• Title/Summary/Keyword: styrene

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Measurement and Prediction of Combustion Properties of Styrene (스티렌의 연소특성치 측정 및 예측)

  • Ha, Dong-Myeong;Na, Byeong-Gyun
    • Journal of the Korean Institute of Gas
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    • v.17 no.4
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    • pp.70-76
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    • 2013
  • For the safe handling of styrene, this study was investigated the explosion limits of styrene in the reference data. The flash points and AITs(auto-ignition temperatures) by ignition delay time were experimented. As a results, the lower and upper explosion limits of styrene recommended 0.9 Vol.% and 8.0 Vol.%, respectively. The lower flash points of styrene by using closed-cup tester were experimented $29^{\circ}C{\sim}31^{\circ}C$. The lower flash points of styrene by using open cup tester were experimented $32^{\circ}C{\sim}36^{\circ}C$. This study measured relationship between the AITs and the ignition delay times by using ASTM E659 tester for styrene. The experimental AIT of styrene was $460^{\circ}C$.

Synthesis of Poly(styrene carbonate) and Preparation of Styrene Carbonate by Thermal Degradation (Poly(styrene carbonate)의 합성 및 열분해에 의한 styrene carbonate의 제조)

  • Lee, Yoon Bae;Shin, Eun Jung;Yoo, Jin Yi
    • Applied Chemistry for Engineering
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    • v.19 no.1
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    • pp.133-136
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    • 2008
  • In order to decrease carbon dioxide, one of the green house gas, poly(styrene carbonate) has been synthesized from carbon dioxide and styrene oxide with zinc glutarate as a catalyst. The polymer has been identified as an alternating copolymer by spectroscopic analysis, FT-IR, $^1H$-NMR, and $^{13}C$-NMR. The number average molecular weight ($M_n$) of the polymer is $5.0{\times}10^4g/mol$ and the glass transition temperature ($T_g$) is $88^{\circ}C$ and its melting point ($T_m$) is $240^{\circ}C$. The cyclic carbonate, styrene carbonate, has been obtained by thermal degradation of the polymer via the unzipping mechanism.

Inhibition Effects of Toxic Solvent Mixture in Catalytic Oxidation Process (유독성 유기용매의 촉매산화공정에서 혼합조성에 따른 간섭효과)

  • 이승범;김원일;홍인권;김형진
    • Journal of environmental and Sanitary engineering
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    • v.16 no.3
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    • pp.72-79
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    • 2001
  • The selective catalytic oxidation of toxic aromatic solvents (benzene, toluene, ethylbenzene, and styrene) and their mixtures were studied on a $Pt/{\;}{\gamma}-Al_2O_3$ catalyst at temperature ranging from $160~350^{\circ}C$. The deep conversion of aromatic solvents was increased as the inlet concentration was decreased and the reaction temperature was increased. The reactivity increases in order benzene > toluene > ethylbenzene > styrene. In mixture, remarkable effects on reaction rate and selectivity have been evidence ; the strongest inhibition effect is shown by styrene and increase in a reverse order with respect to that of reactivity. The inhibition effect was increased in order styrene > ethylbenzene > toluzene > benzene. This trend is due to the competition adsorption between the two or three reactants on the oxidized catalyst. Also, the deep conversion change of benzene was a small in tertiary mixtures(including of benzene and styrene) comparing with conversion characteristics of binary mixture with styrene. This result was due to small concentration of styrene. which had very strong inhibition effect.

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Synthesis of Cyclic Styrene Carbonate via Pyrolysis of Poly(styrene carbonate) (Poly(styrene carbonate)의 열분해에 의한 고리형 Styrene Carbonate의 합성)

  • Yoo, Jin-Li;Shin, Eun-Jung;Koo, Dae-Chul;Lee, Yoon-Bae
    • Proceedings of the KAIS Fall Conference
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    • 2006.05a
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    • pp.569-571
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    • 2006
  • 지구의 온난화를 가속시키는 주요물질인 이산화탄소($CO_2$)와 styrene oxide를 Zinc Glutarate를 촉매로 하여 800-1000psi, $750^{\circ}C$에서 반응시켜 합성한 Poly(styrene carbonate)(PSC)를 질소분위기하 $750^{\circ}C$에서 열분해하여 고리형 styrene carbonate를 합성하였다. 생성물은 GC-Mass로 분석하여 확인하였다.

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Styrene Oxide에서 2-Phenylethanol(PEA)를 생성하는 Pseudomonas putida Strain 2150-2의 분리 및 동정

  • 양인영;황순옥
    • Microbiology and Biotechnology Letters
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    • v.24 no.2
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    • pp.155-159
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    • 1996
  • The strain which produces 2-phenylethanol (PEA) from styrene oxide was isolated from soil samples near Ulsan PO/SM plant. The isolated strain was identified as Pseudomonas putida through its morphological, physiological characteristics, and DNA G+C contents. Its metabolic pathway from styrene oxide to 2-phenylethanol was studied and it was found that styrene oxide was transformed to phenylacetaldehyde, to 2phenylethanol (PEA), and then to phenylacetic acid by this strain.

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Copolymerization of Phenyl Acetylene with Styrene (Phenyl Acetylene과 Styrene의 共重合)

  • Hyung Chick Pyun;Jaerok Kim;Woong-Moo Lee
    • Journal of the Korean Chemical Society
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    • v.13 no.4
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    • pp.387-393
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    • 1969
  • Gamma-ray induced copolymerization of phenyl acetylene with styrene is compared with that of the Ziegler catalyzed. The reactivity of styrene is greater than that of phenyl acetylene in the gamma-ray induced polymerization but much less than that of phenyl acetylene in the Ziegler catalyzed. The resulting copolymer is identified by means of DTA and spectrophotometry. Further, the liquid scintillation counting of styrene-${\alpha}-C^{14}$clarified the relative composition of the copolymers.

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해외정보

  • Korea Foam-Styrene Recycling Association
    • 환경사랑
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    • s.50
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    • pp.10-11
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    • 2007
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