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1, 2018

Development of the Processing of Styrene-Butadiene Diblock Copolymer Production

Vagizov A.M. (Ph.D. [Chem.], Head of Lab. R&D Department), Gazizov I.G. (Process Engineer, R&D Department), Galimov R.R. (Deputy Head of R&D Department), Akhmetov I.G. (D. Sc. [Chem.], Head of Lab. R&D Department), Sakhabutdinov A.G. (Ph.D. [Chem.], Chief Process Engineer)

The process of styrene-butadiene diblock copolymer (SBDC) production in the presence of the initiating system based on n-butyllithium (initiator) mixture of alkoxides of alkali and alkaline earth metals (modifier) was studied. The effect of the modifier on kinetics of the copolymerization process and the characteristics of copolymer produced was investigated. The influence of the concentration of styrene units in copolymer on the final characteristics of rubber was also studied. Optimum rate of the copolymerization process and the required level of micro- and macrostructure of copolymer is provided at a molar ratio of initiator to modifier 1:0,05. The results of commercial development of the technology of SBDC production were described. Dependences of long-term run of polymerizer, plant capacity, and block distribution of monomer units in copolymer on the apparatus design, temperature and other technological parameters of the continuous process of SBDC production were shown.

Key words: block copolymer, anionic polymerization, butadiene, styrene, dynamic (solution) viscosity, copolymerization, microstructure

The Effect of Dispersing Additives and Conditions of the Preparation of Talc Concentrate in Polypropylene on the Properties of PP / EPDM / Talc Compositions

Kazakov Yu.M. (Ph. D. [Techn.], Gen. Director), Volkov A.M. (Ph. D. [Chem.], Chief Expert), Ryzhikova I.G. (Ph. D .[Techn.], Chief Expert), Bauman N.A. (Ph. D. [Techn.], Head of Lab.), Volfson S.I. (Prof., D. Sc. [Techn.], Chief of hair)

The possibilities of influence of dispersants (D) and conditions of the preparation of concentrate of talc in PP (Ct) on the efficiency of the EPDM phase dispergation in the PP matrix were revealed. D were introduced in preliminary prepared Ct. Known D were in use: amide, polyester and other waxes. Talc content in Ct and the base PP fluidity were also changed. The two-screw extruder LTE-20/44 (LabTech Ingineering Co.) for the preparing of Ct and PP/EPDM/talc compositions was used. Preparation of PP/EPDM/talc compositions was carry out in reaction extrusion condition. Certain specificity of the D action and a significant effect of the above mentioned conditions of Ct preparation on the fluidity, impact and strain-strength properties of the final compositions were showed. The results of the experiments can be explained by the different depth of the talc disagglomeration process, as well as by contribution of the process of the base PP mechanical degradation in the resulting concentrate.

Key words: ethylene-propylene diene rubber, PP, microtalc, dispersants, fluidity, impact strength, strain-strength properties

Investigation of Influence of Dispersions of Rice Husk Recycling Products on the Properties of Elastomer Composites

Kornev Yu.V. (Ph.D. [Techn.], Sen. Res.), Eymelaynov S.V. (Ph.D. [Chem.], Assist. Prof.), Lukyanova A.Yu. (Student), Semenov N.A. (Ph.D. [Techn.], Sen. Res.), Spiridonova E.Ch. (Student), Guskov D.V. (Sen. Lab. Assist.)

Influence of dispersion of products of processing of rice husk (PPRH) of Neosil brand (Neosil-120 and Neosil-150), which are used as fillers, on properties of elastomeric composites on the basis of SKS-30ARK rubber, was investigated. The results were compared with the data for silica Zeosil 1165MP. Fillers were introduced in the amount of 65 phr. Dependence of the real component of the complex dynamic shear modulus G from strain for rubber compounds was determined on the apparatus HAAKE RheoStress RS 150 at a frequency of 10 Hz and a temperature of 60 C in the range of relative deformation of 0,0010,3 mm. For measuring mechanical properties at the microscale, the measuring complex Nanotest 600 (Micromaterials) with spheroconical indenter of 10 m diameter at maximum load of 5 mN was used. The analysis of changes in the parameters of PPRH structure was carried out by scanning electron microscope Joel JSM-6510LV. Mechanical tests of the vulcanizates were carried out by universal tensile testing machine UTS-10, according GOST-270-75. It was found that after grinding there is an increase of breaking elongation of elastomer composites with PPRH, tensile strength increases from 2 to 8 MPa, this effect is associated with a significant reduction in the average size of the particles. However, for composites with Zeosil 1165 MP, of higher dispersity the data is higher (12 MPa). As a result of PPRH grinding, the spread of microindentation indices decreases, due to the high homogeneity of the structure of the elastomer composite material. The difference of vulcanization characteristics for composites with Neosil-120 and Neosil-150 is noted.

