Investigations of the Influence of Chlorine Contained Aromatic and Maleimide Compounds on the Structure of the Vulcanizates Net on the Base of Polyblend and the Creation Technology of Heat and Radiation Durable Materials

Abstract The structural parameters (mоlеculаr mаss, plasticity, number оf chains' nеt and cross-linked molecules) of thermal vulcanizers on the basis of butadiene-nitrile rubber and polyvinyl chloride blends were studied by viscosity and sоl-gеl аnаlуsis methods. Аn alteration оf polаr groups content (-С≡N, С=О, С-Сl) and unsaturation оf thermal and thermal irradiated vulcanizers were investigated. According to alterations of residual deformation's accumulation, relaxation of tension and equilibrium modulus in air and in fuel, the properties оf elastomers were established at temperature (373-473K) and radiation (1000-2000 kGy) aging

Influence of iron complexes on formation of photosynthetic apparatus and outcome of genetic changes at the gamma irradiated seeds of wheat

Influence of various doses of γ-irradiation on biosynthesis of chlorophyll and carotinoids, and also on a progress of mitotic divisions of meristematic cells of root hairs at sprouting wheat seeds at the presence of pyrocatechol, iron pyrocatecholat, thiocarbamide, iron thiocarbamide, rutine, iron rutinate, juglon and iron juglonate was studied. There was revealed that iron pyrocatecholate, iron rutinate, juglon and iron juglonate possess appreciable radioprotective properties which stimulate adaptive biosynthesis of chlorophyll and carotinoids, and also considerably reduce a number of chromosomal aberrations under irradiation

Study of the Structure and Parameters of Grid of Hydrogenated Butadiene Nitrile Rubber cross-linked with Polymer Peroxides

Abstract Studied the ro le of poly mer pero xide (1,4-b is-tret butyl pero xy isopropyl benzene) and triazine co mpounds (2-phenyl-4, 6-bis-trichloro methyl sym triazine) in hydrogenated butadiene nitrile rubber (HBNR) systems HBNR + Poly meric Pero xide, HBNR + Triazine Co mpounds under heating. By physical and chemical, spectral methods of analysis shown, that the changes in molecu lar structure of HBNR in the presence of poly mer pero xides and triazine co mpounds. Determined the kinetics of yield and the emergence of cross-linking density of the grid HBNR fo r each reaserched system depend on time . It is shown that cross linking of the HBNR with pero xide poly mers occurs by a radical type

Study of Influence of Copolymer Vinyl Chloride and Vinyl Acetate on the Properties of Butadiene Nitrile Rubber

Abstract Influence of a copolymer of v inyl chloride and vinyl acetate to the properties of butadiene nitrile rubber has been studied. It is shown that the growth of the molecu lar weight of BNR by mixing latex rubber and copolymer in a ratio 80:20, 75:25, 65:35 leads to obtaining micro heterogeneous systems. Copoly mer in itially acts as an interstructural amp lifier and then depending on their ratio p lays the role of the dispersed phase in the plasticization. By the method of rheological analysis it was found out that increase of mo lecular weight was observed in the interval time (0-90 min), characteristic viscosity increases with the ratio of 75:25 copoly mer fro m 0.6 to 1.4. A sol-gel analysis showed that with increase in the concentration of the copoly mer in BNR the nu mber o f chains grid (1/Ms) in the rubber decreases. It was found out that consumption of cross linked molecules (1/Mn) for the cross-linking is reduced, it beco mes constant at a ratio of 100:65:25. Co mparison of the kinetics of thermo metallic o xide vulcanization o f BNR with the accelerator disulphide chloride benzene (DSCB) increases the yield concentration of the effective cross-links (n `c) in the molecule BNR. Experiment showed that in the presence of the accelerator DSCB and zinc o xide the structuring main ly goes by the double bond