• Elastomers and Composites
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• v.46 no.2
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• pp.138-143
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• 2011

EPDM compounds and vulcanizates containing inorganic filler such as talc, calcium carbonate, or clay as well as carbon black were prepared, and the influence of inorganic filler on properties of the EPDM compounds and vulcanizates were investigated. The bound rubber contents did not significantly increase even though the inorganic filler was added. There were big aggregates in the EPDM samples with high loading inorganic filler. By adding the inorganic filler, the cure times tended to increase and the delta torque decreased. The modulus were on the whole decreased, whereas the elongation at break, tensile strength, and tear strength were increased by adding the inorganic filler. The decreased modulus and increased elongation at break can be explained with the decreased delta torque, the increases of tensile strength and tear strength can be explained with the increased elongation at break. By adding the inorganic filler, level of reinforcing in the EPDM compounds did not increase and the crosslink density decreased.

• Elastomers and Composites
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• v.29 no.2
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• pp.121-130
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• 1994

The physical properties of rubber blend between natural rubber(NR) and ethylene propylene diene terpolymer(EPDM) were investigated as a study of EPDM composite materials. For EPDM/NR blends, the effects of ethylene and diene contents in EPDM, blend ratio, dicumyl peroxide(DCP) curing system on the physical properties, interfacial adhesion force and dynamic crack growth etc. were studied. EPDM/NR blends loaded with carbon black were prepared by mechanical mixing and cured by plate heating cure press. Crosslinking density was measured by swelling method with toluene. The physical properties of all blends were measured with Instron, fatigue to failure(FTF), Demattia flex cracking tester(DMFC), scanning electron microscopy (SEM), etc. As the ethylene and diene contents in EPDM increased, the physical properties, such as dynamic crack growth, adhesion to other component were increased too. Interfacial adhesion force of EPDM/NR blends to dissimilar layer was improved by the use of optimum peroxide curing system.

• Elastomers and Composites
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• v.7 no.1
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• pp.38-44
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• 1972

As a series of the studies of EPDM-polymer blonds, the experiments are concentrated to the investigation of the physical properties of the EPDM-BR blends. The results are shown as follows: 1. In blending, tensile strength and elongation decreased with increase in EPDM contents. 2. The resistance for aging and ozone were much improved after blending. It was effective more :han the ratio of EPDM/BR is 50/50. 3. Tear strength is less influenced after blending and rebound character decreased with increase in EPDM contents.

• Elastomers and Composites
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• v.7 no.1
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• pp.45-52
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• 1972

As a series of the studies of EPDM-Polymer blends, the experiments are concentracted to the investigation of the physical properties of the EPDM-NBR blends. The results are shown as follows; 1. As EPDM addition ratio is increased, the physical properties such as resistance to ozone and aging have also improved, on the other hand, elongation and abrasion resistance decreased. 2. Tear strength is less influenced by blending and character after aging exhibited the same result. 3. Tensile strength decreased with increase in EPDM contents, especially the ratio of EPDM/NBR are 50/50 and 75/25.

• Elastomers and Composites
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• v.6 no.2
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• pp.65-72
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• 1971

The purpose of this study is to establish an effective way to utilize the application of EPDM-Polymer blends. First of all, the physical properties for EPDM/NR blends and compounding agents were studied. The results are shown as follows: 1. In blending, tensile strength and tear strength decreased with increase in EPDM contents. It was not effective more than the ratio of EPDM/NR is 50/50. 2. Elongation is influenced by blending, especially the ratio of EPDM/NR is 50/50. 3. It was found that both the resistance for ozone and aging were much improved after blending.

• Proceedings of the KIEE Conference
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• 2004.07c
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• pp.1652-1654
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• 2004

