• Elastomers and Composites
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• 제58권3호
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• pp.142-151
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• 2023

In this study, we investigate the thermal and mechanical properties of composites comprising ethylene propylene diene monomer (EPDM) and polybutadiene (PB) obtained using carbon black (CB) as a reinforcing and compatibilizing filler. Owing to the significance of elastomeric materials in various industrial applications, blending of EPDM and PB has emerged as a strategic method to optimize the material properties for specific applications. This study offers insights into the blend composition, its microstructure, and the resulting macroscopic behaviors, focusing on the synergetic effects of composite materials. Furthermore, this study delves into curing and rheological behaviors, crosslink densities, and mechanical, thermal, and elastic properties of the elastomeric composites. Through systematic exploration, we believe that this study will be beneficial to material scientists and engineers working on developing advanced elastomeric composites.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2009년도 제33회 추계학술대회논문집
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• pp.449-452
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• 2009

EPDM(Ethylene-propylene diene monomer)계 고무의 난연성 향상을 위하여 무기계 난연재료인 $Al(OH)_3$와 $Sb_2O_3$를 첨가하여 물성 및 열적 특성을 조사하였다. 각 시편의 물성은 큰 차이를 보이지 않았으나, 난연재료의 함량이 증가할 수 록 비중과 경도는 높아지는 반면에 신율은 낮아지는 경향이 있었다. 본 연구에서는 열분석과 난연성 시험을 실시하였고, 결과적으로 난연재료의 함량이 10phr 이상에서는 난연 효과가 확연히 나타나는 것으로 판단되었다.

• 한국응용과학기술학회지
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• 제28권4호
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• pp.410-417
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• 2011

Effects of ethylene-propylene diene monomer (EPDM)/polypropylene (PP), zinc oxide, stearic acid, and clay on the combustive properties based on EDPM/PP were investigated. The EDPM/PP/clay nanocomposites was compounded to prepare specimen for combustive analysis by cone calorimeter (ISO 5660-1). It was found that the specific mass loss rate (SMLR) in the nanocomposites decreased due to the fire resistance compared with unfilled EDPM/PP, while the nanocomposites showed the higher total heat release (THR), higher CO production release, and higher specific extinction area (SEA) than those of virgin EPDM/PP. The stearic acid for softening ruber increased the THR and amount of smoke by itself, combustible.

• 폴리머
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• 제25권3호
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• pp.406-413
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• 2001

고분자의 블렌드는 새로운 성질을 가지는 재료의 제조를 위한 하나의 방법으로 제시되고 있다. 그러나 대부분의 재료는 재료사이의 점탄성, 표면에너지 그리고 상호결합력의 차이로 인하여 비상용성을 지니며, 이로 인하여 블렌드물은 예상되는 물성을 나타내지 못하는 경우가 있다. 실리콘 고무는 우수한 내열성과 전기적 성질을 가지며, ethylene propylene diene monomer (EPDM) 고무는 우수한 기계적 물성을 지니고 있다. 본 실험에서는 실리콘과 EPDM 고무의 블렌드를 통한 전기적 성질과 기계적 물성이 우수한 새로운 기능성 재료의 개발에 목적을 두었다.

• International Journal of Precision Engineering and Manufacturing
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• 제7권4호
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• pp.23-27
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• 2006

Rubber is used in many industrial products, such as hoses, rubber belts, and oil seals. In particular, more than 200 rubber parts are used in automobiles. The design technology of these parts is largely dependent on field experience, which leads to lengthy and expensive developing procedures. However, with the help of recent developments in nonlinear computer analysis, new rubber products can be developed at low cost. In this study, rubber injection molding design variables, such as location and number of gates, were optimized using computer-aided engineering with the cross-WLF equation to produce CLIP rubber products made from ethylene propylene diene monomer(EPDM). The validity of the proposed design was evaluated by comparison with actual forming results.

• Elastomers and Composites
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• 제53권2호
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• pp.80-85
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• 2018

Chloro isobutylene isoprene rubber (CIIR) and ethylene propylene diene monomer (EPDM) compounded with other formulation chemicals, depending on the polymer blend, were prepared by mechanical mixing. After manufacturing the rubber vulcanizate by compression molding with a hot press, the mechanical and thermal properties including thermal conductivity, rebound resilience of the CIIR/EPDM blends were measured. As the EPDM rubber content increased, hardness and tension set showed a tendency to increase. Pure CIIR exhibited the lowest tensile strength; however, tensile strength increased with loading of EPDM rubber. On the other hand, in CIIR rubber, which is usually a low-rebound elastomer owing to a high damping effect, rebound resilience exhibited an increasing trend as the content of EPDM rubber increased. As the EPDM rubber content increased, thermal stability was improved due to reduction of decomposition rate in the rubber region of the blend vulcanizate.

