Synthesis of narrow-distribution polycyclopentene using a ruthenium ring-opening metathesis initiator

Myers, Sasha B.; Register, Richard A.

doi:10.1016/j.polymer.2008.01.009

Cited by 31 publications

(45 citation statements)

References 28 publications

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“…[48][49][50] Herein, we extend our study towards the ROMP of cyclopentene and its functionalized derivatives using phase separable PIB second generation Ru complex 8. The increased stability and robustness of the soluble Ru complex 8 facilitates an easy separation of the product form the ruthenium complex.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Polypentenamer and Poly(Vinyl Alcohol) with a Phase‐Separable Polyisobutylene‐Supported Second‐Generation Hoveyda–Grubbs Catalyst

et al. 2015

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Equilibrium ring opening metathesis polymerization (ROMP) of strained cyclic olefins using a soluble supported second generation Ru complex has been investigated. Cycloolefin homoand copolymers are of great academic and industrial importance due to their interesting applications as packaging materials, adhesives in coatings and optoelectronics. The supported complex exhibits good chemical stability and was effective in ROMP of strained cyclic olefins. In addition, the complex is easily phase separated from the product resulting in lower residual ruthenium in the final polymer product compared with the homogeneous complex.

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Section: Resultsmentioning

confidence: 99%

Synthesis of Polypentenamer and Poly(Vinyl Alcohol) with a Phase‐Separable Polyisobutylene‐Supported Second‐Generation Hoveyda–Grubbs Catalyst

et al. 2015

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“…There are only a few examples for ruthenium based catalyst systems such as RuCl 2 (p-cymene)(PR 2 R 0 ) 9 and carbynehydridoruthenium 10 complexes. The ring-opening metathesis polymerization of cyclopentene using well dened catalysts 1 11 and 2 12 has also been reported (Scheme 2). The main advantages of the application of well-dened ruthenium catalysts compared to other reported systems (i.e.…”

Section: Introductionmentioning

confidence: 98%

“…[9][10][11][12]16,18 Yet the ruthenium catalyzed cyclopentene polymerization studies are rare. There are only a few examples for ruthenium based catalyst systems such as RuCl 2 (p-cymene)(PR 2 R 0 ) 9 and carbynehydridoruthenium 10 complexes.…”

Section: Introductionmentioning

confidence: 99%

Ruthenium catalyzed equilibrium ring-opening metathesis polymerization of cyclopentene

2013

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Polypentenamer was synthetized by equilibrium ring-opening metathesis polymerization (ROMP) using well-defined ruthenium catalyst systems. It was found that the equilibrium time is influenced by the catalyst loading or the catalyst activity, however as expected, the overall cyclopentene conversion is determined only by the applied reaction temperature. Equilibrium of the growing chain and monomer was observed and the activation enthalpy and entropy were determined as: DH ¼ À5.6 kcal mol À1 ;. So far these values are the lowest which are reported for cyclopentene polymerization catalyst systems. This unique feature of the equilibrium polymerization opens a way for the synthesis of durable, environmentally friendly elastomers where tires can be not only synthetized but also readily recycled by the same transition metal catalyst system.

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“…29 Because of low ring strain, the ROMP of CPE is a more difficult process; 28 a major hurdle is the competing acyclic diene metathesis (ADMET), a major side reaction which increases oligomer concentration. 28,30 Sanford et al have shown that the addition of "cocatalyst" (excess ligand) to the polymerization is necessary to shift the equilibrium toward polymer propagation. 28,31 On the other hand, with excellent moisture/air tolerance though with less activity, Ru-based Grubbs' catalysts give high-trans polymers with good isotactic bias.…”

Section: ■ Introductionmentioning

confidence: 99%

“…28,30 Sanford et al have shown that the addition of "cocatalyst" (excess ligand) to the polymerization is necessary to shift the equilibrium toward polymer propagation. 28,31 On the other hand, with excellent moisture/air tolerance though with less activity, Ru-based Grubbs' catalysts give high-trans polymers with good isotactic bias. 32,33 Unfortunately, Ru-based ROMPs of norbornenes have not been as extensively studied as compared to Shrock's catalyst.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Polyolefin/Layered Silicate Nanocomposites via Surface-Initiated Ring-Opening Metathesis Polymerization

Kalluru

Cochran

2013

Macromolecules

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Here we report the synthesis and characterization of block copolymer/layered silicate (BCPLS) nanocomposites via the surface-initiated ring-opening metathesis polymerization (SI-ROMP) of norbornene and cyclopentene from montmorillonite clay (MMT). The MMT particle surfaces were functionalized with a norbornene-terminated alkylammonium surfactant through ion exchange. Block copolymer brushes of norbornene and cyclopentene were polymerized directly from the surface of these functionalized clay platelets, yielding highly exfoliated nanocomposites. A fraction of the polymer brushes were removed from their substrate by reverse ion exchange and characterized in parallel with their corresponding nanocomposite analogues. The thermal, mechanical, and morphological characteristics of the BCPLSs and their neat analogues were then compared directly. This enabled us to assess the role of the MMT filler in the thermal properties, solid/melt state rheology, and morphology. Disciplines Polymer Science CommentsReprinted with permission from Macromolecules 46 (2013) ABSTRACT: Here we report the synthesis and characterization of block copolymer/layered silicate (BCPLS) nanocomposites via the surface-initiated ring-opening metathesis polymerization (SI-ROMP) of norbornene and cyclopentene from montmorillonite clay (MMT). The MMT particle surfaces were functionalized with a norbornene-terminated alkylammonium surfactant through ion exchange. Block copolymer brushes of norbornene and cyclopentene were polymerized directly from the surface of these functionalized clay platelets, yielding highly exfoliated nanocomposites. A fraction of the polymer brushes were removed from their substrate by reverse ion exchange and characterized in parallel with their corresponding nanocomposite analogues. The thermal, mechanical, and morphological characteristics of the BCPLSs and their neat analogues were then compared directly. This enabled us to assess the role of the MMT filler in the thermal properties, solid/melt state rheology, and morphology.

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Synthesis of narrow-distribution polycyclopentene using a ruthenium ring-opening metathesis initiator

Cited by 31 publications

References 28 publications

Synthesis of Polypentenamer and Poly(Vinyl Alcohol) with a Phase‐Separable Polyisobutylene‐Supported Second‐Generation Hoveyda–Grubbs Catalyst

Synthesis of Polypentenamer and Poly(Vinyl Alcohol) with a Phase‐Separable Polyisobutylene‐Supported Second‐Generation Hoveyda–Grubbs Catalyst

Ruthenium catalyzed equilibrium ring-opening metathesis polymerization of cyclopentene

Synthesis of Polyolefin/Layered Silicate Nanocomposites via Surface-Initiated Ring-Opening Metathesis Polymerization

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