Synthesis of Microspheres of Poly (pyrrolyl methine) by Interfacial Polymerization

Yan, Wei; Wei, Zhouyin; Hsu, Chain‐Shu; Wan, Meixiang

doi:10.1016/s0379-6779(02)00617-3

Cited by 8 publications

(4 citation statements)

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“…In this method, the secondary overgrowth is restricted through migration of the hydrophilic PANI nanofibres to the aqueous phase and leaving the interface for the directional polymerization reaction. The ease of interfacial polymerization makes it the preferred technique in many fields ranging from microencapsulation of pharmaceutical products to the synthesis of conducting polymers [26,41]. From the perspective of electronic potential applications, polyaniline is a unique conjugated polymer, which can be tailored for specific applications through a non-redox acid/base doping process [40].…”

Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: A focus on the features of polyaniline nanofibres prepared via developing the single crystals of their block copolymers with poly(ethylene glycol)

et al. 2018

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Poly(ethylene glycol) (PEG)-polyaniline (PANI) diblock and triblock copolymers were synthesized via copolymerization of aniline with amine-terminated PEG by interfacial polymerization using sulphuric acid as dopant and ammonium peroxydisulfate (APS) as well as potassium hydrogen diiodate (PHD) as oxidants. The PHD-based synthesized PANI nanorods possessed longer lengths, narrower diameter distribution and higher conductivity. The electroactivity of synthesized copolymers was characterized using ultraviolet-visible (UV-Vis) spectrometry, cyclic voltammetry (CV) and resistivity measurement. Even in the presence of dielectric PEG blocks, the synthesized block copolymers had a conductivity around 3 S cm −1. In a further step, the solution-grown single crystals were prepared to investigate the general features of grafted PANI nanorods using small-angle X-ray scattering (SAXS), transmission electron microscopy (TEM) and atomic force microscopy (AFM). Based on AFM and SAXS analyses, the bimodal gel permeation chromatography (GPC) traces obtained from the block copolymers were originated from the diameter distribution of nanofibres, not from the dispersity of their lengths and molecular weights.

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Section: Introductionmentioning

confidence: 99%

RETRACTED ARTICLE: A focus on the features of polyaniline nanofibres prepared via developing the single crystals of their block copolymers with poly(ethylene glycol)

et al. 2018

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“…Figure 10 shows Figure 10). Compared with conventional methods such as interfacial polymerization [36], microwave-assisted copolymerization was more effective for the preparation of a higher yield, in shorter time (63% in 35 s). The higher yield under microwave irradiation suggested that microwave energy provides a more efficient synthetic route as a consequence of the direct interaction between microwaves and the molecular dipole moments of the reactants.…”

Section: Effect Of the [Benzaldehyde]/pyrrole Molar Ratio On Condensamentioning

confidence: 99%

Polycondensation of pyrrole and benzaldehyde catalyzed by Maghnite–H+

Belmokhtar¹,

Sahli²,

Yahiaoui³

et al. 2007

Express Polym. Lett.

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Abstract. Rapid synthesis of poly[(pyrrole-2,5-diyl)-co-(benzylidene)] was achieved under microwave irradiation via the condensation of pyrrole and benzaldehyde in 1,2-dichloroethane using acid exchanged montmorillonite clay called Maghnite-H + (Mag-H + ) as an efficient catalyst. The effect of the amount of catalyst and of time on the polymerization yield and on the viscosity of the polymers was studied. Compared with conventional static interfacial polymerization, the microwaveradiation polymerization reaction proceeded rapidly and was completed within 35 s. The conjugated polymer was characterized by means of 1 H-NMR, X-ray diffraction, FT-IR spectroscopy and AFM. The X-ray data showed the presence of a backbone form of the [(pyrrole-2,5-diyl)-co-(benzylidene)] formed.

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“…The secondary overgrowth is restricted as the hydrophilic nanofibers move toward the aqueous phase leaving the interface for directional polymerization reaction. The relative ease of interfacial polymerization made it the preferred technique in many fields ranging from microencapsulation of pharmaceutical products to the synthesis of conducting polymers 20, 21. Although there is a lot of literature on one‐dimensional PAni nanofibers including morphological study22 and structural characterization,23 studies focusing on the effects of solvent interaction with aniline on the structure and properties of PAni nanofibers synthesized using interfacial polymerization are scanty.…”

Section: Introductionmentioning

confidence: 99%

Effects of solvent interactions on the structure and properties of prepared PAni nanofibers

Pramanik

Karak

Banerjee

et al. 2012

J of Applied Polymer Sci

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The changes of structure and properties of nanofibers were studied as a function of solubility parameters of the organic solvents that are used in interfacial polymerization of polyaniline (PAni) nanofibers. The presence of UV-visible absorbance at 340, 440, and 800 nm confirmed the formation of emeraldine salt structure of the prepared PAni nanofibers. Fourier transform infrared spectral results indicate an increasing trend of benzenoid to quinoid ratio with the decrease of interaction of the solvents with aniline. This can be correlated to the increase in the degree of conjugation of the polymer chain. Photoluminescence study revealed an increase in the density of defect state with the decrease of interaction. Single-line approximation technique was used to analyze the broadening of the most intense X-ray reflection peak corresponding to (110) plane of the nanofibers. The greater the solvent-monomer interaction, the lesser was the domain length and p-stacking of the PAni chains. The study of this interaction is instrumental to precisely control the internal conformation of the PAni nanofibers. V C 2012 Wiley Periodicals, Inc. J Appl Polym Sci 126: [830][831][832][833][834][835][836] 2012

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Synthesis of Microspheres of Poly (pyrrolyl methine) by Interfacial Polymerization

Cited by 8 publications

References 0 publications

RETRACTED ARTICLE: A focus on the features of polyaniline nanofibres prepared via developing the single crystals of their block copolymers with poly(ethylene glycol)

RETRACTED ARTICLE: A focus on the features of polyaniline nanofibres prepared via developing the single crystals of their block copolymers with poly(ethylene glycol)

Polycondensation of pyrrole and benzaldehyde catalyzed by Maghnite–H+

Effects of solvent interactions on the structure and properties of prepared PAni nanofibers

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