (6) ◽  
pp. 717-724 ◽  
Author(s):  
Gyula Besztercey ◽  
József Karger-Kocsis ◽  
Pál Szaplonczay
Keyword(s):  
Solid Particle ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Epdm Rubber ◽  
Rubber Compounds

INFRARED ANALYSIS OF FOULING DURING EPDM CURING STUDIED ON MOLDS MADE OF STEEL AND ALUMINIUM ALLOYS

2018 ◽  
Vol 91 (2) ◽  
pp. 390-400 ◽  
Author(s):  
Barbora Hanulikova ◽  
Dana Shejbalova ◽  
Zdenek Dvorak
Keyword(s):  
Fourier Transform ◽  
Aluminum Alloys ◽  
Vibrational Spectra ◽  
Aluminium Alloys ◽  
Infrared Analysis ◽  
Process Conditions ◽  
Epdm Rubber ◽  
Crosslinking Process ◽  
Paraffin Oil ◽  
Rubber Compounds

ABSTRACT Mold fouling during the crosslinking process of EPDM rubber compounds results in defects in compression-molded products and deterioration of process conditions. Moreover, subsequent cleaning of molds is expensive and causes a loss at production. The fouling of several types of steel and aluminum alloys, which represent molds with variously machined surfaces, was analyzed during 0–70 cycles of EPDM molding. Fourier transform infrared microscopy was used for investigation of fouling and paraffin oil (softener) and/or EPDM fragments were detected in vibrational spectra of fouling as the most probable components of it. Metal specimens with a grinded surface were found to be more resistant to EPDM residue deposition.

Low‐unsaturated soybean oils in EPDM rubber compounds

2021 ◽  
pp. 51499
Author(s):  
Olena Shafranska ◽  
Alexander Jones ◽  
Alex Perkins ◽  
Joseph Dahlgren ◽  
Janice Tardiff ◽  
...  
Keyword(s):  
Epdm Rubber ◽  
Soybean Oils ◽  
Rubber Compounds

AFM Studies on Silica Dispersion in EPDM Rubber

2010 ◽  
Vol 83 (2) ◽  
pp. 123-132 ◽  
Author(s):  
N. Natchimuthu
Keyword(s):  
Epoxy Resin ◽  
Coupling Agents ◽  
Epdm Rubber ◽  
Force Microscopy ◽  
Precipitated Silica ◽  
Morphological Studies ◽  
Atomic Force ◽  
Rubber Compounds ◽  
Silica Fillers ◽  
Silica Dispersion

Abstract EPDM rubber formulations filled with precipitated silica and cross-linked by peroxide vulcanization have been investigated with the objective of realizing better processing characteristics and vulcanizate properties. Dispersion of silica in EPDM rubber in the presence of conventional coupling agents and in the presence of an epoxy resin has been investigated using atomic force microscopy (AFM) and scanning electron microscopy (SEM). AFM results of EPDM rubber compounds containing silica fillers in the presence of the epoxy resin have exhibited improved silica dispersion in terms of scanned height. The latter has been found to be in the range of 0–100 nm for EPDM rubber—silica systems with epoxy resin, while in the absence of the resin, scanned height has been found to be in the range of 0–700 nm. The significant reduction in scanned height in the presence of epoxy resin has been attributed to the reduction in surface roughness which is an indication for good dispersion of silica in the rubber. Morphological studies using SEM, mechanical properties, and Mooney-Rivlin constants all have shown significant improvement in performance properties of EPDM rubber—silica compounds containing epoxy resin and vulcanized with dicumyl peroxide.

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