Abstracts

№1, 2019

Effect of Method of Production of Styrene-Butadiene Diblock Copolymers on Their Micro- and Macrostructure

Gasisov I.G. (Processing Engineer), Trifonova O.M. (Ph. D. [Techn.], Deputy Director), Khusainova G.R. (Chief of Lab.), Akhmetov I.G. (D. Sc. [Techn.], Chief of Lab.)

Review (40 publications) and analysis of literature data concerning the methods of technological design of the processes for the production of styrene-butadiene diblock copolymers and their effect on copolymers micro- and macrostructure.

Key words: block copolymer, anionic polymerization, batch and continuous process, butadiene, styrene, solution viscosity, copolymerization

Natural or Synthetic Isoprene Rubber – Consumer Selection

Vasil’ev V.A. (Prof., D. Sc. [Chem.])

Plantation zoning of NR and history of production of synthetic isoprene rubber (SKI) are briefly described. Information on properties of rubber composition and vulcanized rubber based on NR and SKI is presented. Their structure, physical and mechanical properties as well as processing ones are under comparison. Both similarity and difference of NR and SKI properties are connected with similarity and differences of their structure. Data on level and fields of application of NR and SKI, including use of NR at production of tires of large dimensions are under consideration. The features of pricing and interdependence of NR and SKI prices are also under consideration. Conclusions on necessity of taking into account all these factors in deciding on NR or SKI at production of tires and other rubber goods are presented.

Key words: NR, synthetic isoprene rubber, properties, consumption

Synthesis and Properties of Styrene-Butadiene Carboxylated Latexes Obtained by Semi-Continuous Method

Shelamova E.Yu. (Jun. Res.), Chelnokov P.A. (Jun. Res.), Zhurihina M.A. (Lead. Res.), Korystina L.A. (Ph. D. [Techn.], Lead. Res.), KotovaT.V. (Jun. Res.)

Process of synthesis of styrene-butadiene carboxylated latexes by semi-continuous method has been developed. This process opens the possibility to regulate the size of latex particles, Due to the release of its own heat during the reaction the energy consumption decreases in comparison with continuous method. To regulate the temperature and pressure in the synthesis process by changing the monomers feed rate is also possible. The properties of two latexes of different glass transition temperatures of copolymers are presented. The narrower particles size distribution in comparison with other methods is shown. Mechanical properties of films obtained by drying on cellophane are measured. The latexes were in use as a binding agent in the manufacture of floor carpets. Consumer properties of latexes are determined. They suited all the requirements of consumers and the level of properties of European analogues.

Key words: water dispersion of polymers, emulsion polymerization, carboxylated styrene-butadiene latexes, particles size distribution, floor carpets.

Dependence the SKI-3, SKI-5 Based Rubber Compounds Properties from the Antiagglomerators Type (Calcium Stearate, Quantislip® - BM-2R)

Kavun S.M. (Ph.D. [Chem.], Chief Specialist), Goryachev Yu.V. (Chief of Lab.), Medjibovsky A.S. (D. Sc. [Techn.], Chairman of the Board), Kosso R.A. (Processing Specialist), Nasyrov I.Sh. (Ph.D. [Chem.], R&D Deputy Gen. Director), Faizova V.Yu. (Ph.D. [Chem.], Chief of Lab.), Sokolovsky A.A. (Ph.D [Techn], Chief of Lab.), Litvinova I.A. (Jun. Res.), Gamlitsky Yu.A. (Ph.D. [Phys-Mat], Chief Res.)

For understanding of distinctions reasons of industrial tire rubber compounds, based on serial and trial lots of the synthetic polyisoprene (IR) SKI-3 (with titan containing catalyst) and SKI-5 (with neodymium one), released with the use of Calcium Stearate (Ca(St)2) Suspension and Antiaglomerator “KVANTISLIP® BM-2R”, also of some advantages in the Strength properties and Hysteresis of the latter the role of stearic acid (StH) which isn't in specifications on skilled IR was studied. With the FTIR spectra (Nicolet IR-spectrometer of Avatar 360 trade mark) of the IR's samples under investigation the bands of 1560 and 1520 cm-1 were found, inherent for Ca(St)2 crystals. At the samples of trial lots of IR's with BM-2R the CaSt2 IR bands are absent. Also it was established that in all studied IR there are no band of 1710 cm-1 characteristic for StH. That is, there is no stearic acid neither in skilled, nor in serial rubbers. That means the presence at outdated GOST 14925 the item "mass fraction of stearic acid" is caused by impossibility of separate definition of CaSt2 and StH by the technique given in GOST.

