Abstracts

№3, 2016

The Influence of Temperature on 1,3-Butadiene and Styrene Copolymerization Process Induced by Modified Initiated System Containing Lithium

Vagizov A.M., Khusainova G.R., Akhmetov I.G., Sakhabutdinov A.G.

PJSC «Nizhnekamskneftekhim», Nizhnekamsk

The influence of temperature (from 30 to 70 oC) on the 1,3-butadiene and styrene copolymerization process in hexane solvent in the presence of of n-butyllithium and amine-containing modifier (ACM) as initiation system was studied. The characteristics of micro- and macro- structure of S-SBR synthesized samples were determined. Introducing of ACM results in the disappearance of the induction period and the increase of copolymerization process rate. Thereby, in the presence of ACM the reactivity of styrene is increased, the decrease of the temperature just enhances this effect. However, the use of modifier provides the randomized distribution of vinylarene units and conjugated diene in polymer chain. The use of amine-containing modifier together with the decrease of the process temperature to 30oC are followed by the increase of 1,2-units weight fraction in butadiene part of copolymer to 66,3 %.

Key words: anionic polymerization, modifier ACM, solution SBR, random copolymer, vinyl units, process temperature

Electroconductivity of Thermoelastoplasts, Modified by Gaseous Fluorine

Petrova G.N., Rumyantseva T.V., Nazarov V.G., Sapego Yu.A.

Electroconductivity of TEP modified by gaseous fluorine have been studied. Samples of TEP based on polyether (polyurethane “Vitur”) and that of phosphorous-containing fireprproofing compound were conditioned in gaseous fluorine for 1 and 3 hours as well as treated by ethyl alcohol after conditioning. Surface morphology of modified samples was studied by ASM. The changes of morphology were shown to be similar to that for rubbers after surface fluorination. Specific volume and surface impedance were measured by apparatus Agilent 4339В (USA). In all cases specific volume impedance of modified TEP in two order of magnitude lower than that of initial TEP. Introduction of fireprproofing compound results in addition decrease of impedance: volume was 2,5 times and surface was 100 times lower than that of TEP without fireprproofing compound. The effect of fireprproofing compound is connected with it action similar to fillers and formation of thin film on the surface of TEP. Ethanol treatment results in decrease of specific volume impedance.

Key words: electroconductivity, specific volume impedance, specific surface impedance, fluorine, surface fluorination, surface morphology, ASM, Agilent 4339В

Hydrolyzates of Sulfur-Containing Polypeptides (Keratines) as a New Ingredients of Polymer Composite Materials

Kolotilin D.V., Potapov E.E., Reznichenko S.V., Ermilov V.V., Prut E.V., Volik V.G., Kovaleva A.N.,

Popov A.A., Mastalygina E.E., Polyakov V.S., Fedorova T.Yu.

The use of biologically active substances, such as hydrolysis products of keratin proteins of various structures appears to be the most rewarding way of development of new polymer composite materials. Possibility is sown to use keratin hydrolyzates as modifying additives for improvement of different properties of different elastomer composites. There are: cross-linking and vulcanization accelerators for composite materials based on synthetic polyisoprene; secondary curing agent of elastomer materials based on chlorinated rubber; vulcanization accelerators for composite materials based on polychloroprene; as biodegradable additives for biodestructive film polymer composites. The use of these compounds allows:

to eliminate environmentally dirty components from the materials; to eliminate ingredients obtained from non-renewable sources of raw materials; to solve a number of economic problems, including the import substitution; to obtain latex compositions with properties approaching the natural rubber latex.

Key words: hydrolyzates of keratin, amino acid, cystine, cysteine, polychloroprene, polyisoprene, antioxidant, biodegradation, polyethylene

Cobalt-nanomodified Shungite as a Promoter of Rubber/Steel Cord Adhesion

Salych E.G., Potapov E.E., Reznichenko S.V., Bobrov A.P., Smal V.A., Lyakin Y.I., Drobot D.V., Tokarev I.G.

Surface modified by cobalt cations samples of Shungite (Karelit) (Co–NMSH) were prepared. Samples of Co–NMSH of different amount of Со2+ (1–10 %) were in use and introduced in elastomer compounds based on SKI-3 and SBR. Increase of all effects known for nonmodified Shungite, including acceleration of sulfuric vulcanization and improvement of mechanical properties of rubbers is shown as well as possibility to eliminate ZnO from composition. Possible change of Zn2+ ions on Со2+ ones and its larger efficiency is supposed. Effect of Co–NMSH on adhesive properties of rubbers was specially studied. Better adhesion of rubber to steel cord is found for compounds, containing 2–5 rhp of Co–NMSH of 4–7 % Со2+ on Shungite surface. Effect of salt (8 h), vapor (96 h at 90 оС) and thermo oxidation (72 h at 100 оС) aging was also studied for model rubber based on SKI-3 of optimum Co–NMSH content with 5 % Со2+. 0,75 (for vapor one), 0,83 (for thermo oxidation one), and 0,91 % (for salt one) of rubber-to-cord bond strength is conserved at aging. So Co–NMSH is recommended as promoters of adhesion to metal surface.

