Kinetic relationships and mechanism of ozone reaction with polystyrene in CCl<sub>4</sub> solution

Kefely, A.A.; Rakovski, S. K.; Шопов, Д.; Разумовский, С. Д.; Rakovski, R. S.; Заиков, Г. Е.

doi:10.1002/pol.1981.170190905

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…In fact, formation of peroxides has been reported during the oxidation of other plastics. 31,32 Unfortunately, the photolysis of ozone induces a slightly blue colour and a high fluorescence background in the oxidized plastics. Consequently, this method is not suitable for the surface modification of plastics devices that are based on fluorescence detection.…”

Section: Surface Chemistry and Immobilization Of Dna On Poly(cyclic Omentioning

confidence: 99%

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

et al. 2007

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/npsi/ctrl?action=rtdoc&an=3539033&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=3539033&lang=frAccess and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1039/b700322fLab on Chip, 7, 2007-01-01 Microarrays have become one of the most convenient tools for high throughput screening, supporting major advances in genomics and proteomics. Other important applications can be found in medical diagnostics, detection of biothreats, drug discovery, etc. Integration of microarrays with microfluidic devices can be highly advantageous in terms of portability, shorter analysis time and lower consumption of expensive biological analytes. Since fabrication of microfluidic devices using traditional materials such as glass is rather expensive, there is great interest in employing polymeric materials as a low cost alternative that is suitable for mass production. A number of commercially available plastic materials were reviewed for this purpose and poly(methylmethacrylate) Zeonor 1060R and Zeonex E48R were identified as promising candidates, for which methods for surface modification and covalent immobilization of DNA oligonucleotides were developed. In addition, we present proof-of-concept plastic-based microarrays with and without integration with microfluidics.

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Section: Surface Chemistry and Immobilization Of Dna On Poly(cyclic Omentioning

confidence: 99%

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

et al. 2007

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“…The MALDI mass spectrum for this polymer closely resembled the ozonolysis/MALDI mass spectrum for polybutadiene in Figure . Since the reaction rate constant for ozonolysis of polybutadiene is approximately 6 orders of magnitude greater than for ozonolysis of polystyrene, , the absence of signals in the mass spectra due to styrene oligomers is not surprising. After 2 h of ozonolysis, the mass signals due to butadiene oligomers decreased substantially, and no styrene oligomers were detected.…”

Section: Resultsmentioning

confidence: 99%

Microstructures of Butadiene Copolymers Determined by Ozonolysis/MALDI Mass Spectrometry

Zoller

Johnston

2000

Macromolecules

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Matrix-assisted laser desorption/ionization (MALDI) mass spectrometry of ozonolysis degradation products was used to determine the microstructures of several butadiene copolymers. A random styrene−butadiene copolymer containing 45 wt % styrene was distinguished from a block (ABA) styrene−butadiene copolymer containing 38 wt % styrene. In addition, several acrylonitrile−butadiene copolymers with acrylonitrile contents ranging from 21 to 51 wt % were analyzed. The microstructures for the acrylonitrile−butadiene copolymers were confirmed to be fairly random. Quantitatively, the acrylonitrile compositions determined by ozonolysis/MALDI-MS were close to the reported values for these copolymers (typically within 5 wt %). The discrepancy between the reported and experimentally obtained compositions may be attributed, in part, to a composition bias arising from the ozonolysis process. A simple model for ozonolysis of a random copolymer was developed to investigate the effects of ozone exposure time on the oligomer distributions observed in the MALDI mass spectra.

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“…Early studies of pyrene degradation by O 3 were carried out in different organic solvents including methanol [4], and t-alcohol [5]. Kefely et al [6] studied the kinetics and mechanism of ozone with polystyrene using CCl 4 as a solvent. Lugube et al [7] identified byproducts from ozonation of a concentrated naphthalene solution using H 2 O/CH 3 OH (50/50, v/v) as the cosolvent and found a reaction stoichiometric ratio of 2 moles of O 3 per mole of naphthalene removed.…”

Section: Introductionmentioning

confidence: 99%

Ozonation of polycyclic aromatic hydrocarbon in hexane and water: Identification of intermediates and pathway

Youngik

Hong

2007

Korean J. Chem. Eng.

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The recalcitrant nature of pyrene and other polycyclic aromatic hydrocarbons (PAHs) lies in part in their low solubility in water, rendering them less susceptible to chemical and biological degradation. To overcome this remediation obstacle, this work investigates the use of a 2-stage ozonation process, first in nonpolar hexane phase then in polar aqueous phase, for the treatment of hydrophobic contaminants using pyrene as a model compound. The objectives of this research are to break down pyrene by using ozonation, identify the intermediates of pyrene, show a general degradation pathway of pyrene subject to ozonation and test the biodegradability of intermediates and byproducts of pyrene in the aqueous phase. The first stage briefly ozonates the contaminant at high concentration in organic solvent hexane, which facilitates very efficient conversion of the hydrophobic compounds into ring-opened polar intermediates containing alcohol, aldehyde, and acid functional groups.

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Kinetic relationships and mechanism of ozone reaction with polystyrene in CCl₄ solution

Cited by 9 publications

References 3 publications

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

Microstructures of Butadiene Copolymers Determined by Ozonolysis/MALDI Mass Spectrometry

Ozonation of polycyclic aromatic hydrocarbon in hexane and water: Identification of intermediates and pathway

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Kinetic relationships and mechanism of ozone reaction with polystyrene in CCl4 solution

Cited by 9 publications

References 3 publications

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

Surface modification of thermoplastics—towards the plastic biochip for high throughput screening devices

Microstructures of Butadiene Copolymers Determined by Ozonolysis/MALDI Mass Spectrometry

Ozonation of polycyclic aromatic hydrocarbon in hexane and water: Identification of intermediates and pathway

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Kinetic relationships and mechanism of ozone reaction with polystyrene in CCl₄ solution