Reaction of polyperoxides with triphenylphosphine

Jayanthi, S.; Kishore, K.

doi:10.1002/(sici)1099-0518(199705)35:7<1167::aid-pola2>3.0.co;2-#

Cited by 9 publications

(7 citation statements)

References 15 publications

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“…The intensity of the former peak increases with an increase in the α‐methylstyrene content in the copolyperoxide. There is evidence for the presence of the carbonyl end groups of the type OCHC(CH 3 )(C 6 H 5 ) and terminal groups of the type CH C(CH 3 )(C 6 H 5 ) in poly(α‐methylstyrene peroxide) (PAMSP) 21. Similar results were derived from the FTIR spectra for the other two series of copolyperoxides.…”

Section: Resultssupporting

confidence: 56%

“…In Figure 3, the 1 H NMR spectra of two copolyperoxides of indene/α‐methylstyrene, CP3 and CP5, are shown along with those of the homopolyperoxides, PIP and PAMSP. The signals for PAMSP at 1.46, 4.19, and 7.20–7.25 ppm are assigned to the α‐methyl, CH 2 , and aromatic protons, respectively 21. The compositions of the copolyperoxides given in Table 1 are readily obtained from the ratio of the peak intensities of the CH 2 protons of indene to the CH 3 protons of the α‐methylstyrene units.…”

Section: Resultsmentioning

confidence: 99%

“…In Figure 6, the 13 C NMR spectra of CP3 and CP5 are shown, along with those of PIP and PAMSP. The 13 C NMR spectrum of PAMSP exhibits signals (δ, ppm) at 21.85 (CH 3 ), 78.53 (OCH 2 ), 84.97 (OC), 126.05–127.98 (aromatic carbons), and 142.06 (aromatic ipso carbon) 21. The ratio of the intensities of the methyl carbon of α‐methylstyrene to the methylene carbon of indene gives a direct measure of the copolyperoxide composition.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and characterization of copolyperoxides of indene with styrene, α‐methylstyrene, and α‐phenylstyrene

De¹,

Sathyanarayana²

2002

J Polym Sci B Polym Phys

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The oxidative copolymerization of indene with styrene, ␣-methylstyrene, and ␣-phenylstyrene is investigated. Copolyperoxides of different compositions have been synthesized by the free-radical-initiated oxidative copolymerization of indene with vinyl monomers. The compositions of the copolyperoxides obtained from the 1 H and 13 C NMR spectra have been used to determine the reactivity ratios of the monomers. The reactivity ratios indicate that indene forms an ideal copolyperoxide with styrene and ␣-methylstyrene and alternating copolyperoxides with ␣-phenylstyrene. Thermal degradation studies via differential scanning calorimetry and electron-impact mass spectroscopy support the alternating peroxide units in the copolyperoxide chain. The activation energy for thermal degradation suggests that the degradation is dependent on the dissociation of the peroxide (OOOOO) bonds in the backbone of the copolyperoxide chain. Their flexibility has been examined in terms of the glass-transition temperature.

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Section: Resultssupporting

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and characterization of copolyperoxides of indene with styrene, α‐methylstyrene, and α‐phenylstyrene

De¹,

Sathyanarayana²

2002

J Polym Sci B Polym Phys

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“…The formation of these end groups via various chain transfer mechanisms has been reported in the literature. [20,21] The 1 H-NMR spectra show signals corresponding to methylene and methine protons shifted downfield due to two oxygen atoms directly bonded to it. For the same reason 13 C-NMR spectra also show considerable downfield shift for the backbone carbon atoms.…”

Section: Resultsmentioning

confidence: 99%

para-Substituted Poly(styrene peroxide)s: Synthesis, Characterization, Thermal Reactivities, and Chain Dynamics Studies in Solution

De¹,

Sathyanarayana

2002

Macromol. Chem. Phys.

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“…Two other suggested mechanisms proceed via a cyclic peroxide intermediates (Eqs. 2 and 3) (Davies and Feld, 1958;Jayanthi and Koshore, 1997). The main application of the TPP-TPPO method is the determination of hydroperoxides from the autoxidation of oils and fats (Gotoh et al, 2011;Nakamura and Maeda, 1991;Wang et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Application of time-of-flight aerosol mass spectrometry for the real-time measurement of particle-phase organic peroxides: an online redox derivatization–aerosol mass spectrometer (ORD-AMS)

Weloe

Hoffmann

2020

Atmos. Meas. Tech.

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Abstract. Aerosol mass spectrometers (AMS) are frequently applied in atmospheric aerosol research in connection with climate, environmental or health-related projects. This is also true for the measurement of the organic fraction of particulate matter, still the least understood group of components contributing to atmospheric aerosols. While quantification of the organic and/or inorganic aerosol fractions is feasible, more detailed information about individual organic compounds or compound classes can usually not be provided by AMS measurements. In this study, we present a new method to detect organic peroxides in the particle phase in real-time using an AMS. Peroxides (ROOR') are of high interest to the atmospheric aerosol community due to their potentially high mass contribution to SOA, their important role in new particle formation and their function as “reactive oxygen species” in aerosol–health-related topics. To do so, supersaturated gaseous triphenylphosphine (TPP) was continuously mixed with the aerosol flow of interest in a condensation/reaction volume in front of the AMS inlet. The formed triphenylphosphine oxide (TPPO) from the peroxide–TPP reaction was then detected by an aerosol mass spectrometer (AMS), enabling the semiquantitative determination of peroxide with a time resolution of 2 min. The method was tested with freshly formed and aged biogenic VOC and ozone SOA as well as in a short proof-of-principle study with ambient aerosol.

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Reaction of polyperoxides with triphenylphosphine

Cited by 9 publications

References 15 publications

Synthesis and characterization of copolyperoxides of indene with styrene, α‐methylstyrene, and α‐phenylstyrene

Synthesis and characterization of copolyperoxides of indene with styrene, α‐methylstyrene, and α‐phenylstyrene

para-Substituted Poly(styrene peroxide)s: Synthesis, Characterization, Thermal Reactivities, and Chain Dynamics Studies in Solution

Application of time-of-flight aerosol mass spectrometry for the real-time measurement of particle-phase organic peroxides: an online redox derivatization–aerosol mass spectrometer (ORD-AMS)

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