With the use of thermomechanical analysis (TMA) the influence of CaSt2 presence, which is only in serial PI, on the glass and crystallization temperatures of the model peroxide vulcanizates (PV) of the skilled and serial PI's without any complicated impurities, including the deleted peroxide decomposition products, were studied. The results obtained with TMA are compared with the tensile strength and hysteresis properties of model PV, and their distinctions are interpreted taking into account differences in the microstructure of the studied PI.

The tensile strength values for PV of skilled PI are higher, and hysteresis are lower, than for vulcanizates of serial PI, the dispersions of this values being significantly lower (by 2–3 times) for PV of skilled PI, especially at the case of SKI-5, not contained the gel fraction.

Key words: cis-1,4-Polyisoprene, s-synthetic rubbers, releasing agents, antiaglomerator, SSR production, SSR releasing, IR-spectroscopy (FTIR), stress-strain properties

Silanization. P.1.

Dorozhkin V.P. (Prof., D.Sc. [Chem.]), Mokhnatkina E.G. (Ph. D. [Techn.]), Zemsky D.N. (Director, Ph. D. [Chem.])

Review (88 publications) and analysis of the data, devoted to chemistry and physical chemistry of the use of silica in rubber industry and the effect of silanization on the properties of obtained rubber compounds and vulcanizates.

Key words: silica, silanization, silanization kinetics, silane, TESPT, activation energy, dispersity, flocculation, hydrophobization, viscosity, vulcanization, physical and mechanical properties, tgδ, Payne effect.

Application of Polymethylsilicone Liquid PMS-400 in Rubber Compounds Containing Silica

Shilov I.B. (Ph.D. [Chem.], Assist.Prof.), Fomin S.V. (Ph.D. [Techn.], Director), Sedlova N.G. (postgraduate student), Kozulin D.A. (Ph.D. [Chem.], Deputy Director)

The possibilities of the use of polymethylsilicone liquid PMS-400 as a processing additive (PA) to rubber compounds containing silica as fillers (S) Zeosil 1165 MP, Coupsil 8113 GR as well as «white black» BS-100 are under consideration. The interaction of PMS-400 and the surface of S was studied by IR spectroscopy (FTIR-8400S фирмы Shimadzu) in the absorption region of silanol groups. PMS-400 was adsorbed on untreated filler's surface from solution in carbon tetrachloride. The broadening of the absorption band corresponding to hydroxyl group and its shift to lower frequency by 108 cm-1 is shown. It assumed to be connected with hydrophobization of S surface and results in the better dispersion of S in elastomer matrix. Physical and mechanical properties of vulcanized rubbers based on general-purpose rubbers were studied: tensile strength fр, stresses at elongations 100 and 300 % (f100 and f300), breaking elongation εр, hardness Н. Under increase of PMS-400 to 2,5 phr in rubbers of Coupsil 8113 GR, fр and εр significantly increased, f100 and f 300 decreased. These changes are lower for filler of lower activity (BS-100). The use of 1,5–3,5 phr PMS-400 is possible, optimum content of PMS-400 is 2,5 phr. Under introduction of PMS-400 as PA viscosity of all rubber compounds of S decreased significantly. Thus, PMS-400 can be recommended as PA for the reduction of the viscosity of rubber compounds containing S as filler.

Key words: polymethylsilicone liquid, processing additive, silica as fillers, IR spectroscopy, viscosity, physical and mechanical properties

Structure and Calculation of Filler Content of Particle-Filled Elastomeric Materials in Mass and Volume Units

Simonov-Emelyanov I.D. (Prof., D.Sc.[Chem.], Chief of Lab.)

Particle-filled elastomeric materials (PFEM) containing fillers of different density from minimum (air) to maximum (platinum) are under consideration. Using as an example the cube of PFEM filled with balls the necessity of the use of volume units (vol. fractions or vol. %) is shown. Parameters of the structure, the filler content of elastomer, and the dependencies of the property – the parameters of the structure should be presented only in volume units. The data of calculation of the structure and composition of PFEM of various fillers and polymer matrices are presented. Calculations of the compositions in mass units are allowed for the calculation of weighing at PFEM production.

