Characteristics of Ionic Polymerization Processes

Erusalimskiĭ, B. L.

doi:10.1007/978-1-4684-8392-5_1

Cited by 2 publications

(4 citation statements)

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“…However, other ion-catalyzed neutral recombinations have been reported; e.g., C2H2+ and C3H+ catalyze the recombination of H atoms.40 Cfio+ may also catalyze the recombination of H.41 Ioncatalyzed polymerization of olefins is a well-known process in the liquid phase. 42 Reactions of CF3+ with Other Perfluorocarbons. CF¡+ + CjFg.…”

Section: Resultsmentioning

confidence: 99%

Reactions of CnFm+ ions with tetrafluoroethene and other perfluorocarbons

Morris¹,

Viggiano²,

Paulson³

1993

J. Phys. Chem.

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The gas-phase reactions of CF+, CF2+, CF3+, C2F3+, C2F4+, C3F5+, and C3F7+ with tetrafluoroethylene, c2F4, have been studied using a variable temperature-selected ion flow tube (VT-SIFT) instrument at 300 and 496 K. In addition, reactions of CF3+ with the perfluorocarbons C3F6, 2-C4Fg, and c-C4Fg have been studied at 300 and 496 K. Reaction rate constants and product branching fractions were measured. The reaction of CF+ with C2F4 is fast and produces the ions CF3+, C3F5+, and C2F4+. The ion CF2+ reacts with C2F4 by nondissociative charge transfer at the collisional rate. The reaction of CF3+ with C2F4 proceeds slowly by association, forming C3F7+ which reacts in a secondary reaction with C2F4 to regenerate CF3+. The neutral product of this secondary reaction is inferred to be C4F8; thus, dimerization of C2F4 is catalyzed by CF3+. For the reaction of C2F3+ with C2F4, which is fast, C3F5+ and a minor amount of C2F4+ are produced. The reaction of c2F4+ with c2F4 is slow, has a strong negative temperature dependence, and produces C3F5+ which is itself unreactive with C2F4. While CF3+ does not measurably react with c-C~FB, CF3+ does react rapidly by Ftransfer with both C3F6 and 2424Fg.

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Section: Resultsmentioning

confidence: 99%

Reactions of CnFm+ ions with tetrafluoroethene and other perfluorocarbons

Morris¹,

Viggiano²,

Paulson³

1993

J. Phys. Chem.

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“…There are numerous publications [1,5,6] dealing with the equilibrium of Eq. (3) between free ions as one extreme possibility for the structure of the initiating and/ Tab.…”

Section: Association Behavior/kineticsmentioning

confidence: 99%

“…There are several recent monographs [1][2][3][4][5][6][7] on anionic and cationic polymerization covering various mechanistic, kinetic and preparative aspects, so here just some fundamental issues which are relevant for reaction engineering will be discussed.…”

Section: Introductionmentioning

confidence: 99%