• Title, Summary, Keyword: Poly(ethylene-co-octene)

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Effect of Polymer Concentration and Solvent on the Phase Behavior of Poly(ethylene-co-octene) and Hydrocarbon Binary Mixture (Poly(ethylene-co-octene)과 탄화수소 2성분계 혼합물의 상거동에 대한 고분자 농도 및 용매의 영향)

  • Lee, Sang-Ho;Chung, Sung-Yun;Kim, Hyo-Jun;Park, Kyung-Gyu
    • Elastomers and Composites
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    • v.39 no.4
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    • pp.318-323
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    • 2004
  • Cloud-point and bubble-point curves for poly(ethylene-co-13.8 mol% octene) ($PEO_{13.8}$) and Poly(ethylene-co-15.3 mol% octene) ($PEO_{15.3}$) were determined up to $150^{\circ}C$ and 450 bar in hydrocarbons which have different molecular size and structure. Whereas ($PEO_{15.3}$+ n-pentane) system has cloud-point and bubble-point type transitions, ($PEO_{15.3}$+ n-propane) and ($PEO_{15.3}$+ n-butane) systems do only cloud-point type transition. In cyclo-pentane, -hexane, -heptane, and -octane, $PEO_{15.3}$ has a bubble-point transition. ($PEO_{13.8}$+ n-butane) mixture has a critical mixture concentration at 5 wt% PEO. (PEO + hydrocarbon) mixtures exhibit LCST type behavior. Solubility of PEO increases with hydrocarbon size due to increasing dispersion interaction which is favorable to dissolve PEO.

Phase Behavior of Ternary Mixture of Poly(ethylene-co-octene) - Ethylene - 1-Octene (Poly(ethylene-co-octene) - Ethylene - 1-Octene 3성분계 혼합물의 상거동)

  • Lee, Sang-Ho;Sohn, Jin-Eun;Chung, Sung-Yoon;Han, Sang-Hoon
    • Elastomers and Composites
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    • v.41 no.2
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    • pp.116-124
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    • 2006
  • Cloud-point data to $160^{\circ}C$ and 1,000 bar are presented with poly(ethylene-co-15.3 mole% octene) copolymers ($PEO_{15}$) in pure 1-octene and mixtures of ethylene - 1-octene. The cloud-point curves for $PEO_{15}$ - ethylene - 1-octene mixture dramatically increase in pressure to as high as 1,000 bar with an increasing ethylene concentration. At ethylene concentrations less than 18 wt%, the ternary mixture has bubble- and cloud-point curves. As the ethylene concentration of the ternary mixture increases, the bubble-point curve and the single-phase region reduce. The reduction in the single phase region with increasing ethylene concentrations is the result of reduced dispersion interactions between $PEO_{15}$ and the mixed solvent. The single-phase region decreases with increasing temperatures when ethylene concentrations are lower than 36 wt%, whereas the single-phase region increases with temperatures at ethylene concentrations greater than 50 wt%. At ethylene concentrations greater than 50 wt% the effect of the polar interactions of the mixed solvent, which is unfavorable to dissolve PEO, is greater than the effect of the density of the mixed solvent. Therefore, the cloud-point pressures increase with a decreasing temperature. However, at ethylene concentrations less than 50 wt%, the cloud-point pressures decrease with temperature, because the effect of the polar interactions is less than the density effect.

Effect of Poly(propylene-co-octene) as a Compatibilizer on Mechanical Properties and Weldline Characteristics of Polypropylene/Poly(ethylene-co-octene) Blends (폴리프로필렌/에틸렌-옥텐 공중합체 블렌드의 기계적 성질 및 웰드라인 물성에 미치는 폴리프로필렌-옥텐 공중합체의 영향에 관한 연구)

  • Koo, Hyo-Seon;Son, Young-Gon
    • Elastomers and Composites
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    • v.46 no.3
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    • pp.251-256
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    • 2011
  • Effect of poly(propylene-co-octene) as a compatibilizer in toughened polypropylene/ poly(ethylene-co-octene) (EOC) was investigated. The EOCs used were metallocene catalyzed commercial linear low density polyethylene and they are elastomeric materials. The poly(propylene-co-octene) was synthesized by metallocene catalyst in our laboratory to be used as a compatibilizer in PP/EOC blends. PP/EOC blends without compatibilizer shows very low mechanical properties in specimens with weldlines while incorporation of a compatibilizer significantly increases the mechanical properties of specimens with weldlines. However, compatibilized PP/EOC blends does not show increased impact property in a weldline free specimen and it is attributed to low molecular weight of the poly(propylene-co-octene) synthesized in present study. It is expected that the poly(propylene-co-octene) having increased molecular weight provides very good performance as an effective compatibilizer in toughened polypropylene/EOC blends.