Key words: elastomers, polymers, fillers, composite materials, calculation of composition, structure and compositions of dispersed systems

The Use of Ethylene-Propylene Rubber for the Preparation of Blend Compositions Based on Recycled Polypropylene

Fakhretdinov R.K. (General Director), Galiev R.L. (chief technologist), Zakharov V.P. (Prof., D. Sc. [Chem.])

The physical and mechanical properties of blend (BCOM) based on recycled polypropylene (RPP) and ethylene-propylene rubber (SKEPT) and compositions of RPP and SKEPT, we named arbitrary as «dynamic thermoplastic elastomers» («TPV») have been studied with respect to the production of plastic products by molding under pressure. Decrease of the elastic modulus (Е), strength (fp) and elongation at break (εр) of RPP in comparison to primary raw materials was shown. For both BCOM and «TPV» decrease of Е, fp and maximum torque during rotation of the rotors in the mixing chamber of plastograph (MH) with increase of SKEPT content with «TPV» of lower Е, MH, fp and εp values were also shown. According the results of production of pilot lots of plastic shovels for snow removal by casting under pressure, SKEPT content of not more than 16 phr is optimal from the point of view of physical and mechanical properties.

Key words: recycled polypropylene, ethylene-propylene rubber, blended compositions, injection molding

60 Anniversary of Voronezh Branch of «NIISK»

Blinov E.V. (Director), Papkov V.N. (Ph. D. [Techn.], Deputy Director), Glukhovskoy V.S. (Prof., D. Sc. [Techn.], Chief of Lab), Greenfeld E.A. (Chief of Lab), Yudin V.P. (Ph. D. [Techn.], Lead. Res.)

History of establishment and development by Voronezh branch of Scientific-Research Institute of synthetic rubber by S.V. Lebedev, its successes and prospects are presented.

Key words: synthetic rubbers (styrene butadiene, methyl styrene butadiene, butadiene acrylonitrile), emulsion polymerization, latexes, radical polymerization initiators, emulsifiers, inhibitors, stoppers, antioxidants, antifoaming agents, initiators and cocatalysts of anionic polymerization, wastewater treatment, gas emissions.

Specific Features of Production of Extruded Rubber Profile for Aviation by Ultra-High Frequency Method (U.H.F.)

Shtyrbul S.V. (Postgrad. Stud.)

Short communication. Using as an example extruded rubber profiles produced from compound NO-68-1 NTA based on blend of BNK and polychloroprene the specific features of the ultra-high frequency vulcanization of aviation profiles are considered. NO-68-1 NTA is the rubber of high process ability and much studied properties. The best production parameters for these profiles are recommended: temperature 150 °С, power of each magnetron 600 wt, vulcanization time 2 min.

Key words: ultra-high frequency vulcanization, extruded rubber seals

International Elastomer Conference of Rubber Division of American Chemical Society

Yurovskaya I.S.

Review of the papers presented on International Elastomer Conference and 194th Technical Meeting of Rubber Division of American Chemical Society (09–11.10.18, Louisville, USA).

Key words: conference, review, innovations, simulation, EPDM, «optical» silicon rubbers, new synthetic polyisoprene, isoprene biopolymers, copolymer of acrylonitrile and chloroprene, fluorine rubber, new catalysts, usual and nanofillers (silica, carbon black, graphite, carbon tubes, graphene, modified aluminosilicate), Payne effect, bio-plasticizer, modification, cutting, aging, forecasting, ISO and ASTM, ISO TC45

«Interplastica 2019»: How Will Be Memorized 22-d Specialized Plastics and Rubber Exhibition

Post-release on Exhibition «Interplastica 2019», organized by «Messe Düsseldorf» and «Messe Düsseldorf Moscow». There is Exhibition «Upakovka 2019» tacked place simultaneously. (29.01 – 01.02.19, Expocenter, Moscow)

Key words: exhibitions, visitors, 3D-Print, modern equipment, innovations

Let Us to Sway the Demand

Post-release on 11-th Forum «Russian Polymers», «Russian Polymers 2018», organized by INVENTRA in support of CREON Capital and Exhibition «Interplastica 2018» (20.11.18, Moscow).

Key words: PP, PE, PVC, PC, PETP, block-copolymers, instability, methods of quality control, recycling, production capacity, competition, production and consumption dynamics, rise of prices, polymer raw materials, hidden part of demand, polymer products, tubes, films, packing, building, autocomponents, perfumery, nonwoven materials, market, import, export, import substitution, state role