• Title, Summary, Keyword: EPDM

Search Result 357, Processing Time 0.031 seconds

Thermal Characterization of an EPDM/IIR Rubber Blend using TG/DTG Anylsis (TG/DTG 방법에 의한 EPDM/IIR 고무 블렌드의 열분석)

  • Ahn, Won-Sool
    • Elastomers and Composites
    • /
    • v.42 no.1
    • /
    • pp.55-58
    • /
    • 2007
  • Thermal Characterization of an EPDM/IIR rubber blend was performed using TG/DTG analysis. While TGA thermograms of a virgin EPDM and IIR showed their own characteristic thermal decomposition curves, that of an EPDM/IIR blend sample showed a characteristic curve, exhibiting both decomposition characteristics of EPDM and IIR. This finding was more clarified from DTG analysis obtained by differentiation of TGA thermograms, being exhibited as two distinct shifted-peaks. Degrees of peak-shift (${\Delta}T$) compared to their original positions were $+25\;^{\circ}C$ for IIR and $-15\;^{\circ}C$ for EPDM, respectively. From these facts, thermal stability of EPDM is considered comparatively better than IIR, and moreover, it can be an evidence for the characteristics of a partial compatibility between EPDM and IIR. It is noteworthy that, if we prepare in advance a calibration curve for the composition about EPDM/IIR blend, it may be possible to analyze quantitatively an EPDM/IIR blend, using comparatively simple TGA experiments as in the present work.

Preparation and Properties of Polyorganosiloxane Modified Maleated EPDM/EPDM Rubber Vibration Isolator (Polyorganosiloxane 변성 말레화 EPDM/EPDM 방진고무의 제조와 그 특성)

  • Kang, Doo-Whan;Kim, So-Mi
    • Applied Chemistry for Engineering
    • /
    • v.21 no.5
    • /
    • pp.581-585
    • /
    • 2010
  • The surface of Alnico, one of the industrial dust waste, was treated with 1,3,5-trivinyl-1,3,5-trimethylcyclotrisilazane (VMS) as a surface treating agent and used as the filler for vibration isolator rubber. Maleated EPDM prepared from bulk polymerization of EPDM with maleic anhydride was copolymerized with ${\alpha},{\omega}$-bis(3-aminopropyl)polydimethylsiloxane to obtain maleated EPDM-polydimethylsiloxane copolymer (MEPDM-PDMS). EPDM/Alnico/MEPDM-PDMS vibration isolator rubber was prepared from compounding with Alnico treated with surface treating agent, 25 and 50 phrs to EPDM, respectvely based on 1 to 10 wt% of MEPDM-PDMS to EPDM. From the measurement of the thermal properties to the rubber, the glass transition temperatures (Tg) for the rubber containing maleated EPDM-PDMS copolymer was slightly lower temperature, $33^{\circ}C$ than EPDM rubber, and also DMA results showed higher tan ${\delta}$ peak to the rubber prepared from compounding with EPDM-PDMS copolymer. From the results, rubber prepared using EPDM-PDMS copolymer had better vibration isolator property.

Preparation of EPDM/Polyamide12 Elastomers through Electron Beam Irradiation (전자선 조사를 통한 EPDM/Polyamide12 탄성체의 제조에 관한 연구)

  • Jung, Hyo Shin;Park, Jung Il;Kang, Phil-Hyun;Choi, Myung Chan;Chang, Young-Wook;Hong, Sung Chul
    • Polymer(Korea)
    • /
    • v.37 no.5
    • /
    • pp.571-578
    • /
    • 2013
  • Polyamide12 (PA12) is blended with ethylene propylene diene rubber (EPDM) at various compositions in the presence of maleated EPDM (mEPDM) to afford blend materials having the characteristics of thermoplastic elastomer (TPE). The EPDM/PA12 melt-blends are further irradiated with electron-beam (e-beam) at 0~100 kGy dosage, yielding selective crosslinking between EPDM chains while retaining melt-processibility originated from PA12 phase. mEPDM acts as a compatibilizer and affords additional improvements in mechanical properties of the EPDM/PA12 blend. With 25 kGy of e-beam irradiation and mEPDM, the EPDM/PA12 blends successfully exhibit TPE behaviors with reasonable elastomeric and mechanical properties.

