Styrene‐divinylbenzene copolymers, 3. Revisited IR analysis

Bartholin, M.; Boissier, Giselle; Dubois, Joëlle

doi:10.1002/macp.1981.021820719

Cited by 81 publications

(43 citation statements)

References 9 publications

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“…The major peaks in the IR spectrum of the copolymer tallies almost with those reported by Bartholin et a/. 19 though the resolution of our spectrum is somewhat poorer. The major peaks are at 1630cm-1 (C=C stretching vibration); 1510cm-1 (para disubstituted phenyl ring, ve-e); 1440cm-1 (both mono and disubstituted phenyl rings, Ve-e); 1030cm-1 (mono substituted phenyl ring, Pe-H); 900cm-1 (disubstituted ring, Ye-H); 800cm (metadisubstituted aromatic ring, Ye-H).…”

Section: Resultssupporting

confidence: 73%

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Electroinitiated Copolymerization of Styrene and Commercial Divinylbenzene in a Mixed Biphasic System

Mahata

Nayak

1987

Polym J

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ABSTRACT:The electroinitiated copolymerization of styrene and commercial divinylbenzene has been carried out in an intimately mixed two phase system made of a polar phase consisting of a highly polar solvent, i.e., formamide together with ferric chloride as the added electrolyte, and a non-polar phase formed by the mixture of the two monomers themselves or fheir solutions in a non-polar solvent like benzene or toluene. The copolymer formed was found to be partially crosslinked and its formation depended on several factors such as the intensity of stirring, concentrations of the electrolyte and the comonomers, strength of the current flow, time of electrolysis and temperature. In split cell experiments, the copolymer is found to be formed in the cathode compartment. A radical mechanism has been proposed to explain the copolymerization reaction.

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Section: Resultssupporting

confidence: 73%

“…It is not clear how the reduction of the cation (III) takes place in the vicinity of the cathode, whether the direct transfer of an electron to the cation occurs from the cathode or indirectly the latter is reduced by Fe 2 + Polymer J., Vol. 19, No. 10,1987 produced electrochemically by the cathodic reaction is not known with certainty.…”

mentioning

confidence: 99%

Electroinitiated Copolymerization of Styrene and Commercial Divinylbenzene in a Mixed Biphasic System

Mahata

Nayak

1987

Polym J

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“…The peak heights multiplied by their various extinction coefficients give A, B, C, and D. 33 The vinyl peaks are at 1630 cm Ϫ1 (A) and 990 cm Ϫ1 (B), and the para-disubstitued phenyl ring is at 1510 cm Ϫ1 (C) and meta-disubstituted phenyl ring is at 795 cm Ϫ1 (D). C and D account for all of the repeat units in the polymer.…”

Section: Ftirmentioning

confidence: 99%

“…The peak assignments are given in Table IX. Bartholin et al 33 have developed a method for a quantitative determination of vinyl group content in co-(polystyrene-DVB) beads by infrared analysis. Since the particles in this study are homopolymers of either meta-DVB or para-DVB, a modified method reported by Hubbard et al 34 has been applied.…”

Section: Ftirmentioning

confidence: 99%

Characterization of crosslinked, macroporous, monosized polymer particles

Nyhus¹,

Hagen²,

Berge³

2000

J. Appl. Polym. Sci.

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Macroporous, monosized poly(meta-divinylbenzene) and poly(para-divinylbenzene) beads have been prepared by the two-step activated swelling method with toluene or 2-ethylhexanoic acid as pore-forming agents. The type of divinylbenzene isomer as well as the type of porogen has a large effect on both physical and chemical properties of the monodisperse beads. Large pores are obtained with 2-ethylhexanoic acid as porogen while beads prepared in the presence of toluene consist of only small pores and exhibit a shrinking behavior upon drying. The beads have considerable amounts of residual vinyl groups at the end of polymerization, as determined by bromination and Fourier transform IR analysis. The morphology and texture of the particles have been investigated by scanning electron microscopy and atomic force microscopy.

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“…É possível que a pouca quantidade de DVB, nesta síntese, não tenha favorecido a suspensão por completo. Como o DVB utilizado é de grau comercial (com aproximadamente 55% DVB), o teor de DVB expresso acima (3%) não reflete a quantidade efetiva de agente reticulante, podendo não levar a formação de ligações cruzadas, e ficar na forma de grupos vinilas pendentes não-polimerizáveis [16] . Outra explicação poderia ser o aumento da polaridade do meio com a diminuição do teor de DVB.…”

Section: Caracterizaçãounclassified

Microesferas magnéticas à base de poli(metacrilato de metila-co-divinilbenzeno) obtidas por polimerização em suspensão

et al. 2015

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ResumoMicroesferas poliméricas à base de metacrilato de metila (MMA), divinilbenzeno (DVB) e material magnético foram preparadas via polimerização por suspensão. Foi estudada a influência da polimerização em suspensão ou semisuspensão, concentração de material magnético e concentração de divinilbenzeno sobre as características das microesferas obtidas. As partículas poliméricas foram caracterizadas por espectroscopia vibracional na região do infravermelho por transformada de Fourier (FT-IR), microscopia eletrônica de varredura, analisador de área específica e porosimetria, espalhamento de luz e magnetometria de amostra vibrante. O material magnético também foi caracterizado por FT-IR, além de difratometria de raios X e espectroscopia Mössbauer. Foram obtidas, com sucesso, microesferas poliméricas magnéticas à base de MMA e DVB (P(MMA-co-DVB)-M), contendo partículas magnéticas tanto na superfície quanto no interior da microesfera. As partículas obtidas através de polimerização em semisuspensão apresentaram tamanhos menores e distribuição de tamanhos de partículas mais estreita que as partículas obtidas através de suspensões convencionais. Os compósitos apresentaram um comportamento superparamagnético. As microesferas magnéticas sintetizadas neste trabalho têm potencial para serem modificadas e aplicadas como resinas de troca iônica ou suportes catalíticos. Palavras-chave: polimerização em suspensão, propriedades magnéticas, metacrilato de metila, divinilbenzeno, material magnético. AbstractMagnetic polymeric microspheres based on methyl methacrylate (MMA), divinylbenzene (DVB) and magnetic materials were prepared via suspension polymerization. We studied the influence of the suspension or semi-suspension polymerization, magnetic materials and divinylbenzene concentration on the characteristics of the microspheres. Polymeric particles were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy, accelerated surface area and porosimetry analyzer (ASAP), dynamic light scattering (DLS) and vibrating sample magnetometer (VSM). The magnetic materials were also characterized by FT-IR, X-ray diffraction and Mössbauer spectroscopy. Magnetic polymeric microspheres based on MMA and DVB (P(MMA-co-DVB)-M), containing magnetic particles on the surface or inside the microspheres, were successfully obtained. The polymer particles obtained through semi-suspension polymerization had smaller sizes and narrower particle size distribution than particles obtained by conventional suspension. The composites showed a superparamagnetic behavior. The magnetic microspheres synthesized in this work have potential to be modified and applied as ion-exchange resins or catalyst supports.

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Styrene‐divinylbenzene copolymers, 3. Revisited IR analysis

Cited by 81 publications

References 9 publications

Electroinitiated Copolymerization of Styrene and Commercial Divinylbenzene in a Mixed Biphasic System

Electroinitiated Copolymerization of Styrene and Commercial Divinylbenzene in a Mixed Biphasic System

Characterization of crosslinked, macroporous, monosized polymer particles

Microesferas magnéticas à base de poli(metacrilato de metila-co-divinilbenzeno) obtidas por polimerização em suspensão

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