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Benzene absorption in EPR and clustering mechanism

✍ Scribed by M. Pegoraro; M. Nascimbene; G. Pagani; A. Penati

Book ID
103071907
Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
363 KB
Volume
14
Category
Article
ISSN
0014-3057

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✦ Synopsis

Benzene equilibrium absorption curve by EPR rubber (50 wt % C3) was measured at 23Β°C. Benzene activity a~ was plotted against its volume fraction (Pt. Benzene clustering function G~/vt was calculated according to Zimm and the mechanism of formation of benzene clusters is discussed. It was found that clusters at very low benzene partial pressures are monomolecular and randomly distributed: at higher partial pressures, clusters increase in size. Flory-Rehner theory, giving activity a~ against tp~, was checked; predictions of cluster formation were made but there were some discrepancies with Zimm's conclusions.

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The direct absorption spectra of benzene in jets are measured in the wavelength region of the SZ and Ss system, using synchrotron radiation (SR) as a light source. Two broad absorption maxima are found at 208 and 185 nm and assigned, respectively, to the Ss and the Ss absorption system of benzene cl