Fission reactions of the aziridine ring

Reaction of N-arylethylenimines with carbon dioxide in the presence of tetraethylammonium bromide gives N-aryl-2-oxazolidones, with N,N-diarylpiperazines as by-products. Carbon disulfide reacts with N-arylethylenimines under similar conditions to give 11 copolymers, together with small amounts of N-arylthiazolidine-2-thiones. Carbon oxysulfide gives copolymers only. The copolymers are converted at 250° C into N-arylthiazolidine-2-thiones and N-arylthiazolidones, respectively. N-Arylethylenimines react with phenyl isothiocyanates to give 2-phenylimino-3-arylthiazolidines.For part III, see [1].Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 6, No. 5, pp. 611–615, May, 1970.     

The diene synthesis with sulfur-containing derivatives of acrylic acids

Reaction of aqueous solutions of salts of acrylic acids with thioepi chlorohydrin affords thietyl acrylates, which on hydrolysis give 3-hydroxythietane, and on oxidation with hydrogen peroxide give 3-hydroxythietane 1,1-dioxide. The diene synthesis was carried out with these acrylates, and also with acryloyl and methacryloyl isothiocyanates.The authors thanks M. I. Mironova for the IR spectra and the elemantal analyses.     

The role of the porous structure of the filler in the reinfo rcement of polymers

Composites consisting of polyethylene and porous fillers with various pore sizes (from 22 to 115 Å) and surface types have been investigated. It is shown that the polymer filling the pores takes part in the deformation processes. The modulus of elasticity of the filled polymers is directly proportional to the filler surface per gram polymer. It is proposed to characterize the activity of the fillers by reference to the slope of the straight lines E-S with the hydrodynamic effect excluded.Institute of Polymer Mechanics, Academy of Sciences of the Latvian SSR, Riga. Translated from Mekhanika Polimerov, No. 2, pp. 253–258, March–April, 1973.     

Floating orbit method in the theory of synchrotron radiation

The effect of betatron oscillations in weakly focusing accelerators on the polarization-angular distribution and spectrum of synchrotron radiation is considered.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 6, pp. 59–65, June, 1976.The authors take this occasion to thank Prof. V. G. Bagrov for his interest in the work.