Key words: SBR, elastomer composites, fillers, rice husk, silica, dispersity, mechanical properties, reinforcement, Pein effect, microindentation, vulcanization characteristics

On the Prospects of the Production of Light and Colored Technical Rubber Goods on the Lines of Continuous Vulcanization with the Use of Microwave Heating

Gogolev A.M. (Postgrad. Stud.), Reznichenko S.V. (Prof., D. Sc. [Techn.], Head of Department), Petrogradskiy A.V. (Ph. D. [Chem.], Sen. Res.), Emelianov S.V. (Ph. D. [Chem.], Assist. Prof.), Reznichenko D.S. (Ph. D. [Techn.], Deputy Gen. Director), Boksha M.Yu. (Ph. D. [Techn.], Head of Sector)

Kinetics of microwave heating of model rubber compounds based on non-polar natural and synthetic isoprene, ethylene propylene and butyl rubbers as well as polar BNR, containing light inactive and active fillers, small amount of carbon fibers and other additives have been studied. Measurements were conducted with the use of both industrial equipment and developed laboratory technique simulating this process (2450 Hz, 800 Wt). IR pyrometer of double laser detector was in use for temperature measurements. The laboratory method based on comparison of obtained data was developed. The prospect ways of creation of receipts of light-colored rubbers for processing on extrusion lines with microwave heating were determined.

Key words: UHF heating, IR pyrometer, butyl rubber, ethylene-propylene rubber, BNR, NR, silica white, titanium oxide, magnesium oxide, aluminum, carbon fibers, extrusion

Investigation of Swelling Processes of Packer Rubbers in Water

Prokhorova S.N. (MS Student), Potapov E.E.(Prof., D. Sc. [Chem.]), Iordanskii A.L. (Prof., D. Sc. [Chem.], Head of Lab.), Ivanov V.V.( Ph. D. [Chem.], Assist. Prof., Sen. Res.), Pyatov I.S. (Ph. D. [Techn.], Assist. Prof., Chairman of the Board of Directors)

The kinetics of water swelling of standard packer rubbers based on BNR, and the influence of hydrophobizing organosilicon liquids (HPL) of various compositions on this process have been studied. HFL studied are: metyltrimetoxysilane (MTMOS), phenyltrimetoxysilane (PTMOS), octyltriethoxysilane (OTMEOS), phenylmetyldimetoxysilane (PMDMOS), phenyltriethoxysilane (PTEOS). There are two parts of kinetic curves. In absence of HPL swelling maximum of 1100 % is at 2 days, than it decrease to 600700 % as a result of washout of water-absorbing agent. It was shown that preliminary swelling in the HPLs with the phenyl groups significantly slows the water swelling in the initial stages of the process, the washout of the water-absorbing agent from the packer rubber is significantly reduced, and a high degree of swelling at the late stages of this process remains. Diffusion activity of HPL is in order PTMOS > PMDMOS > MTMOS > S > OTEOS. Mechanism of these effects is under discussion. Thus, the use of hydrophobizing organosilicon liquids of various types makes it possible to program the process of water swelling of packer rubbers during their operation.

Key words: water absorption, packer rubber, hydrophobizing organosilicon liquids

Factors of the Formation Perfect Structure of Nanorganization in Polymers

Sokolova L.V. (Ph.D. [Chem.], Assist. Prof.), Sadykova I.R. (aspirant)

The effect of the different factors including the cohesive energy Ec on the formation of nanorganization in polymers were studied. Polymers studied are: cis-1,4-polybutadiene (PB), cis-1,4-polyisoprene (PI), polyisobutylene (PIB), fluorine-containing rubbers SKF-26 and SKF-32, polyacrilonitrile (PAN), data for polystyrene (PS) are also in use. Changes of polymer nanorganization in presence of zinc oxide were examined. X-ray diffraction patterns in big angles were obtained in transmission mode on the Bruker D8 Advance, the diffusion coefficients and equilibrium solubility ofpenetrant (diphenylguanidine) were determined using the diffusion method described earlier, dynamic viscosity was examined by reometer RPA 2000 (Alfa Technologies). The data for PB, PI, SKF and PAN and show the important role of Ec, influence of the other factors are analyzed with the data of studied polymers. The statement that nanorganization is the fourth phase state of polymers of different chemical structures was formulate.

