The origin of the initiating activity of (C2H5)3O+PF for the polymerization of N‐vinylcarbazole

Turchi, G.; Matera, F.; Magagnini, Pier Luigi

doi:10.1002/macp.1973.021700106

Cited by 10 publications

(2 citation statements)

References 8 publications

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“…is an important polymer owing to its electrophotographic applications [ 1 ]. The polymerization of N-vinylcarbazole (NVC) has been carried out by different types of catalytic agents such as free radicals [2][3][4], cations [5][6][7][8][9], Ziegler-Natta catalysts [10,11], and transition metal chlorides such as WC16 and MoCl5 [12]. It has been reported that the stereoregularity of poly(NVC) depends on the polymerization catalyst and conditions [13].…”

Section: Introduction Poly(n-vinylcarbazole)mentioning

confidence: 99%

Polymerization of N-vinylcarbazole by rhenium carbonyl compounds

Abu-Abdoun

Al-Alawi

Sikander

1998

Designed Monomers and Polymers

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The polymerization of N-vinylcarbazole by rhenium carbonyl compounds such as Re2(CO)10 and Re(CO)5X (X = Br, Cl, I) has been carried out photochemically at 355 nm (bulk) and thermally at 25 and 70°C in dichloromethane. The effects of the catalyst structure, the concentrations, the solvent's polarity, and the ligand's structure were examined. Polymerization proceeds very rapidly at low monomer and catalyst concentrations. The molecular weight of the resulting polymer was determined by viscosity.

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Section: Introduction Poly(n-vinylcarbazole)mentioning

confidence: 99%

Polymerization of N-vinylcarbazole by rhenium carbonyl compounds

Abu-Abdoun

Al-Alawi

Sikander

1998

Designed Monomers and Polymers

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“…Turchi et a1. 12 reported that polymerization of NVCa in the presence of triethyloxonium hexafluorophosphate yielded polymers with molecular weights greater than lo6. They proposed phosphorous pentafluoride instead of the commonly known oxonium ion as the possible active initiator responsible for rapid polymerization of NVCa.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and polymerization of N‐vinylarylamines

Lin

1979

J. Polym. Sci. Polym. Chem. Ed.

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Several N-vinylarylamines have been prepared by direct N-vinylation of arylamine salts with acetylene a t atmospheric pressure. Nuclear magnetic resonance (NMR) spectra of the various N-vinylarylamines were recorded and chemical shift assignments were made for the first time. The vinyl protons of the enamines generally exhibit an ABX pattern. The electron-rich monomers are sensitive to acid-catalyzed hydrolysis in a wet solvent. Polymerizations of the monomers were carried out a t low temperatures with phosphorous pentafluoride as an initiator. It was found that PF5 generated directly from thermal decomposition of p-chlorobenzenediazonium hexafluorophosphate is useful in the preparation of an extremely high-molecular-weight poly(N-vinylcarbazole) (zu, = 3 X lo6) with a narrow molecular weight distribution (MWD = 2.1). The polymerizability of Nvinylarylamines appears to vary with the amine functional groups of the monomers. N-vinylarylamine containing a planar amine moiety such as carbazole forms a higher-molecular-weight polymer than the monomers with the nonplanar bulky amine groups.

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Zur stabilität der komplexen anionen bei der kationischen polymerisation

1979

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The counterions appearing in the mechanism of the cationic polymerization are able to decay according toand so give rise to termination reactions. For the model systems (C,H,),C"MtXf + , (Mt = B, Al, Sn, P, As, Sb,In, Ti, Fe; X = F, C1, Br) the decay has been investigated by spectroscopic and conductometric methods. The overall decay rate constant k, is hardly influenced by traces of water (cH2,, < mol. 1-I ) and by structure variations of the cation. On the other hand, k, increases by decreasing the concentration of the salt. When the structure is vaned k, increases with decreasing donor strength of the ligands X, the sensitivity of the anion to changes in the ligand sphere increases corresponding to the ionization potential of the central atom Mt. Addition of tetracyanoethylene raises the stability of the anions. The results can be. explained by the HSAB principle and fit well in a scheme of stabilization of anions by acceptors.

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The origin of the initiating activity of (C₂H₅)₃O⁺PF for the polymerization of N‐vinylcarbazole

Cited by 10 publications

References 8 publications

Polymerization of N-vinylcarbazole by rhenium carbonyl compounds

Polymerization of N-vinylcarbazole by rhenium carbonyl compounds

Synthesis, characterization, and polymerization of N‐vinylarylamines

Zur stabilität der komplexen anionen bei der kationischen polymerisation

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