Living carbocationic polymerization of resonance-stabilized monomers

Puskás, Judit E.; Kaszás, Gábor

doi:10.1016/s0079-6700(00)00010-1

Cited by 149 publications

(108 citation statements)

References 237 publications

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“…Moreover, when new portion of the monomer is added the reaction rate is not changed. It indicates the presence of the "live chains" in this system [51][52][53][54]. The behavior of this system is similar to the system VC -DEAC -chloroform studied earlier [46].…”

Section: Initiation Of Polymerization By Electron Transfersupporting

confidence: 62%

Cationic Polymerization of Vinyl Monomers Under the Action of Metalorganic Compounds

Lyapkov¹,

Ionova²,

Bondaletov³

et al. 2012

Polymerization

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Section: Initiation Of Polymerization By Electron Transfersupporting

confidence: 62%

Cationic Polymerization of Vinyl Monomers Under the Action of Metalorganic Compounds

Lyapkov¹,

Ionova²,

Bondaletov³

et al. 2012

Polymerization

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“…Norbornene polymerization has been investigated by others and the polymer T g can reach 320°C [3,4]. Lim presented a high chain termination capacity through the β-elimination reaction; accordingly, 10% Lim depressed the PInd M n from 33 Â 10 4 to less than 1 Â 10 4 g/mol ( Figure 5(c)), and poly(Ind-co-St) presented the lowest M n and M w /M n values [3]. Lim narrows the polymer polydispersity as well as reducing the Ind conversion compared to Ind-St copolymerization.…”

Section: Resultsmentioning

confidence: 99%

“…SnCl 4 , TiCl 4 , or BF 3 ) at À70°C to give high number average molecular weight (M n ) polymers [2]. Ind can also be polymerized in a living fashion, although a broad polymer molecular weight distribution (MWD) is obtained [3,4]. Over the last two decades, papers published on Ind polymerization with Friedel-Crafts catalysts at low temperatures have shown that the polymer average molecular weights depend on the type and amount of catalyst and the mechanism (i.e.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Brum

Laux

Forte

2012

Designed Monomers and Polymers

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Cationic homo-and co-polymerization of indene (Ind), styrene (St), limonene (Lim), and 5-ethylidene-2-norbornene (ENB) was performed with AlCl 3 in dichloroethane at À20°C under inert N 2 . The aim of this work is to investigate the effect of the reaction conditions on the molecular weight of polyindene (PInd) obtained by cationic polymerization with AlCl 3 without an electron donor, and also to determine the effect of the use of cyclic diolefin comonomers on the polymer properties. The polymers were synthesized at a monomer/catalyst molar ratio (MR) of 100; St and Lim showed the highest and lowest reactivity, respectively. The polymers were characterized by 13 C and 1 H NMR spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, size exclusion chromatography, differential scanning calorimetry, and thermogravimetric analysis. PInd with a number average molecular weight (M n ) of 45 Â 10 3 g/mol and a glass transition temperature (T g ) of 207°C was obtained, whereas only oligomeric polylimonenes were obtained. Cyclic diolefins depressed both the M n and T g values of the Ind-copolymers. There was a dramatic decrease in the M n of the polymers: those obtained at a MR of 1:1 in the feed presented M n values lower than 10 4 g/mol, with the exception of poly(Ind-co-ENB), which is cross-linked. Poly(Ind-co-Lim) with lateral double bonds, a comonomer content of 1 to 20 mol%, and T g values in the range of 140-200°C were obtained.

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“…Both the conventional and living carbocationic polymerization of IB have been thoroughly reviewed; some examples are given. [17][18][19][20] Living carbocationic polymerization gives unprecedented control over the polymerization process. This said, the control achieved in polymerizations currently termed "living" or "controlled," is a far cry from the precision controlled really living synthesis of proteins or other biological macromolecules.…”

Section: Development Of Pib-based Biomaterialsmentioning

confidence: 99%

Polyisobutylene‐based biomaterials

Puskás

Chen

Dahman

et al. 2004

J. Polym. Sci. A Polym. Chem.

123

121

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This article highlights the biomaterial-related research of the Macromolecular Engineering Research Centre (MERC). The MERC group concentrated on polyisobutylene (PIB)-based biomaterials. In this article, first the unique properties of PIB are discussed, followed by a review of PIB-based potential biomaterials. MERC's systematic research program aimed to develop novel PIB-based biomaterials is then highlighted, including surface modification and biocompatibility studies.

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Living carbocationic polymerization of resonance-stabilized monomers

Cited by 149 publications

References 237 publications

Cationic Polymerization of Vinyl Monomers Under the Action of Metalorganic Compounds

Cationic Polymerization of Vinyl Monomers Under the Action of Metalorganic Compounds

Synthesis of hydrocarbon polymers by cationic polymerization and their thermal properties

Polyisobutylene‐based biomaterials

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