Characteristics of Rutting and Moisture Susceptibility of R-EPDM Modified Asphalt Mixtures (R-EPDM 개질아스팔트 혼합물의 소성변형 및 수분민감성 특성)

  • Jo, Young-Jin;Han, Joung-Min;Noh, Young-Jin;Choi, Se-Hyu
    • International Journal of Highway Engineering
    • /
    • v.12 no.4
    • /
    • pp.87-92
    • /
    • 2010
  • This study evaluates the laboratory properties of asphalt binder and mixture modified with R-EPDM(Recycling Ethylene Propylene Dien Monometer), which consists of R-EPDM as a main ingredient that is an industrial by-product made by manufacturing waste EPDM below 50 mesh as an additive. Superpave system was used to determine the PG(Performane Grade) and evaluate the property of R-EPDM modified binder. OACs(Optimum Asphalt Contents) of R-EPDM modified asphalt mixtures were determined by Superpave mix design using gyratory compactor and wheel tracking test and moisture susceptibility test were carried out with R-EPDM modified asphalt mixtures at OACs. The results from these tests, rutting-resistance and freezing and thawing resistance by moisture susceptibility of R-EPDM modified asphalt mixtures were superior to one of general asphalt mixtures(AP-5).

Studies on the Physical Properties and Application of EPDM-Polymer Blends. Part 6. Physical Properties for EPDM-NR-SBR Blends (EPDM과 각종(各種) Polymer의 Blend에 의(依)한 성능변화(性能變化) 및 그 응용(應用)에 관(關)한 연구(硏究)(제6보(第6報)) EPDM과 Natural Rubber 및 Butadiene-Styrene Rubber의 Blend에 대(對)하여)

  • Kim, Joon-Soo
    • Elastomers and Composites
    • /
    • v.7 no.2
    • /
    • pp.183-192
    • /
    • 1972
  • As a series of tile studies of EPDM-Polymer blends, tile experiment are concentrated to the investigation of the physical properties of tile EPDM-NR-SBR blends. The results are shown as follows: 1. In blending, tensile strength decreased with increase in EPDM contents, especially the ratio of EPDM/NR-SBR is 75/25. 2. Elongation and tear strength were much influenced by blending, especially the ratio of EPDM/NR-SBR is 50/50. 3. Ozone resistance is much improved after blending. It was effective more than tile ratio of EPDM/NR-SBR is 25/75. 4. Aging resistance is much improved after blending. It was effective more than the ratio of EPDM/NR-SBR is 50/50. 5. Hardness increased with increase in EPDM contents and on the other hand, abrasion resistance decreased.

  • PDF

Rheology and Tensile Properties of EPDM/Polyolefin Blends (EPDM과 폴리올레핀 블렌드의 레올로지와 인장물성(引張物性))

  • Ha, Chang-Sik;Ryou, Jin-Ho;Kang, Dong-Il;Cho, Won-Jei
    • Elastomers and Composites
    • /
    • v.25 no.3
    • /
    • pp.203-210
    • /
    • 1990
  • The structure and properties of blends of ethylene-propylene-diene terpolymer(EPDM) and polyolefin blends have been investigated. The rheology and tensile properties of the EPDM/HDPE(high density polyethylene), EPDM/PP(polypropylene) binary and EPDM/PP/HDPE ternary blends were studied along with morphological analyses. Those properties were affected by preferential interaction of EPDM on HDPE, compared to that of EPDM on PP, for the binary blends. The preferetial interaction may stem from the molecular characteristics of EPDM to possess more ethylene units than propylene units in the elastomer. The EPDM played a role as compatibilizer for HDPE and PP in the EPDM/PP/HDPE ternary blends.

