Latent and Delayed Action Polymerization Systems

Naumann, Stefan; Buchmeiser, Michael R.

doi:10.1002/marc.201300898

Cited by 83 publications

(79 citation statements)

References 146 publications

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“…Under similar conditions, but at room temperature, the reaction provided traces of PNBD (entry 10). Such reactivity resembles that of latent catalysts [25]. In bulk, traces of polymers were obtained in the presence or absence of AgBF 4 , and even under reflux (entries 11-13).…”

Section: Polymerization Reactionsmentioning

confidence: 73%

Metathesis Polymerization Reactions Induced by the Bimetallic Complex (Ph4P)2[W2(μ-Br)3Br6]

et al. 2015

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Abstract:The reactivity of the bimetallic complex (Ph 4 P) 2 [W 2 (µ-Br) 3 Br 6 ] ({W 2.5 W} 7+ , a 12 e 3 ) towards ring opening metathesis polymerization (ROMP) of norbornene (NBE) and some of its derivatives, as well as the mechanistically related metathesis polymerization of phenylacetylene (PA), is presented. Our results show that addition of a silver salt (AgBF 4 ) is necessary for the activation of the ditungsten complex. Polymerization of PA proceeds smoothly in tetrahydrofuran (THF) producing polyphenylacetylene (PPA) in high yields. On the other hand, the ROMP of NBE and its derivatives is more efficient in CH 2 Cl 2 , providing high yields of polymers. 13 C Cross Polarization Magic Angle Spinning (CPMAS) spectra of insoluble polynorbornadiene (PNBD) and polydicyclopentadiene (PDCPD) revealed the operation of two mechanisms (metathetic and radical) for cross-linking, with the metathesis pathway prevailing.

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Section: Polymerization Reactionsmentioning

confidence: 73%

Metathesis Polymerization Reactions Induced by the Bimetallic Complex (Ph4P)2[W2(μ-Br)3Br6]

et al. 2015

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“…Latent curing agents have been designed for one-pot curing systems with long shelf life [96,97]. They are made of two well-chosen components that cannot react under normal conditions.…”

Section: Page 11 Of 163mentioning

confidence: 99%

Control of reactions and network structures of epoxy thermosets

Vidil¹,

Tournilhac²,

Musso

et al. 2016

Progress in Polymer Science

293

252

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Recent advances in macromolecular chemistry have revolutionized the way we perceive the synthesis of polymers. Polymerization, to be modern, must be "controlled", which usually means capable of producing macromolecules of well-defined structure. The purpose of this review is to examine how the chemistry of epoxy resins, an almost century-old chemistry, is also involved in this movement. Epoxy resins are characterized by both the flexibility of implementation and the qualities of the polymers obtained. Key materials in health-, mobility-and energy related technologies, these resins are heavily present in high-performance composites, electronic boards, adhesives and coatings. Currently, a large number of resins and hardeners are available on the market or described in the literature and an interesting point is that almost any combination of the two is possible. Common to all these recipes and processes is that a liquid (or soluble) resin at some point becomes insoluble and solid. It is very important to know how to manage this transition, physically known as the gel point, as it is the point after which the shape of the object is irreversibly set. Taking into account the variety of epoxy polymerization processespolyaddition, anionic or cationic polymerization-we detail a number of methods to program the occurrence of the gel point and how this type of control affects the structure of the growing network.

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“…[23] Thus,t he photoinduced ring-opening metathesis polymerization (PROMP) [24] of an orbornene derivative (11)a nd cyclooctene (12)w as studied by using the UV irradiation sequences.S cheme 4s ummarizes the results obtained. [23] Thus,t he photoinduced ring-opening metathesis polymerization (PROMP) [24] of an orbornene derivative (11)a nd cyclooctene (12)w as studied by using the UV irradiation sequences.S cheme 4s ummarizes the results obtained.…”

Section: Angewandte Chemiementioning

confidence: 99%

A Light‐Activated Olefin Metathesis Catalyst Equipped with a Chromatic Orthogonal Self‐Destruct Function

et al. 2015

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As ulfur-chelated photolatent ruthenium olefin metathesis catalyst has been equipped with supersilyl protecting groups on the N-heterocyclic carbene ligand. The silyl groups function as an irreversible chromatic kill switch, thus decomposing the catalyst when it is irradiated with 254 nm UV light. Therefore,d ifferent types of olefin metathesis reactions may be started by irradiation with 350 nm UV light and prevented by irradiation with shorter wavelengths.T he possibility to induce and impede catalysis just by using light of different frequencies opens the pathway for stereolithographic applications and novel light-guided chemical sequences.

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Latent and Delayed Action Polymerization Systems

Cited by 83 publications

References 146 publications

Metathesis Polymerization Reactions Induced by the Bimetallic Complex (Ph4P)2[W2(μ-Br)3Br6]

Metathesis Polymerization Reactions Induced by the Bimetallic Complex (Ph4P)2[W2(μ-Br)3Br6]

Control of reactions and network structures of epoxy thermosets

A Light‐Activated Olefin Metathesis Catalyst Equipped with a Chromatic Orthogonal Self‐Destruct Function

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