• 항공우주시스템공학회지
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• 제7권4호
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• pp.36-41
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• 2013

In order to improve incombustibility of EPDM(Ethylene propylene diene monomer)-based rubber, inorganic materials as $Al(OH)_3$ and $Sb_2O_3$ were added. The mechanical and thermal properties have been measured for vulcanized rubber loaded with different concentrations of $Al(OH)_3$ and $Sb_2O_3$. As inorganic material contents increases from 5phr to 30phr, the specific gravity and hardness increase while elongation at break decreases. This study performed incombustibility test and thermal analysis through TGA(Thermogravimetric Analyzer). As a results, incombustible and thermal properties of EPDM-based rubber were improved as $Al(OH)_3$ and $Sb_2O_3$ contents increase.

• 폴리머
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• 제38권1호
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• pp.62-68
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• 2014

고무 매트릭스와 벤토나이트의 상용성을 향상시키기 위하여 유기개질 벤토나이트는 벤토나이트 현탁액에서 실란커플링제인 [3-(2-aminoethylamino)propyl]trimethoxysilane(AEAPTMS)]를 사용하여 합성되었다. 유기개질 벤토나이트의 구조와 특성을 FTIR-spectroscopy, thermogravimetric analysis(TGA) and X-ray diffraction(XRD) 등을 사용하여 분석하였다. Ethylene-propylene-diene monomer(EPDM) 고무와 유기 벤토나이트를 two-roll mill에서 배합하였으며 가황을 하고 물성을 측정하였다. 벤토나이트 개질에 대하여 염산과 물의 농도가 복합체의 물성에 중요한 영향을 미치는 것으로 확인되었다. 벤토나이트의 함량이 20 phr 포함된 복합체의 경우 가장 좋은 물성을 나타내었고 인장강도는 1.95에서 4.8 MPa로 증가되었으며 신장률은 300에서 500%로 증가하는 경향을 보였다.

• 한국재료학회지
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• 제9권4호
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• pp.409-413
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• 1999

Recently, the polymeric insulators have been accepted in several countries for the outdoor high voltage applications. In comparison with the conventional porcelain, polymeric insulators offer various advantages such as light weight, superior vandal resistance and better contamination performance. The outdoor polymeric insulating materials such as silicone rubber, ethylene propylene diene monomer(EPDM), ethylene vinyl acetate(EVA) and epoxy are aged such as silicone rubber, ethylene propylene diene monomer(EPDM), ethylene vinyl acetate(EVA) and epoxy are aged under the various natural environment with the long-term performance in outdoor. In this paper, the effects of UV-under the various natural environment with the long-term performance in outdoor. In this paper, the effects of UV-ray on the surface of silicone rubber were investigated by using the weather-Ometer. The accelerated aging stresses were simulated by UV radiation, high temperature and humidity as well as water spray. These aging characteristics were examined through contact angle measurements, tracking resistance test, FT-IR and SEM/EDS analysis. The experimental results showed that tracking resistance decreases with increase in the UV-ray irradiation period. But the surface of silicone rubber kept hydrophobicity. It is found that the inorganic filler such as)$ Al(OH_3$ improves tracking resistance and the $Tio_2$is very effective in preventing degradation of silicone rubber surface from UV-ray.

• Elastomers and Composites
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• 제48권1호
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• pp.39-45
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• 2013

Haake Rheocorder로 각종 과산화물 개시제를 사용하여 ethylene-propylene-diene terpolymer (EPDM)에 단량체 citraconic acid (CCA)을 용융 그라프트 중합을 하여 그라프트 중합물 CCA-g-EPDM을 얻었으며, 이때 효율적인 그라프트 정도와 우수한 성능을 지닌 그라프트 중합물을 얻기 위해서 최적의 반응조건과 최적의 단량체/개시제 농도를 찾는 것은 매우 중요하다. 따라서 본 연구에서는 반응조건과 단량체 및 개시제 함량이 CCA-g-EPDM의 그라프트 정도, 그라프트 효율, 가교정도 (겔화도), 용융흐름지수(MI) 및 기계적 물성 등에 미치는 영향에 초점을 맞추었다. 그라프트 정도와 가교도가 증가함에 따라서 인장강도는 상당히 증가한 반면, 파괴신도 및 MI는 감소하였다. 개시제 중에서 2,5-dimethyl-2,5-di(tert-butyl peroxy)-hexane (T-101)가 가장 우수한 그라프트 정도 (2.31%)를 나타내었으며, CCA와 T-101의 함량이 증가함에 따라 그라프트 정도가 크게 증가하였다. 그리고 그라프트 정도는 반응(혼합)온도 및 반응시간이 증가함에 따라 역시 증가하다가 어느 온도/시간 이상에서는 안정화 혹은 약간 감소하는 경향을 나타내었다. 이러한 영향으로 결과로부터 최적의 단량체/개시제 농도는 5/0.05 wt%이었으며, 최적의 반응온도/시간은 $180^{\circ}C$/15분인 것을 알 수 있었다.