  • PDF

Studies on Adhesion Properties of Grafted EPDM Containing Carboxylic Acid Group (카르복시산을 포함하는 Grafted EPDM의 접착특성에 관한 연구)

  • Kim, Dongho;Yoon, Yoomi;Chung, Ildoo;Park, Chanyoung;Bae, Jongwoo;Oh, Sangtaek;Kim, Guni
    • Journal of Adhesion and Interface
    • /
    • v.13 no.1
    • /
    • pp.1-8
    • /
    • 2012
  • The effect of the grafting ratio on the mechanical property and adhesion property of the grafted EPDM modified with methacrylic acid (MA) was investigated. The storage modulus of MA-grafted EPDM was maintained higher than that of cross-linked EPDM vulcanizate by sulfur, but it was observed that the storage modulus was decreased at elevated temperature because of the weakened secondary bonding. When the functional group for hydrogen bonding was introduced in EPDM, it had excellent mechanical properties by the aggregate between grafted EPDM molecules and crystallinity of MA. The bonding strength between EPDM and other rubbers was very low because EPDM has nonpolar property and low molecular interaction to others. The bonding strength was increased as increasing grafting ratio and it was excellent enough to break the rubber during the peel test when the grafting ratio was more than 10%.

Temperature, Electric Field, Pressure Dependency and Dielectric properties on the interface between XLPE and EPDM (XLPE와 EPDM의 계면에 따른 유전특성과 온도, 전계, 압력의존성)

  • 김동식;박대희
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • /
    • pp.109-111
    • /
    • 1997
  • In this paper, we have evaluated temperature, electric field, Pressure dependency and dielectric properties of EPDM XLPE and EPDM/XLPE\`s interface. Temperature dependency of EPDM had great influence with dielectric properties, but pressure and applied voltage of EPDM had no effect on dielectric properties. Dielectric properties of XLPE were influenced by not only temperature but also pressure and applied voltage. We knowed that dielectric properties of EPDM/XLPE were trended toward tendency of those of EPDM

  • PDF

Development of Rubber Composite Materials Using Waste EPDM (폐 EPDM을 이용한 고무 복합 소재 개발)

  • Park, Dong-Kyu;Hong, Yeo-Joo;Jeong, Keuk-Min;Kim, Jin-Kuk
    • Elastomers and Composites
    • /
    • v.47 no.2
    • /
    • pp.121-128
    • /
    • 2012
  • Waste EPDM(W-EPDM) collected from the automotive weather strip and the gasket of a laundry machine has not been effectively recycled. Using this W-EPDM powder and other ingredients, i.e., binder(polyolefin resin, polyolefin elastomer, etc.), filler and additives, various economic rubber composites were made by extrusion. In advance of main experiments, the effects of ultrasonic treatment of W-EPDM on the property of rubber composites, comparison in the property of the composites of W-EPDM with those of virgin and devulcanized EPDM, and waste tire rubber were investigated. Also, the properties of the rubber composites extruded with a 12-screw extruder were compared with those extruded with twin-screw extruder. Various W-EPDM composites for synthetic turf filler and car mat were extruded and injection molded, and 3 main properties of tensile strength, elongation and hardness were investigated to develop economical and proper recipes of the rubber composites.

Studies on the Physical properties and Application of EPDM-Polymer Blends. Part 5. Physical Properties for EPDM-CR Blends (EPDM과 각종(各種) Polymer의 Blend에 의(依)한 성능변화(性能變化) 및 그 응용(應用)에 관(關)한 연구(硏究) (제5보(第5報)) EPDM과 Chloroprene Rubber의 Blend에 대(對)하여)

  • Kim, Joon-Soo
    • Elastomers and Composites
    • /
    • v.7 no.2
    • /
    • pp.175-182
    • /
    • 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-CR blends. The results are shown as follows: 1. In blending, tensile strength decreased with increase in EPDM contents and decreasing value was good results than various EPDM blending. 2. As EPDM Addition ratio is increased physical properties such as elongation have also improved, on the other hand, hardness and abrasion resistance decreased. 3. Aging resistance is less influenced by blending. 4. Tear strength is less influenced by blending and character after aging exhibited the same result. 5. Ozone resistance was much improved after blending. It was effective more than the ratio of EPDM/CR is 25/75.

  • PDF