Photopolymerization of cyclohexene oxide by phosphonium and arsonium salts

Abu-Abdoun, Ideisan I.; Aale-Ali,

doi:10.1016/0014-3057(93)90056-l

Cited by 13 publications

(8 citation statements)

References 11 publications

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“…Substituted triphenylamine (4 and 5) were obtained as reported early [11]. Monomers and solvents were purified according to standard procedures.…”

Section: Chemicals and Solventsmentioning

confidence: 99%

Synthesis and Applications of Polymeric Reagent p-Substituted Triphenylamine

Abu-Abdoun

2021

J. Res. Updates Polym. Sci.

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Chemical modification of chloromethylstyrene - styrene copolymer throughout reaction of p-substituted carboxylic acid group of bis-(4,4`-dibromo)-4``-triphenylamine carboxylic acid with the chloromethyl group attached to a phenyl group was carried out on soluble copolymer and polymeric cross-linked copolymer. Chemical oxidation of the neutral p-substituted triphenylamine with antimony pentachloride in dichloromethane solvent gives the corresponding cation - radical salt with the counter ion antimony hexachloride (SbCl6-). The isolated deep blue color cation radical salt is soluble or in insoluble (resin) form in the copolymer was used as a thermal cationic initiator for the polymerization of epoxy and vinyl monomers at room temperature. The cation radical resin showed good activity and stability compared to the soluble polymeric cation radical, both can initiate the cationic polymerization of cyclohexene oxide and N-vinylcarbazole in dichloromethane at room temperature.

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“…Substituted triphenylamine (4 and 5) were obtained as reported early [11]. Monomers and solvents were purified according to standard procedures.…”

Section: Chemicals and Solventsmentioning

confidence: 99%

Synthesis and Applications of Polymeric Reagent p-Substituted Triphenylamine

Abu-Abdoun

2021

J. Res. Updates Polym. Sci.

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“…Recently, we reported on the cationic polymerization of epoxide and vinyl monomers initiated by cation radical salts of phenothiazine derivatives (salt 1) [5], and N, N, N,N-tetraphenyl-p-phenelenediamine (salt 2) [6].…”

Section: Ar 2 I + X -----------------> Armentioning

confidence: 99%

“…After polymerization, the polymer was precipitated into methanol, filtered, dried, and weighed. Polymer yield percentage and rate of polymerization were determined gravimetrically [5,6]. The number averaged molecular weight (Mn) of the isolated polymer was measured in toluene on a Hewlett Packard (Model 501), and High-Speed Membrane Osmometer in toluene.…”

Section: Tetrahydrofuranmentioning

confidence: 99%

“…The effect of the counter ion effect shown in Table 2 could be due to the termination of the growing polymer chain by the counter ion, and salts having the PF 6 counterion is more reactive due to the greater stability of the counterion PF 6 as shown in equations (5)(6)(7)(8). Based on the stability of the counter ion and it is ability to fragment and give F ion the rate of polymerization in Table 2 varies from high to low, in the following sequence order:…”

Section: Polymerization Of N-vinylcarbazolementioning

confidence: 99%

“…Cationic polymerization is widely applicable for both vinyl and ring opening polymerizations giving place to many studies of both academic and industrial interests [1]. Thermally stable onium salts, such as diaryliodonium [2], triarylsulfonium [3], phosphonium and arsonium salts [4,5] in the presence of low nucleophilic complex metal halide anions are well established photo initiators for cationic polymerization.…”

Section: Introductionmentioning

confidence: 99%

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Cationic Polymerization Induced by Tris-(p-bromophenyl) Amine Cation-Radical Salts

Abu-Abdoun¹

2019

J. Res. Updates Polym. Sci.

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Substituted triphenylamine cation radical salts having anions of the type SbF6-, PF6-, BF4 and SbCl6-, were prepared and used to initiate cationic polymerization of cyclohexene oxide (CHO), tetrahydrofuran (THF), and N-vinyl carbazole (NVC), thermally in dichloromethane at room temperature. Experimental results are presented to show the effects of salt counter ion, concentration, and polymerization conditions on the yield and the molecular weight of the obtained polymer. THF polymerization was enhanced by photolysis of the reaction mixture for short time. A general mechanism for the polymerization by cation-radical salts of substituted triphenylamine is proposed.

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Polyethers, Propylene Oxide Polymers

Gagnon

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Propylene oxide and other epoxides under go homopolymerization to form polyethers. In industry the polymerization is started with multifunctional compounds to give a polyether structure having hydroxyl end groups. The hydroxyl end groups are utilized in a polyurethane forming reaction. This article is mainly concerned with propylene oxide and its various homopolymers that are used in the urethane industry. The polymerization of propylene oxide can be catalyzed by base (used commercially), acid (for glycol synthesis), and by coordination catalysts containing Al, Zn, or Fe as the central atom. The mechanism of base‐catalyzed polymerization is reviewed. The physical properties of poly(propylene oxide) as well as the physical methods for determining them are reviewed. Particular emphasis is placed on nmr which has yielded a wealth of information about the structure of poly(propylene oxide) and copolymers of propylene oxide and ethylene oxide.

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Photopolymerization of cyclohexene oxide by phosphonium and arsonium salts

Cited by 13 publications

References 11 publications

Synthesis and Applications of Polymeric Reagent p-Substituted Triphenylamine

Synthesis and Applications of Polymeric Reagent p-Substituted Triphenylamine

Cationic Polymerization Induced by Tris-(p-bromophenyl) Amine Cation-Radical Salts

Polyethers, Propylene Oxide Polymers

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