Polymerization of styrene oxide initiated by iodine and preparation of styrene oxide‐2‐methyl‐2‐oxazoline block copolymer

Seung, S. L. N.; Young, R. N.

doi:10.1002/pol.1980.130180203

Cited by 21 publications

(6 citation statements)

References 10 publications

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“…The characteristics of the samples (before irradiation) examined are presented in Figure 1. They all show strong characteristics absorption bands of benzene ring (1607, 1587, 1493 cm −1 ), CO group (1150 cm −1 ), and of CH in benzene (700 cm −1 ), which are similar to PSO obtained with other catalysts 10. All the polymers were prepared cationically using Mag‐H + as catalyst.…”

Section: Resultssupporting

confidence: 64%

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst

Hachemaoui

Yahiaoui

Belbachir

2008

J of Applied Polymer Sci

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The nature of irregularities and end‐groups in poly(styrene oxide) samples prepared using Maghnite‐H+ as a cationic catalyst were studied by 1H‐ and 13C‐NMR at 200 MHz. Head‐to‐head (H‐H) and tail‐to‐tail (T‐T) irregularities are detected in all the samples studied. Secondary hydroxyl terminal groups are identified in polymers prepared with Maghnite‐H+. Poly(styrene oxide) was found to undergo chain scission by aging at 25°C. It was confirmed that oxidation of this type of polymers results from the important sensitivity of the polyether soft segment to oxidative degradation. For this reason, the scissions due to the oxidation of the material lead to notable quantities of low molecular weight photoproducts. Among the various structures produced by the oxidative degradation process, benzoate and secondary hydroxyl groups are identified by MALDI‐TOF‐MS. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008

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Section: Resultssupporting

confidence: 64%

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst

Hachemaoui

Yahiaoui

Belbachir

2008

J of Applied Polymer Sci

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“…GC analysis of the solutions recovered after the reaction detected minor amounts of 2-phenylethanol as a byproduct. IR analysis of the solution (Figure S2, Supporting Information) showed a band at ∼1110 cm –1 assigned to C–O stretching of the ether linkage, suggesting that polymerized styrene oxide is also involved as a byproduct, as observed in related catalytic systems . As shown in Table (sample 10 ), the dark reaction scarcely promotes deoxygenation.…”

Section: Resultsmentioning

confidence: 89%

Noble-Metal-Free Deoxygenation of Epoxides: Titanium Dioxide as a Photocatalytically Regenerable Electron-Transfer Catalyst

et al. 2014

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Catalytic deoxygenation of epoxides into the corresponding alkenes is a very important reaction in organic synthesis. Early reported systems, however, require noble metals, high reaction temperatures (>373 K), or toxic reducing agents. Here, we report a noble-metal-free heterogeneous catalytic system driven with alcohol as a reducing agent at room temperature. Photoirradiation (λ <420 nm) of semiconductor titanium dioxide (TiO 2 ) with alcohol promotes efficient and selective deoxygenation of epoxides into alkenes. This noble-metal-free catalytic deoxygenation is facilitated by the combination of electron transfer from surface Ti 3+ atoms on TiO 2 to epoxides, which promotes deoxygenation of epoxides, and photocatalytic action of TiO 2 , which regenerates oxidized surface Ti atoms with alcohol as a reducing agent.

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“…In 1980, Seung and Young [61] reported the preparation of styrene oxide-2-methyl-2-oxazoline block copolymer. Polystyrene oxide was first made by polymerizing the styrene oxide monomer with I 2 , and the polymer obtained gained 3% of iodine in form of alkyl iodide as end groups.…”

Section: S Moulaymentioning

confidence: 99%

Molecular iodine in monomer and polymer designing

Moulay

2013

Designed Monomers and Polymers

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Not only does the molecular iodine play a leading role in organic synthesis but also in the polymer synthesis. Different kinds of polymerization initiated by molecular iodine are herein screened: cationic polymerization, radical polymerization, living/controlled radical polymerization (LCRP) such as reverse iodine transfer polymerization, polycondensation, and ring-opening polymerization (ROP). Also, the functionalization of polymers using molecular iodine, such as the acetylation of polysaccharides (cellulose, starch), and the use of iodine-polymer complex in organic synthesis are also discussed. Numerous natural and synthetic polymers are prone to make complexes with molecular iodine, and one feature of such complexes is their propensity as polymer-supported reagent and catalysts in many organic syntheses.

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Polymerization of styrene oxide initiated by iodine and preparation of styrene oxide‐2‐methyl‐2‐oxazoline block copolymer

Cited by 21 publications

References 10 publications

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst

Noble-Metal-Free Deoxygenation of Epoxides: Titanium Dioxide as a Photocatalytically Regenerable Electron-Transfer Catalyst

Molecular iodine in monomer and polymer designing

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Polymerization of styrene oxide initiated by iodine and preparation of styrene oxide‐2‐methyl‐2‐oxazoline block copolymer

Cited by 21 publications

References 10 publications

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H+ as cationic catalyst

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H+ as cationic catalyst

Noble-Metal-Free Deoxygenation of Epoxides: Titanium Dioxide as a Photocatalytically Regenerable Electron-Transfer Catalyst

Molecular iodine in monomer and polymer designing

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Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst

Structural and photooxidation studies of poly(styrene oxide) prepared with Maghnite‐H⁺ as cationic catalyst