Key words: nanorganization, PB, PI, PIB, PAN, PS, fluorine-containing rubbers, ZnO, X-ray diffraction patterns in wide angles, diffusion coefficient, equilibrium solubility, dynamic viscosity, structure transition

The Analysis of Isoprene Rubbers Microstructure: Modern Aspects

Makhiyanov N. (Ph. D. [Phys.-Mat.], Deputy Head of Lab.)

The main results of isoprene rubbers structure studied by NMR spectroscopy, obtained by the author in JSC Nizhnekamskneftekhim, are presented. The problem of determining of microstructure of industrial polydiene rubbers is demonstrated with synthetic isoprene rubber SKI-3. Advantages and disadvantages of IR-spectroscopy and high resolution NMR as well as some metrological aspects such as trueness, precision, the possibility to use in industry, including on-line analysis, are under consideration.

Key words: SKI-3, microstructure, high resolution NMR, IR-spectroscopy, precision

MonTech ompny

Achievements and prospects of the Company MonTech in development and creation of variety of equipment for rubber tests are presented by the Chiefs of the Company.

Key words: markets, sales, marketing, production organization, automation, testing cell systems, equipment for rubber tests, lab moulds

The Employment of Calculation Programs for Forecasting the Service Life of Rubbers and Technical Rubber Goods

Vakulov N.V. (Postgrad. Stud.), Myshlyavtsev A.V. (Prof., D. Sc. [Chem.], Prorector), Malyutin V.I. (Res.), Zvonov A.O. (Eng.-Des.)

The possibilities of the Matlab-based calculation programs employment for forecasting the rubber and technical rubber goods service life were revealed. Results of accelerated thermo oxidative aging of three rubbers: K-14-1 (60 phr of SBR + 40 phr of BR, sulfur vulcanizing system); K-16-1 (80 phr of SBR + 20 phr of EPDM, thiuram-sulfur vulcanizing system); K-16-2 (70 phr of PCP + 30 phr of BNR, peroxide vulcanizing system) are presented. Breaking elongation was chosen as most significant parameter of aging. Results of manual processing of experimental data are compared with results obtained by Matlab: for rubber K-14-1 with service life at 25 º, obtained from master curve based on data at temperatures from 70 to 100 º; for rubber K-16-1 with parameters of kinetic curves at temperatures from 50 to 125 º; for rubber K-16-2 with calculation of condition of rubber-cord elements accelerated aging with rubber K-16-2 at different conditions of warehousing, transportation and exploitation. At all examples the high convergence at minimum time is shown.

Keywords: rubber, aging, aging results processing, mathematical modeling, technical rubber article

Ways of Improving the Properties of Rubber Blends Based on BNR for Hose Manufacture

Yurchenko A.Yu. (Res.), Morozov Yu.L. (Prof., D. Sc. [Chem.], Consultant of Gen. Director), Rakhmatulin T.T. (Res.), Emelianov S.V. (Ph. D. [Chem.], Assist. Prof.)

Review of the papers devoted to development of oil- and cold-resistant technical rubbers based on BNR for hoses. The choice of BNR types including their blends, curing agents, the use of modifiers including polyethylene in combination with ceolites, and fullerenes are under consideration.

Key words: hoses, BNR of different types, rubber blends, curing, oil resistance, cold resistance, polyethylene, ceolites, fullerenes

Summary of 21-th International Specializing Exhibition Interplastica-2018

Ushakova O.S. (Marketing Manager)

Post-Release on two united Exhibitions: Interplastica and Upakovka, organized by Messe Duesseldorf GmbX jointly with subsidiary company OOO Messe Duesseldorf Moscow. 940 exponents from 34 countries, 24900 specialists tacked part in the work of Exhibitions. The work of Interplastica is presented in details (2326.01.2018, Expocenter, Moscow).

Key words: exhibition, row materials, machinery, plastics, innovations, recycling

Summary of International Exhibition Chemistry-2017

Post-Release on International Exhibition Chemistry-2017. 419 companies from 23 countries and more than 16000 specialists tacked part in the work of Exhibition. V Moscow International Chemical Forum was the center of the busy business program of Exhibition. (2326.10.17, Expocenter, Moscow).

Key words: exhibition, row materials, machinery, innovations, small business, low-tonnage chemistry, export, education, Industry 4.0, digital technologies

© « « », 2018 .