Sorption of vapors of various substances by hypercrosslinked “styrosorb” polystyrenes

Belyakova, L. D.; Schevchenko, T.I.; Davankov, V. A.; Tsyurupa, M. P.

doi:10.1016/0001-8686(86)80011-2

Cited by 38 publications

(15 citation statements)

References 13 publications

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“…Another approach that will be briefly discussed in this section is called the Davankov approach [93]. This approach is based on the formation of extensive post-crosslinking between the phenyl groups on the PS resin via Friedel-Crafts reactions [94].A bis-halide such as dichloroethane is needed together with the catalyst FeCl 3 to form the bridges between the phenyl groups of pure PS resins [95] and FeCl 3 alone is sufficient for post-crosslinking PS resins containing 4-(chloromethyl)styrene comonomer [96].…”

Section: Davankov Approach: Hypercroslinking the Phenyl Ringsmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

446

309

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Section: Davankov Approach: Hypercroslinking the Phenyl Ringsmentioning

confidence: 99%

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Gökmen

Prez

2012

Progress in Polymer Science

446

309

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“…Figure 3 shows the adsorption isotherms of water on the PS under study and on AC for comparison. It is obvious that the adsorption isotherms of water on the S -specific pore surface, calculated from the BET equation, W -adsorption space calculated from the adsorption isotherm of n-pentane (Belyakova et al, 1996); a m is calculated from the comparison plots . That points to equal amounts of PAS in both polymer sorbents.…”

Section: Dr Equation Ds Equationmentioning

confidence: 99%

Adsorption and Mobility of Water and Benzene Molecules in Carbon and Polymer Adsorbents

Khozina¹,

Vartapetyan²

2005

Adsorption

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The correlation between the adsorption and the mobility of adsorbed molecules was analyzed. The peculiarities of molecular mobility in microporous adsorbents with relatively rigid (active carbons) and non-rigid (polymer super-crosslinked and methacrylate sorbents) structure were studied using pulsed nuclear magnetic resonance (NMR) techniques. It was shown that the translational behavior of water and benzene in pores are connected with the specific adsorption mechanism. The NMR data allowed analyzing the changes of molecular state in the processes of adsorption. Diffusional properties of water molecules in the super-crosslinked polystyrenes and active carbons with relatively rigid framework are similar and differ from that in methacrylate polymer sorbents. Moreover, the results of NM relaxation measurements allowed analyzing the porous structure over the scale of pore sizes, while the scale of the self-diffusion measurements comprises the areas of different porosity. The NMR data agree well with the data of adsorption measurements and complement them.

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“…Details of the experiment were given earlier in [22]. It was found there that the corrected (according to IUPAC 3.…”

Section: Contradiction Between the Traditional And Thermodynamic Intementioning

confidence: 99%

“…Thus, the isosteric heat of adsorption of benzene on hypercrosslinked polystyrene (differential molar heat of adsorption) can be calculated from the slope of the van't Hoff plot of In Vw as function of 1/Tc. Correct treatment of data from [22] results in the value of 51.5 kJmole 1. When, however, retentions "reported at standard conditions" are taken for plotting, the slope appears steeper and the adsorption heat higher, 55.5kJmole 1.…”

Section: Contradiction Between the Traditional And Thermodynamic Intementioning

confidence: 99%

Critical reconsideration of the physical meaning and the use of fundamental retention parameters in gas chromatography. New IUPAC recommendations

Даванков

2003

Chromatographia

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SummaryThe term "corrected retention volume" V/~ was introduced by Martin and James in 1952 and is the most important retention parameter in gas chromatography. Its calculation involves multiplication of the measured volume with the "compressibility correction factor" 3 (pi/po) 2 1 Followers misinterpreted the James and Martin statement that the finally obi -2 (hi~no) 3 1 tained "V/~ is the limiting value of VR as PJPo tends to unity" and introduced an additional recalculation of the corrected retention volume to standard conditions, 273 Kand p = 1 atm.The use of standard conditions has resulted in publication of a great deal of distorted thermodynamic data, and has largely resulted in the cessation of the use of GC to collect such data. Examples of distortions of thermodynamic data are given to demonstrate the need for not using "standard" conditions. The distortion imposed by correction to standard conditions has had almost no impact on the explosive growth of GC as an analytical technique, but has limited its use for more fundamental physical measurements.The physical meaning of the / 2 factor is the ratio of the gas pressure at the column outlet to the pressure in the column averaged over the column length i 2 = po/~. This unambiguously 3 defines the corrected retention volume as the analyte retention volume measured atthe column outlet and then recalculated to the column temperature and averaged column pressure: Vp, = vR,o(r~/ro)i~ = vR(r~/ro)(po/~).

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Sorption of vapors of various substances by hypercrosslinked “styrosorb” polystyrenes

Cited by 38 publications

References 13 publications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Porous polymer particles—A comprehensive guide to synthesis, characterization, functionalization and applications

Adsorption and Mobility of Water and Benzene Molecules in Carbon and Polymer Adsorbents

Critical reconsideration of the physical meaning and the use of fundamental retention parameters in gas chromatography. New IUPAC recommendations

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