Phase Behavior Study of Poly(ethylene-co-octene) in normal-Hydrocarbons

  • Kwon, Hyuk-Sung;Lee, Sang-Ho
    • Elastomers and Composites
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    • v.38 no.1
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    • pp.51-56
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    • 2003
  • Cloud-point and bubble-point data to $170^{\circ}C$ and 50 bar are presented for four different solvents, normal pentane. n-hexane, n-heptane, and n-octane with poly(ethylene-co-42 wt% octene) ($PEO_{42}$) copolymer. The pressure-concentration isotherms measured for $PEO_{42}$ - normal pentane have maximums at around 5 wt% of the copolymer concentrations in the solution. $PEO_{42}$- normal pentane system exhibits LCST-type phase behavior at temperatures greater than $130^{\circ}C$. Below $120^{\circ}C$, bubble-point type transitions are observed. However, the binary mixtures for $PEO_{42}$ in n-hexane, n-heptane, and n-octane have only bubble-point type transitions at the pressure-temperature region investigated in this study. The single-phase region of PEO - alkane mixtures increases with the molecular size of alkane solvent due to the increasing dispersion interactions between PEO and the alkane.

Effect of Polymer Backbone Architecture on the Phase Behavior of Poly(ethylene-co-octene) + cyclo-Hydrocarbon Mixtures (Poly(ethylene-co-octene) /고리형탄화수소 2성분계 혼합물의 상거동에 대한 고분자 사슬구조의 영향)

  • Lee, Sang-Ho;Chuug, Sung-Yun;Sohn, Jin-Eun
    • Elastomers and Composites
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    • v.40 no.4
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    • pp.277-283
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    • 2005
  • LV transition curves for poly(ethylene-co-15.3 mol% octene) ($PEO_{15}$) and poly(ethylene- co-17.0 mol% octene) ($PEO_{17}$) were measured in cyclo-pentane and cyclo-hexane. Between $40{\sim}150^{\circ}C$, the LV curve for ($PEO_{15}$ + cyclo pentane) located $1.1{\sim}2.7$ bar higher than that for ($PEO_{17}$+ cyclo-pentane). In cyclo-hexane, similar behavior was observed for $PEO_{15}$ and $PEO_{17}$ solution except the pressure difference reduced to $0.9{\sim}l.6$ bar. If the backbone structure of $PEO_{15}$ were identical to that of $PEO_{17}$, the LV line for $PEO_{17}$ would locate at high pressures than that for $PEO_{15}$, since the number average molecular weight of $PEO_{17}$ (Ave. Mn=153,040) is 1.9 times higher 4han that of $PEO_{15}$ (Ave. Mn=82,200). The difference in the octene comonomer content between $PEO_{15}$ and $PEO_{17}$ is only 1.7 mole%, nevertheless this small difference in the backbone structure of the PEO greatly affected the location of the L-V curves in the mixtures comprised of PEO and cyclo-alkane.

Mechanical and Morphological Properties of Poly(acrylonitrile-butadiene-styrene) and Poly(lactic acid) Blends (아크릴로니트릴-부타디엔-스티렌 공중합체와 폴리유산과의 블렌드에 대한 기계적 물성 및 모폴로지)

  • Lee, Yun Kyun;Kim, Ji Mun;Kim, Woo Nyon
    • Korean Chemical Engineering Research
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    • v.49 no.4
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    • pp.438-442
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    • 2011
  • Mechanical and morphological properties of poly(acrylonitrile-butadiene-styrene) (ABS) and poly(lactic acid) (PLA) blends containing compatibilizers were investigated. Poly(styrene-acrylonitrile)-g-maleic anhydride) (SAN-g-MAH), poly(ethylene-co-octene) rubber-maleic anhydride (EOR-MAH) and poly(ethylene-co-glycidyl methacrylate) (EGMA) were used as compatibilizers. Mechanical properties such as tensile, flexural and impact strengths of ABS/PLA (80/20, wt%) blends were found to be increased when the SAN-g-MAH, EOR-MAH and EGMA were used. The maximum values for mechanical properties of the ABS/PLA (80/20) blend were observed when SAN-g-MAH was used as a compatibilizer at the concentration of 3 phr. From morphological studies of the ABS/PLA (80/20) blends, PLA droplet size was decreased by the addition of the compatibilizers used in this study. From the results of mechanical and morphological properties of the ABS/PLA (80/20) blends, SAN-g-MAH (3 phr) was found to be the most effective compatibilizer among the compatibilizers used in this study.

Crystallization Behavior and Mechanical Properties of High Density Polyethylene/metallocene catalyzed Poly(ethylene-co-octene) Blends (고밀도 폴리에틸렌/폴리에틸렌-옥텐 공중합체 블렌드의 결정화 거동 및 기계적 물성에 관한 연구)

  • Son, Younggon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.6
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    • pp.3108-3113
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    • 2013
  • Compatibility between mLLDPE and HDPE was investigated by observing the crystallization behavior and mechanical properties of their blends. HDPE and mLLDPE blends were prepared by a melt-blending with compositions of 100/0, 80/20, 60/40, 40/60/ 20/80 and 0/100. Four different mLLDPEs containing various octene contents (4.1, 6.8, 9.8 및 12.5 mol.%) were investigated. The melting temperature and crystallization peak temperature of the blends were measured by DSC and the mechanical properties were measured in an universal testing machine. By observation that the melting and crystallization peak temperatures of one component were affected by its counterparts, it was revealed that HDPE and mLLDPE are miscible or at leat partially miscible at molten state. It was also found that the crystalline phase of mLLDPE contains HDPE crystals. However. it was not clear that mLLDPE was cocrystalized in the crystalline phase of HDPE. By various investigation with DSC and mechanical properties, it was concluded that the compatibility between mLLDPE and HDPE decreases with the octene content in the mLLDPE.