ChemInform Abstract: Synthesis of Azobis(formamidoacetic acid) and Some of Its Derivatives.

Simionescu, C. I.; Comăniţá, Eugenia; Pastravanu, M.; Comanita, Bogdan

doi:10.1002/chin.199048093

Cited by 6 publications

(7 citation statements)

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“…In addition, FRP is one of the most important processes for industrial polymer production. Because with a wider monomer class, polymerization can be performed more easily under moderate experimental conditions [21–24] . Hydrogen‐transfer polymerization (HTP) is a useful route that can insert functional groups into the backbone of a macromolecule.…”

Section: Introductionmentioning

confidence: 99%

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

et al. 2022

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3‐hydroxypropionate moieties grafted polystyrene [poly(S‐g‐3HP)] was prepared by sequentially applying the hydrogen‐transfer polymerization (HTP) and the free‐radical polymerization (FRP) via “grafting through” strategy. For this purpose, oligomeric poly(3‐hydroxypropionate) with vinyl end‐group (P3HP) was prepared via HTP of acrylic acid in the presence of tNaBuO as an alkaline catalyst. Then, the oligomeric P3HP was used as a comonomer in the FRP of styrene yielding the poly(S‐g‐3HP) copolymer, namely chemically modified polystyrene. 1H‐NMR, FTIR, DSC, TGA, GPC, and MALDI MS techniques were applied to confirm the structures of both the oligomer and modified polystyrene. Glass transition temperatures of the modified polystyrene samples were found to be decreased from 103 to 84 °C depending upon the amount of 3‐hydroxypropionate (3HP) moieties. Solution‐cast films were prepared by the polystyrene homopolymer and modified polystyrenes. The contact angle values were determined to decrease gradually from 87.5 to 53.7° with increasing the amount of the 3HP moiety grafted polystyrene.

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Section: Introductionmentioning

confidence: 99%

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

et al. 2022

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“…In addition, free‐radical polymerization is one of the most important processes for industrial polymer production. Because with a wider monomer class, polymerization can be performed more easily under moderate experimental conditions [27–30] . Copolymers have substantial interest due to their mechanical properties and practical applications [31–37] .…”

Section: Introductionmentioning

confidence: 99%

Modification of Poly(Styrene‐co‐Acrylonitrile) with Tetrazine by Inverse Electron Demand Diels‐Alder Reaction

Meyvacı

Öztürk

2022

ChemistrySelect

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Poly(styrene‐co‐acrylonitrile) [P(SAN)] copolymer was obtained by using styrene and acrylonitrile monomers via free‐radical polymerization. The tetrazine groups were formed in the P(SAN) copolymer backbone by using 2‐fluorobenzyl cyanide, hydrazine hydrate, zinc iodide as the catalyst, and sodium nitrile. The tetrazine groups in the copolymer backbone were modified using trans‐cyclooctenol by the Inverse Electron Demand Diels‐Alder reaction. The spectroscopic properties of the obtained products were determined by Fourier transform infrared and proton nuclear magnetic resonance and their thermal properties were determined by thermogravimetric analysis and differential scanning calorimetry techniques. The average molecular weights of the synthesized polymers were defined by using gel permeation chromatography method.

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“…Unlike simple low molecular weight peroxides, their polymeric counterparts, although long known, have not been studied extensively with respect to their initiating characteristics 14, 15. Among polymeric peroxides, vinyl polyperoxides15 play a primary role because they are obtained via radical, alternating copolymerization reactions of vinyl monomers and oxygen.…”

Section: Introductionmentioning

confidence: 99%

Thermal-initiating potentialities of poly(methyl methacrylate) peroxide: Metamorphosis of block-into-block copolymer and comparative studies on surface texture and morphology

Nanda

Kishore

2001

J. Polym. Sci. A Polym. Chem.

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This is the first report concerning the use of vinyl polyperoxide, namely, poly(methyl methacrylate) peroxide (PMMAP), as a thermal initiator for the synthesis of active polymer PMMAP‐PS‐PMMAP by free‐radical polymerization with styrene. The polymerizations have been carried out at different concentrations of macroinitiator PMMAP. The active polymers have been characterized by 1H NMR, DSC, thermogravimetric analysis, and gel permeation chromatography. PMMAP‐PS‐PMMAP is further used as the thermal macroinitiator for the preparation of another block copolymer, PMMA‐b‐PS‐b‐PMMA, by reacting the active polymers with methyl methacrylate. The block copolymers have been synthesized by varying the concentrations of the active polymers. The mechanism of block copolymers has been discussed, which is also supported by thermochemical calculations. Studies on the surface texture and morphology of the block copolymer of polystyrene (PS) and PMMA material have been carried out using scanning electron microscopy. Furthermore, in this article, a blend of the same constituent materials (PS and PMMA) in proportions (v/v) similar to that contained in block copolymers has been formulated, and the morphology and surface textures of these materials were also investigated. A comparative microscopical evaluation between two processing methods was done for a better understanding of the processing route dependence of the microstructures. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 546–554, 2001

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ChemInform Abstract: Synthesis of Azobis(formamidoacetic acid) and Some of Its Derivatives.

Abstract: 093ChemInform Abstract Due to the insolubility of the title compound (III) in suitable solvents, its conversion to the corresponding acid chloride is only possible with PCl5/AcCl (see scheme). Reaction of this chloride with conc. ammonia gives the amide (V).

Cited by 6 publications

References 0 publications

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

Introduction of 3‐Hydroxypropionate Moieties to Polystyrene by “Graft Through” Strategy

Modification of Poly(Styrene‐co‐Acrylonitrile) with Tetrazine by Inverse Electron Demand Diels‐Alder Reaction

Thermal-initiating potentialities of poly(methyl methacrylate) peroxide: Metamorphosis of block-into-block copolymer and comparative studies on surface texture and morphology

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