Ring-opening metathesis polymerization of monocyclic alkenes using molybdenum and tungsten alkylidene (Schrock-type) initiators and 13C nuclear magnetic resonance studies of the resulting polyalkenamers

Dounis, Panagiotis; Feast, W. J.; Kenwright, Alan M.

doi:10.1016/0032-3861(95)93658-9

Cited by 84 publications

(68 citation statements)

References 9 publications

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“…The ctc and tct peaks should be relatively low intensity and be overlapped by the ttt and ccc peaks respectively. 19 An expanded spectrum of the C 3 -C 8 regions is shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization

Çetinkaya

Karabulut

Düz

et al. 2005

Applied Organom Chemis

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A typical low-strain monomer, cyclooctene, was polymerized via ring-opening metathesis polymerization with electrochemically produced active species. The structural properties of the polyoctenamer were determined by NMR, gel-permeation chromatography and differential scanning calorimetry. Analysis of the polyoctenamer microstructure by 1 H and 13 C NMR spectroscopy indicates that the polymer contains a highly cis stereoconfiguration of the double bonds (σ c = 0.75). The resulting polymer is of low molecular weight and has a reasonably broad molecular weight distribution (M w = 18 000, PDI = 1.9). The glass transition temperature and melting point of the polyoctenamer are −11.3 • C and 36.5 • C respectively.

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“…The ctc and tct peaks should be relatively low intensity and be overlapped by the ttt and ccc peaks respectively. 19 An expanded spectrum of the C 3 -C 8 regions is shown in Fig. 5.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization

Çetinkaya

Karabulut

Düz

et al. 2005

Applied Organom Chemis

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“…2C). Thus, the C=C bonds have cis-configuration, although metathesis polymerization of cycloheptene and cyclooctene usually leads to polymers with a mixed cis/trans configuration [16]. The observation of the same additional resonances of low intensity (a' -g') as for the ROP product must be noted.…”

Section: Resultsmentioning

confidence: 96%

Novel unsaturated ε-caprolactone polymerizable by ringopening and ring-opening metathesis mechanisms

et al. 2002

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Ring-opening polymerization (ROP) and ring-opening metathesis polymerization (ROMP) of an unsaturated ε-caprolactone, 6,7-dihydro-2(3H)-oxepinone (DHO2), are alternative routes to produce unsaturated aliphatic polyesters with the same molecular structure. Polymerization of DHO2 initiated by Al isopropoxide in toluene at room temperature or at 0°C proceeds by a coordination-insertion mechanism, although intramolecular transesterification takes place beyond complete monomer conversion. The molecular weight distribution is narrow as long as monomer conversion does not exceed 90%. Ring-opening metathesis polymerization of DHO2 initiated by Schrock's Mo-based catalyst, 1, at 60°C allows higher molecular weight unsaturated polyester to be prepared, even though an intramolecular side reaction also operates. The structure of poly(DHO2) synthesized by ROP and ROMP is the same, as confirmed by 1 H, 13 C NMR, and FT-IR spectra. Copolymers of DHO2 with norbornene, cis-cyclooctene, and 1,5-cyclooctadiene have been successfully prepared.

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“…ROMP of cyclic olefins is applied for the synthesis of polyalkenamers since many years [9,[15][16][17], as shown in Fig. 4.…”

Section: Rubber Synthesismentioning

confidence: 99%

Olefin metathesis meets rubber chemistry and technology

Leimgruber

Trimmel

2015

Monatsh Chem

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This article summarizes possible applications of olefin metathesis in rubber chemistry and technology. There are three main research directives with valuable contributions to the synthesis, recycling, and characterization of elastomers. First, ring opening metathesis polymerization as well as acyclic diene metathesis polycondensation yields polyalkenamers with cross-linkable double bonds, and thus can be used for the synthesis of defined rubbers serving as raw materials in rubber technology. Secondly, by cross metathesis reaction, natural rubber (and synthetic rubber) can be functionalized resulting in telechelic polymers or small molecule specialty chemicals. Thirdly, olefin metathesis offers the possibility of degrading the cross-linked rubber network into smaller soluble pieces, enabling different analytical possibilities such as characterization of cross-linking sites, determination of rubber, rubber additives and carbon black, and exploration of the rubber-metal adhesive interface. Additionally, this route can also be used for recycling of rubber products. Graphical abstract

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Ring-opening metathesis polymerization of monocyclic alkenes using molybdenum and tungsten alkylidene (Schrock-type) initiators and 13C nuclear magnetic resonance studies of the resulting polyalkenamers

Cited by 84 publications

References 9 publications

Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization

Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization

Novel unsaturated ε-caprolactone polymerizable by ringopening and ring-opening metathesis mechanisms

Olefin metathesis meets rubber chemistry and technology

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Ring-opening metathesis polymerization of monocyclic alkenes using molybdenum and tungsten alkylidene (Schrock-type) initiators and 13C nuclear magnetic resonance studies of the resulting polyalkenamers

Cited by 84 publications

References 9 publications

Synthesis and characterization of polyoctenamer with WCl6e−AlCH2Cl2 catalyst system via ring‐opening metathesis polymerization

Synthesis and characterization of polyoctenamer with WCl6e−AlCH2Cl2 catalyst system via ring‐opening metathesis polymerization

Novel unsaturated ε-caprolactone polymerizable by ringopening and ring-opening metathesis mechanisms

Olefin metathesis meets rubber chemistry and technology

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Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization

Synthesis and characterization of polyoctenamer with WCl₆e⁻AlCH₂Cl₂ catalyst system via ring‐opening metathesis polymerization