Photolatent ring-opening metathesis polymerization in miniemulsion: a powerful approach to produce polynorbornene latexes

Pichavant, Loïc; Lacroix‐Desmazes, Patrick; Chemtob, Abraham; Pinaud, Julien; Héroguez, Valérie

doi:10.1039/c8py01011k

Cited by 10 publications

(9 citation statements)

References 35 publications

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“…In this study, all the miniemulsions were performed in a photo-reactor equipped with an airtight sonication probe and prepared with a dispersed phase content of 10 w/w % following a process similar to that previously described 19 D: the average diameter, σ: the standard deviation.…”

Section: 3-nb Miniemulsion Rompmentioning

confidence: 99%

“…Nb conversion reached only 36 % after 60 min ( Figure 2 blue curve) which is comparable to the conversion obtained in the previous study. 19 Scheme 1: Formation of PNb latex Sonication 2 min initial droplet size sonication 2 min final particle size sonication 10 min initial droplet size Sonication 10 min final particle size analyses (Table 1). For all polymer samples, experimental average molar masses were much higher than the theoretical ones, indicating a poor initiation efficiency of the polymerization.…”

Section: 1-miniemulsion Romp In Annular Reactormentioning

confidence: 99%

“…18 Furthermore, we showed that such photolatent system was also able to trigger the photoROMP of Nb in miniemulsion. 19 However, only 40 % conversion were achieved whatever the Miniemulsion Photo-reactor…”

Section: -Introductionmentioning

confidence: 99%

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Polynorbornene latex synthesis by UV-triggered Ring-Opening Metathesis Polymerization in miniemulsion

Pichavant

Lacroix‐Desmazes

Chemtob

et al. 2020

Polymer

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An innovative route based on a novel photo-latent ROMP initiator has been explored to synthesize polynorbornene latex particles in miniemulsion. Operation conditions were strongly improved by the use of an annular LED photo-reactor, increasing the uniformity of radiation distribution and enabling to control atmosphere and stirring throughout irradiation. Several parameters (droplet size, irradiance, pre-catalyst structure) were studied in order to improve the monomer conversion profiles, which eventually led to the production of latex with high norbornene conversion (> 90 %) and 10 % solids content. Particular attention was paid to the polymer microstructure, which was found to be highly dependent on the type of initiation mechanism.

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Section: 3-nb Miniemulsion Rompmentioning

confidence: 99%

Section: 1-miniemulsion Romp In Annular Reactormentioning

confidence: 99%

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Polynorbornene latex synthesis by UV-triggered Ring-Opening Metathesis Polymerization in miniemulsion

Pichavant

Lacroix‐Desmazes

Chemtob

et al. 2020

Polymer

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“…[27] Pichavant et al also recently reported a different approach to overcome the inherent problem of high catalyst activity in the miniemulsion at room temperature by designing a photolatent ROMP catalytic system. [28] They demonstrated the successful preparation of stable PNB latexes (≈100 nm particle diameter) using catalysts based on a N-heterocyclic carbene (NHC) photogenerating system.…”

Section: Block Copolymersmentioning

confidence: 99%

“…Using this catalyst it was possible to develop a robust procedure to obtain stable latexes of PCOD and PNB, with particles in the range from 100 to 300 nm, with ≈100% conversion and relative short times, using either ionic or nonionic surfactants . Pichavant et al also recently reported a different approach to overcome the inherent problem of high catalyst activity in the miniemulsion at room temperature by designing a photolatent ROMP catalytic system . They demonstrated the successful preparation of stable PNB latexes (≈100 nm particle diameter) using catalysts based on a N‐heterocyclic carbene (NHC) photogenerating system.…”

mentioning

confidence: 99%

Synthesis of Diblock and Triblock Polymers from Cyclooctadiene and Norbornene Via ROMP in Miniemulsion

Torres‐Rocha

Zhu

et al. 2019

Macromol. Rapid Commun.

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The synthesis of diblock and triblock linear polyolefins via ring opening metathesis polymerization (ROMP) in an aqueous nanoparticle dispersion is presented. The different block polyolefins are synthesized from the cyclic olefins 1,5‐cyclooctadiene and norbornene (NB), using a water‐soluble TEGylated ruthenium alkylidene catalyst, yielding the structures PCOD‐b‐PNB, PNB‐b‐PCOD, and PCOD‐b‐PNB‐b‐PCOD. High monomer conversion (>90%), monitored by NMR, is achieved in relatively short times (≈1 h) for the polymerization of each block. The livingness of the system, essential to obtain block copolymers, is confirmed by gel permeation chromatography. Latex particles' size during the multiple steps range between 90 and 150 nm. The results demonstrate that it is possible to obtain nanoparticle latexes from ROMP‐based monomers with block copolymer architectures, creating the opportunity to copolymerize olefins bearing different functional groups for the synthesis of new materials.

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Polymerizations in Aqueous Dispersed Media

Sanders

Cunningham

2022

Macromolecular Engineering

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Heterogeneous polymerizations in aqueous media remain an active area of research with an emphasis on control over polymer architecture and molecular weight. Previously established methods to perform reversible deactivation radical polymerizations have been expanded and will be covered in this article. Recent strategies employ novel catalysts, functional surfactants, and multistep processes to yield stable, and in some cases, high solids content, latexes through a variety of nonconventional chemistries. Moreover, polymerization‐induced self‐assembly has been developed to yield high‐order morphologies in aqueous dispersions in mild conditions. Photoinduced polymerization techniques have seen increasing interest owing to the “green” benefits of using light as a stimulus for polymerization. The goals in this field remain to provide control over polymerizations in aqueous dispersed media while reducing both monetary and environmental costs. This article will cover recent developments in producing water‐based polymer dispersions with control over nanoparticle morphology and functionality and macromolecular structure.

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Photolatent ring-opening metathesis polymerization in miniemulsion: a powerful approach to produce polynorbornene latexes

Abstract: The use of miniemulsion Ring-Opening Metathesis Polymerization (ROMP) to form polyunsaturated latexes is still a largely unexplored field.

Cited by 10 publications

References 35 publications

Polynorbornene latex synthesis by UV-triggered Ring-Opening Metathesis Polymerization in miniemulsion

Polynorbornene latex synthesis by UV-triggered Ring-Opening Metathesis Polymerization in miniemulsion

Synthesis of Diblock and Triblock Polymers from Cyclooctadiene and Norbornene Via ROMP in Miniemulsion

Polymerizations in Aqueous Dispersed Media

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