On the nature of “functional groups” in non-functionalized hypercrosslinked polystyrenes

Tsyurupa, M. P.; Blinnikova, Z. K.; Davidovich, Yu. A.; Lyubimov, S. E.; Naumkin, A. V.; Davankov, V. A.

doi:10.1016/j.reactfunctpolym.2011.03.002

Cited by 51 publications

(26 citation statements)

References 21 publications

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“…This works also suggests the existence of peaks that occur in the carbonyl region of the IR spectra are not due to the presence of carbonyl groups, but are likely the CvC stretching from substituted aromatic rings, which grow in intensity as a higher degree of substituted aromatic rings are formed with increasing amounts of FDA. These findings support recent work upon the assignment of these peaks in HCP networks, 62,63 and explains why the position of these peaks are dependent upon the monomer used to form the HCP. The small amount of mass lost from the polymers and the minimal levels of iron residues in the polymers as measured by TGA and XPS, respectively, indicate the discrepancies in the microanalysis data and greater than 100% yields are more a consequence of non-ideal network formation rather than the presence of contaminants in the polymer.…”

Section: Discussionsupporting

confidence: 89%

Swellable functional hypercrosslinked polymer networks for the uptake of chemical warfare agents

et al. 2017

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The need for porous materials to function as sorbents in order to allow for bulk uptake (and potential deactivation) of chemical warfare agent (CWA) stockpiles is of significant importance in the world today.Hypercrosslinked polymers (HCPs) represent a class of such sorbents being produced using the facile and tuneable so-called "knitting" procedure. Several HCPs are reported and their properties including apparent Brunauer-Emmett-Teller surface areas (SA BET ) and swellability (Q) against CWA simulants are examined using two reliable swelling methods which we have developed. The HCP derived from fluorobenzene showed the greatest potential for using such materials for CWA uptake and was tested against real agents including isopropyl methylphosphonofluoridate (sarin, GB) and bis(2-chloroethyl)sulfane (sulfur mustard, HD) revealing uptakes close to 20 mL g −1.

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Section: Discussionsupporting

confidence: 89%

Swellable functional hypercrosslinked polymer networks for the uptake of chemical warfare agents

et al. 2017

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“…In our case, we used DCE as a swelling medium for the HCL reaction, and therefore the presence of large amounts of carboxyl groups was unexpected. A detailed explanation of the presence of absorption bands in the range 1600-1740 cm À1 for HCL Davankov-type resins was reported by Tsyrupa et al, 57 that denied the presence of C]O functionalities in the HCL polystyrenes, attributing these bands to hindered vibrations of carbon-carbon bonds and valence angles in aromatic rings. In our case, the hypothesis denying the dependence of these bands on C]O groups is conrmed by EDX results on the HCL systems that have evidenced comparable oxygen contents, 3.72 AE 0.13 mol% and 3.55 AE 0.23 mol%, for X_DVB-VBC and for X_DVB-ST-VBC, respectively, with no signicant differences recorded for the corresponding nanocomposites.…”

Section: Hcl Resins and Nanocomposites Characterizationmentioning

confidence: 87%

Synthesis and adsorption study of hyper-crosslinked styrene-based nanocomposites containing multi-walled carbon nanotubes

et al. 2017

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New nanocomposite microporous materials obtained by adding functionalized multi-walled carbon\ud nanotubes (MWCNT) to styrene/vinylbenzyl chloride/divinylbenzene hyper-crosslinked resins were\ud prepared and characterized. In order to promote the embedding of the MWCNT within the gel-type\ud precursor, a suitable surface modi\ud fi\ud cation strategy was set up, based on the grafting of a poly(vinylbenzyl\ud chloride) (PVBC) resin, able to participate in the hyper-crosslinking step, onto the nanotube surface.\ud Characterization of the nanocomposites by FTIR spectroscopy and electron microscopy enabled the\ud assessment of the e\ud ff\ud ect of the nanotubes on the structure and the morphology of the resin. Moreover,\ud gas sorption measurements indicated that by addition of nanotubes it is possible to modulate the pore\ud size distribution, the uptake of CO\ud 2\ud and H\ud 2\ud and the CO\ud 2\ud /N\ud 2\ud selectivity. Finally, modi\ud fi\ud ed MWCNT are also\ud able to improve the adsorption capacity of phenol from water solutions, suggesting the possible\ud application of the new microporous nanocomposites for water remediati

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“…After accomplishing the reaction, the beads of the product were filtered and washed with dry acetone, 0.5 M pure HCl and excess distilled water that was additionally purified by passing through a column with hypercross‐linked Macronet MN‐200. The beads were dried in an oven at 80°C .…”

Section: Methodsmentioning

confidence: 99%

Physicochemical and adsorption properties of hypercross‐linked polystyrene with ultimate cross‐linking density

Tsyurupa

Blinnikova

Borisov

et al. 2014

J of Separation Science

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The paper describes unexpected properties of hypercross-linked polystyrenes with ultimate cross-linking degrees of 300, 400, and 500%, where three, four, or five methylene links, respectively, could bind each polystyrene phenyl ring to its spacious neighbors. The polymers exhibit a strong electron spin resonance signal, unusual spectra in IR, UV, and visible ranges, and they are not typical dielectrics. The nonfunctionalized hypercross-linked polymers absorb significant amounts of inorganic acids, salts, and bases due to interactions of protons or other cations with electron-donating fragments of the aromatic network with the high extent of mutual connectivity and also due to dispersion interactions of anions with the polymer matrix.

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On the nature of “functional groups” in non-functionalized hypercrosslinked polystyrenes

Cited by 51 publications

References 21 publications

Swellable functional hypercrosslinked polymer networks for the uptake of chemical warfare agents

Swellable functional hypercrosslinked polymer networks for the uptake of chemical warfare agents

Synthesis and adsorption study of hyper-crosslinked styrene-based nanocomposites containing multi-walled carbon nanotubes

Physicochemical and adsorption properties of hypercross‐linked polystyrene with ultimate cross‐linking density

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