Vinylpyridinium ionomers. 1. Influence of the structure of the ion on the state of aggregation in random styrene-based systems

Gauthier, Sylvie; Duchesne, Denis; Eisenberg, Adi

doi:10.1021/ma00170a009

Cited by 71 publications

(61 citation statements)

References 7 publications

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“…This result was consistent with the results of DSC and TG for the membranes. This result (phase separation) was not consistent with other literature, 18 the reason being that the ratio of ionic groups was different in that work. 18 This implies that the copolymers D and C had good electrochemical properties.…”

Section: Morphological Characteristics Of the Membranescontrasting

confidence: 98%

Synthesis and characterization of quaternized poly(4‐vinylpyridine‐co‐styrene) membranes

Huang

Xiao

Zhuang

2005

J of Applied Polymer Sci

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Copolymers of 4-vinylpyridine and styrene [P(4VP-St)s] with varied molar ratios were synthesized by means of radical mass polymerization with 2,2Ј-azobisisobutyronitrile as an initiator. The insoluble (linear) pyridinium-type polymers in the octyl-pyridinium bromide form, which possess various macromolecular chain compositions, were prepared by the reaction of each P(4VP-St) with 1-bromooctane. A series of membranes were prepared for use in electrochemistry. These membranes, prepared with quaternized poly(styrene-co-4-vinylpyridine), were characterized by IRspectroscopy, Xray diffraction, differential scanning calorimetry, thermogravimetory, tensile strength measurements, scanning electron microscopy, and an electrochemistry workstation. Our emphasis was to select a membrane with appropriate properties for use in the electrochemistry field. A promising membrane was selected to use in the field of electrochemistry by these characterizations. This study could be the preparation for a study on the electrochemical properties of pyridinium-type polymers.

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Section: Morphological Characteristics Of the Membranescontrasting

confidence: 98%

Synthesis and characterization of quaternized poly(4‐vinylpyridine‐co‐styrene) membranes

Huang

Xiao

Zhuang

2005

J of Applied Polymer Sci

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“…[1][2][3][4] Pyridine-containing polymers have exhibited interesting properties due to their ability to quaternise the tertiary nitrogen to prepare ionic polymers. [5][6][7][8] Polyurethane ionomers are prepared either by the introduction of potential ionic moieties at the chain extension stage or by the post-performed polymer. Reports on the introduction of pyridinium groups as chain extenders are rare.…”

Section: Introductionmentioning

confidence: 99%

Comparative studies on short-chain and long-chain crosslinking in polyurethane networks

Sriram

Mahesh

Jeevan

et al. 2000

Macromol. Chem. Phys.

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Isocyanate terminated prepolymers were synthesised using poly(tetramethylene oxide) glycol of molecular weight 1 000 (PTMG1000) and poly(propylene oxide) glycol of molecular weight 1 000 (PPG1000) with tolylene‐2,4‐diisocyanate (TDI). The prepolymers were chain extended with N,N‐bis(2‐hydroxyethyl)isonicotinamide to form polyurethanes containing pyridine moieties. These polyurethanes were converted to cationomers by crosslinking with (a) 1,4‐dibromobutane to form short‐chain crosslinked polymers (SCCPs) and (b) bromine‐terminated prepolymers to form long‐chain crosslinked polymers (LCCPs). The cationomers were characterised by Fourier transform infrared spectroscopy, thermal and mechanical analysis. FTIR spectral results of SCCPs and LCCPs confirmed the quaternisation of heterocyclic nitrogen leading to crosslinking. Dynamic mechanical analysis showed better damping properties for LCCPs than SCCPs. The stress‐strain measurements showed higher elongation and lower tensile strength for LCCPs.

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“…The disappearance of pyridine band at 1414 cm -1 in the IR spectrum was taken as evidence for quantitative alkylation of vinylpyridine units. According to a report of Eisenberg et al [25], the IR technique, in contrast to elemental and iodine analyses, represents a sensitive and reliable method for evaluation of the extent of quaternization.…”

Section: Quaternization Of 4vp Polymersmentioning

confidence: 99%

“…Usually, quaternization of vinylpyridine polymers was carried out by refluxing in a polar solvent, such as tetrahydrofuran or methanol, with excess alkylating agent [19,25]. We have found, however, that the synthesized copolymers A and B as well as 4VP homopolymer react with a five-fold stoichiometric excess of CH 3 I in DMF (~ 10 % solution) at ambient temperature in a markedly shorter time yielding a completely modified product (Tab.…”

Section: Quaternization Of 4vp Polymersmentioning

confidence: 99%

Synthesis and quaternization of nitroxide-terminated poly(4-vinylpyridine-co-acrylonitrile) macroinitiators and related diblock copolymers

et al. 2010

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Nitroxide-terminated 4VP AN copolymers have been synthesized at 125 o C using an alkoxyamine (MAMA-SG1) as a unimolecular initiator. Their compositions were compared with those published for the conventional radical 4VP-AN copolymerization. To verify the initiation potential of the copolymers containing nitroxyl end groups, they were employed in chain extension with styrene (S). Both the prepared statistic copolymer macroinitiators and related diblock copolymers, poly(4VP-co-AN) and poly(4VP-co-AN)-block-poly(S), respectively, were quaternized with methyl iodide in N,N-dimethylformamide or methanol at ambient temperature. The size-exclusion chromatography and NMR were used for the characterization of the polymers; the completeness of the quaternization was checked by the IR spectrometry.

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Vinylpyridinium ionomers. 1. Influence of the structure of the ion on the state of aggregation in random styrene-based systems

Cited by 71 publications

References 7 publications

Synthesis and characterization of quaternized poly(4‐vinylpyridine‐co‐styrene) membranes

Synthesis and characterization of quaternized poly(4‐vinylpyridine‐co‐styrene) membranes

Comparative studies on short-chain and long-chain crosslinking in polyurethane networks

Synthesis and quaternization of nitroxide-terminated poly(4-vinylpyridine-co-acrylonitrile) macroinitiators and related diblock copolymers

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