Adsorption Modification of Dispersed Aluminum: Thermal Desorption Mass Spectrometry of the Modifying Layers

Thermal desorption and thermodestruction of modifiers (short- and long-chain aliphatic carboxylic acids, synthetic butadiene and nitrile rubbers with end carboxyl groups) were studied by thermal desorption mass spectrometry. The results obtained were compared with the thermal stability of individual modifiers. It was shown that the use of dispersed aluminum as a filler decreases the thermal stability of compositions based on butadiene and nitrile rubbers.     

Remarks on mean convergence

In this article a necessary and sufficient condition is established for the validity of the Cauchy criterion in the class of sequences of functions {f_n} of the set (L) which are convergent with respect to the -distance.Translated from Matematicheskie Zametki, Vol.Translated from Matematicheskie Zametki, Vol.     

Application of molecular statistical calculations to the prediction of chromatographic separation of isomeric difluorobiphenyls

Molecular statistical calculations have been used for estimation of the possibility of chromatographic separation of difluorobiphenyl mixtures. GC-MS investigation of the mixture of difluorobiphenyls has been carried out. It is impossible to identify each isomer with only mass spectrometric data due to the similarity of their mass spectra. A chromato graphic column that makes adequate chromatographic separation possible has been selected based on the molecular statistical calculations. The identification of each isomer resulted from combination of the mass spectrometric investigation results and molecular statistical calculations.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 623–626, March, 1996.     

Nonuniform bounds on the error of the normal approximation in H

Translated from Problemy Ustoichivosti Stokhasticheskikh Modelei, Trudy Seminara, pp. 96–103, 1987.     

A new method of measuring the viscoelastic properties of polymer systems in fluid and highly elastic states using forced vibrations in the ultralow-frequency region

A method is considered for measuring the dynamic mechanical characteristics of polyer systems using forced vibrations in the ultralow-frequency region down to 10^–6 Hz. The essence of this method lies in the fact that during the measurement process the motion of the polymer sample is controlled with a set amplitude and frequency, and the dynamic characteristics of the polymer are determined from the controlling mechanical stress. The method is illustrated using the results of measurements of the components of the complex modulus for polybutadiene over a wide range of temperatures and frequencies without making use of superimposition.The Central Constructional Bureau for Prototype Instrument Construction, Academy of Sciences of the USSR, Moscow. Translated from Mekhanika Polimerov, No. 2, pp. 344–347, March–April, 1976.