• Title/Summary/Keyword: 단일알킬화

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Characteristics and Ring-Opening Isomerization Polymerization of 2-(1,3,3-Trimethyl-6-azabicyclo[3,2,1]-oct-6-yl)-4,5-dihydro-1,3-oxazoline (TAO) (2-(1,3,3-Trimethyl-6-azabicyclo[3,2,1]-oct-6-yl)-4,5-dihydro-1,3-oxazoline(TAO)의 개환이성화중합과 특성평가)

  • Lee, Chan-Woo;Chung, Jin-Do
    • Polymer(Korea)
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    • v.36 no.3
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    • pp.262-267
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    • 2012

  • 2-(1,3,3-Trimethyl-6-azabicyclo [3,2,1]-oct-6-yl)-4,5-dihydro-1,3-oxazoline (TAO) was polymerized at several conditions to clarify the influence of initiators, alkyl halide ($PhCH_2Br$, $PhCH_2Cl$, MeI) and sulfonate (MeOTf). The reactions were conducted at $100^{\circ}C$ for 24 h. The resultant polymer forms several kinds of structures with different combination of initiators. The sole MeOTf initiator caused chain transfer reaction to form the one-order structure for which the resultant polymer exclusively formed pendant structure, while alkyl halide and MeOTf formed two kinds of structures, pendant and main chain, which is caused by partly-proceeded double isomerization polymerization by highly reactive nucleophilic counter anion of halogen. Merrifield polymer was also utilized as an intiator and copolymerized with TAO, which produced a graft structure.

  • https://doi.org/10.7317/pk.2012.36.3.262 인용 PDF KSCI

A Study on The Preparation of Poly(alkyl methacrylate-co-maleic anhydride) as Cold Flow Improvers for Biodiesel Fuels (바이오디젤용 저온 유동성 향상제로서의 폴리 (알킬메타크릴레이트-공-무수말레인산) 제조 연구)

  • Hong, Jin-Sook;Chung, Keun-Wo;Kim, Young-Wun;Kim, Nam-Kyun;Im, Dae-Jae
    • Applied Chemistry for Engineering
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    • v.23 no.2
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    • pp.232-240
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    • 2012

  • Bio-diesel (BD) is the mono alkyl esters of long chain fatty acids derived from renewable feed stocks like vegetable oils or animal fats. Bio-diesel shows poorer fuel properties than that of diesel fuel in a cold condition. For the diesel fuel, many cold flow improvers have been developed; however, since primary ingredients of bio-diesel are different from those of the diesel fuel, there is a limit to the cold flow improvement when the same cold flow improvers are added to bio diesel. In this study, to improve low temperature properties of bio-diesel, we developed a cold flow improver using an alkyl methacrylate monomer, prepared via ester reaction, and maleic anhydride and also conducted a ring opening reaction using amine. We characterized the products using $^1H-NMR$, FT-IR and GPC methods. In addition, the cold flow improvements of the products in Soybean BD and Palm BD in the concentration rage of 1000~10000 ppm were investigated. It was found that the addition of LMA2SMA6MA2-C8A in Soybean BD improved the pour point by $12.5\;^{\circ}C$.

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