✦ LIBER ✦

Influence of the kind of crown ether on the anionic polymerization of (phenoxymethyl)oxirane initiated by potassium tert-butoxide

✍ Scribed by Andrzej Stolarzewicz; Dorota Neugebauer; Zbigniew Grobelny

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 316 KB
Volume: 196
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.1995.021960429

No coin nor oath required. For personal study only.

✦ Synopsis

The propagation rate constant, k , , was determined for the polymerization of (phenoxy-methy1)oxirane (2,3-epoxypropyl phenyl ether) initiated by potassium tert-butoxide in the presence of various crown ethers: 12-crown-4,15-crown-5,18-crown-6, dicyclohexano-l8-crown-6, dicyclohexano-24-crown-8, dibenzo-18-crown-6 and dibenzo-24-crown-8. The equation correlating k, with complexation constants, K , , of the crown ethers was derived.

📜 SIMILAR VOLUMES

Influence of the crown ether concentrati

Influence of the crown ether concentration and the addition of tert-butyl alcohol on anionic polymerization of (butoxymethyl)oxirane initiated by potassium tert-butoxide

✍ Andrzej Stolarzewicz; Dorota Neugebauer; Zbigniew Grobelny 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 283 KB

The influence of the crown ether concentration on the reaction rate constants and the equilibrium constant in anionic (butoxymethy1)oxirane polymerization was studied. Polymerizations of (phenoxymethy1)oxirane and (2-(9-~arbazoyl)ethoxymethyl)oxirane were carried out for the sake of comparison. The

Influence of the kind of crown ether on

Influence of the kind of crown ether on the heterogeneous polymerization of propylene oxide in the presence of potassium hydride

✍ Andrzej Stolarzewicz; Dorota Neugebauer 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 271 KB 👁 2 views

The influence of 12-crown-4, 15-crown-5, 18-crown-6, dicyclohexano-18-crown-6 and dicyclohexano-24-crown-8 on the propylene oxide polymerization with potassium hydride was studied. The highest reaction rate was obtained in the presence of 18-crown-6 or dicyclohexano-18-crown-6. The use of dicyclohex

Influence of substituent on the polymeri

Influence of substituent on the polymerization of oxiranes by potassium hydride

✍ Andrzej Stolarzewicz; Dorota Neugebauer 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 42 KB 👁 2 views

The Influence of solvent and crown polye

The Influence of solvent and crown polyethers on the nucleophilic reactivity of potassium tert-Butylperoxide, potassium tert-Butoxide, and some other oxygen bases

✍ Ruggero Curci; Fulvio di Furia 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 455 KB

The rates of reaction of t-BuOOK, t-BuOK, n-BuOOK, and p-MeCaY,OK with pnitrophenyl diphenylphosphinate 1 and with p-nitrophenyl benzoate 2 have been measured in toluene both in the absence and in the presence of crown polyether dicyclohexyl-18crown-6 3a. The rates of nucleophilic displacement on 1

Effect of tetraalkylammonium salts on th

Effect of tetraalkylammonium salts on the tacticity of poly(methyl methacrylate), 2.. Initiation by potassium tert-butoxide

✍ Christo P. Novakov; Christo B. Tsvetanov 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 356 KB

## Effect of tetraalkylammonium salts on the tacticity of poly(methy1 methacrylate), 2 a) Initiation by potassium tert-butoxide Dedicated to Prof. Dr. B. L. Erussulimsky with best wishes on the occasion of his 80th birthday Christo I? Novakov, Christo B. 7betanov\*

Influence of the nature of cation and an

Influence of the nature of cation and anion on the polymerization of tetrahydrofuran initiated by substituted 1,3-dioxolan-2-ylium salts

✍ A. Wolińska; J. Łukaszczyk 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 288 KB 👁 2 views