초고압 지중 케이블을 전기적, 기계적으로 연결하는 역할을 하는 중간 접속함은 미가교 폴리에틸렌을 사용하여 현장에서 가교시키는 TMJ(tape molded Joint), 에폭시와 EPDM고무의 복합 절연구조를 가지고 있는 PJ(Prefabricated Joint), 그리고 EPDM또는 실리콘 고무를 단독으로 사용하는 PMJ(Premolded Joint)로 대표된다. 그러나 TMJ는 현장에서 가교하는 방식으로 조립 후 품질을 파악하기가 쉽지 않으며 PJ는 공장에서 미리 성형한 제품을 현장에서 조립만 하면 되는 구조이나 그 부품의 수가 많고, 이종 계면을 가지고 있는 복합절연구조를 가지고 있어 최근에는 부품의 수도 적고 조립이 간편하며 이종 계변의 수를 최소화하여 전기적 안정성을 높인 조립형 접속함인 PMJ를 선호하는 경향을 보이고 있다. 본 논문에서는 PMJ용으로 사용되는 실리콘 고무의 절연과 반도전 계면에서의 접착력과 전기적 파괴 특성간의 상관 관계를 규명하였고 또한 실리콘 고무의 상온 및 고온에서의 AC 및 Impulse 전압의 특성 변화와 Impulse 전압의 극성효과에 대해 규명하였다.

• Journal of Adhesion and Interface
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• v.2 no.4
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• pp.24-31
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• 2001

Polypropylenes(PP) with different melt index values were mixed with ethylene-propylene rubber(EPR) or ethylene-propylene diene monomer rubber(EPDM) and an ethylene copolymer containing carboxylic acid group in a twin screw extruder. Then test specimens were prepared from the pellets of the blends with an injection molding machine. The mechanical properties and morphology of fractured surfaces were measured. Relative peak intensities of carboxylic acid group on the specimen surface were measured with an attennuated total reflection infrared spectrometer (ATR-IR) and compared with each other. The blend specimens were found to have the gradient morphology of rubber domains in PP matrix in the core region and PP skin layer. The blends containing PP of higher melt index showed greater content of ethylene copolymer containing carboxylic acid on the surface when the relative peak intensities of ATR-IR for carboxylic acid were compared. As the melt index values were increased, the decrease tendency in mechanical propeties such as tensile strength and impact strength was more significant for PP/EPR blends than PP/EPDM blends.

• Elastomers and Composites
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• v.47 no.3
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• pp.216-222
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• 2012

In this study, p-acryloyloxybenzoic acid(ABA) was synthesized with p-hydroxybenzoic acid(HBA) and acryloyl chloride(AC). The synthesized ABA monomer was grafted onto ethylene-propylene-diene rubber(EPDM) in toluene using benzoyl peroxide(BPO) as an initiator. The structures of ABA and EPDM-g-ABA were characterized by FT-IR, $^1H$-NMR, and $^{13}C$-NMR spectrometer. The graft ratio of EPDM-g-ABA increased with increasing the concentration of the initiator and the monomer. Mechanical properties such as tensile strength and compression set of the EPDM-g-ABA were improved with increasing the graft ratio. The $T_g$ and initial decomposition temperature were also increased with increasing the graft ratio.

• Elastomers and Composites
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• v.44 no.3
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• pp.299-307
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• 2009

The effects of reinforcing materials on durability and mechanical properties of V-rib belt were investigated. Cotton fiber and ZnO were used as a filler for CR, and cotton and aramid fiber were used for EPDM rubber compounds. These materials were prepared as a specimen and V-rib belt for heat resistant and mechanical test. High contents of ZnO give improved wear resistance, and higher contents of cotton fiber showed higher durability in high rotation speed but lower wear resistance for CR rubber compounds. Using the aramid and cotton fiber together in EPDM rubber compounds, thermal and wear resistance were improved simultaneously. The material containing EPDM matrix showed better durability and wear resistance than those of containing CR matrix comparing in the same cotton fiber contents.

• Elastomers and Composites
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• v.45 no.3
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• pp.212-216
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• 2010

The materials of the lithium ion battery gasket require chemical resistance to the electrolyte, electrical insulating, compression set, anti-contamination and heat resistance. To estimate suitability for rubber which has better performance to compression set than PFA, each compound were made with various rubbers, such as EPDM, NBR, FKM, FVMQ, VMQ and we checked the characteristics of each compound. Samples from each compound was deposited in Propylene Carbonate and tested for changing of Hardness and Volume during 1,000 hr with $80^{\circ}C$. EPDM and VMQ showed good performance to chemical resistance to the electrolyte, and also we could get the values over $10^{10}{\Omega}cm$ on volume resistance basis in electrical insulating. EPDM and VMQ were judged as the most suitable material.