Radical scavenging by hydroaromatics in the presence of oxygen

Kubo, Junichi

doi:10.1021/ie00011a025

Cited by 14 publications

(26 citation statements)

References 12 publications

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“…The carbonyl absorbances (1710cm-1 by IR) and the acid values are well consistent with those observations 16) From the analyses (gas chromatography) of the compositional changes in tetralin and OHP, it is clear that more hydrogen is liberated from those hydroaromatics in severer cases such as at higher temperatures or higher O2/N2 ratios. Furthermore, it is clearly shown that more hydrogen is donated from OHP than from tetralin under the same conditions, as illustrated in Fig.…”

Section: Hydrogen-donating Hydrocarbons Used In the Testssupporting

confidence: 84%

Application of Hydrogen-donating Hydrocarbons as Radical Scavengers.

Kubo

1996

Sekiyu Gakkaishi

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Section: Hydrogen-donating Hydrocarbons Used In the Testssupporting

confidence: 84%

Application of Hydrogen-donating Hydrocarbons as Radical Scavengers.

Kubo

1996

Sekiyu Gakkaishi

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“…Most of the components have partially hydroge- effects based on their hydrogen-donating properties, as elucidated below 12 ( tetralin is taken notably changed by the irradiation. That is, it can as the example for the explanation ) : be seen from this table that MFR is remakably diminished by the irradiation, and it seems that crosslinkings proceed, as illustrated in Figure 10.…”

Section: Resultsmentioning

confidence: 99%

“…ported. 12 The reaction rate constants of HHAPs with DPPH at 50ЊC in air assuming first-order 1. HHAPs have much higher radical scavenging abilities than tetralin and 1,2,3,-reactions are demonstrated in Table IV, compared with typical hydrogen-donating hydrocarbons, 4,5,6,7,8-octahydrophenanthrene (OHP).…”

Section: Resultsmentioning

confidence: 99%

“…Although tive crosslinking. 2,3 the conventional antioxidants have effectively In these cases, however, the radical scavengers been used, 2,8 the radical scavengers for this purpose are deemed desirable to be investigated from the viewpoints of radical scavenging effects, resis- and radiation-induced oxidative degradation of petroleum products, 12,16 rubbers, 17 plastics, 18 and thermoplastic elastomers. 19 The superior inhibcomponents.…”

Section: One Of the Most Important Problems In Crosslink-mentioning

confidence: 99%

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Electron-induced crosslinking of polypropylene with the addition of hydrogen-donating hydrocarbons

Kubo

Otsuhata²,

Ikeda³

et al. 1997

J. Appl. Polym. Sci.

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Electron-induced crosslinking of polypropylene with the addition of hydrogen-donating hydrocarbons produced from petroleum (HHAP) together with A-TMPT (trimethylpropanetriacrylate) was studied, and the following results were obtained: (1) Effective crosslinking was achieved at lower doses under 10 kGy. (2) HHAP functions as an effective radical scavenger to suppress scissions. (3) Distinguished improvements in properties such as elongation and heat distortion temperature were achieved by the irradiation. (4) Distinct diminution in melt flow rate and evident increase in average molecular weight with the irradiation at lower doses were observed. (5) It was confirmed that the oxidative degradation during mixing and molding was noticeably inhibited by the addition of HHAP. This effect as an antioxidant during these procedures along with the irradiation seems to be a cause to promote crosslinks. These effects are attributable to the high radical scavenging effects of HHAP and its pure hydrocarbon constitution without functional groups containing heteroatoms.

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“…In deoxygenated fuels, tetralin was only slightly inhibitory at relatively low temperatures. More recently, Kubo [1991Kubo [ , 1992 has demonstrated that tetralin has radical scavenging ability in the presence of oxygen at both 50°C and 350°C.…”

Section: Pyrolysis Of Tetralin With and Without Reactive Compoundsmentioning

confidence: 99%