Key words: cobalt modified Shungite, SKI-3, SBR, sulfuric vulcanization, mechanical properties, rubber/metal adhesion, promoter of rubber/metal adhesion, steel cord, rubber-to-cord bond strength, aging

Carbon Nanotubes in the Tire Rubbers. P.1. Study of the Effect of Carbon Nanotubes on the Properties of Breaker Rubber

Mukhtarov A.R., Mokhnatkin A.M., Dorozhkin V.P., Mokhnatkina E.G., Muradyan V.E., Batrshina R.R.

Processing and mechanical properties of raw and vulcanized breaker rubbers based on NR containing single-wall carbon nanotubes (SWCNT) have been studied. SWCNT was treated and introduced in raw rubber in composition containing carbon black (88,24%), SWCNT (9,8%), SKI-3 in solution (1,96%). The presence of –СООН groups on the surface of SWCNT after treatment was supported by IR spectroscopy. Increase of SWCNT content in rubber compound to 0,15 or 0,2 % results in increase of green strength by a factor of 1.6. Moony viscosity is also increased. Improvement of vulcanization properties was also shown. The changes of Payn effect are in evidence of the improvement of interaction between particles of carbon black. The use of small amount of treated SWCNT is shown to decrease of tgδ at 60 °С, as well as increase of tear resistance and adhesion to steel cord. However wear resistance became worse. Possibility to replacement of 30 rhp of NR in breaker rubber on synthetic polyisoprene SKI-3 at the use of SWCNT is shown.

Key words: carbon nanotubes, NR, breaker rubbers, green strength, viscosity of the rubber, tear resistance, processing properties, dynamic properties, adhesion to steel cord

Carbon Nanotubes in the Tire Rubbers.

P.2. Study of the Effect of Nanotubes on the Properties of Tread Rubber, Filled with Carbon Black.

Mukhtarov A.R., Mokhnatkin A.M., Dorozhkin V.P., Mokhnatkina E.G., Muradyan V.E., Batrshina R.R.

Processing and mechanical properties of raw and vulcanized tread rubbers based on blends of two types SBR and filled with carbon black containing single-wall carbon nanotubes (SWCNT) have been studied. Three types of rubber compositions were prepared: one of untreated SWCNT with stearic acid and two of SWCNT of different treatment. Comparison of properties of these compositions is presented. Introduction of SWCNT in all cases results in increase of green strength and improvement of vulcanization properties and increase Moony viscosity of raw rubber as well as dynamic properties of vulcanized rubber, Payn effect is increased. Wear resistance also became better, especially in the case of untreated SWCNT with stearic acid, providing –СООН groups.

Key words: carbon nanotubes, SBR, tread rubbers, carbon black, green strength, viscosity of the rubber, processing properties, dynamic properties, wear resistance, service properties

Carbon Nanotubes in the Tire Rubbers.

P.3. Study of the Effect of Nanotubes on the Properties of Tread Rubber, Filled with Silica

Batrshina R.R., Mokhnatkin A.M., Dorozhkin V.P., Mokhnatkina E.G., Muradyan V.E., Mukhtarov A.R.

Processing and mechanical properties of raw and vulcanized tread rubbers based on blends of SBR and Polybutadiene with addition of NR filled with silica, containing one-play carbon nanotubes (SWCNT) have been studied. Two types of rubber compositions were prepared: one of untreated SWCNT with stearic acid, providing –СООН groups, and the other, of treated SWCNT. Comparison of properties of these compositions is presented. Introduction of SWCNT in both cases results in increase of green strength and improvement of vulcanization properties and increase Moony viscosity of raw rubbers. In contrast with tread rubber, filled with carbon black, Payn effect of silica filled one is increased. Dynamic and other mechanical properties of vulcanized rubbers changed of different ways at introduction of SWCNT. Wear resistance as well as other service properties became better.

Key words: carbon nanotubes, SBR, PB, NR, tread rubbers, silica, green strength, viscosity of the rubber, processing properties, dynamic properties, wear resistance, service properties

Promising Methods of Activation of Rubber Crumb

Kablov V.F., Perfil’ev A.V., Shabanova V.P.

Methods of surface activation of crumb rubber by different physico-chemical effects were considered. Analysis of the properties of commercially available activated rubber crumb and prospects of its application in various polymer compounds is presented. The influence of the degree and depth of the devulcanization of the surface layer of crumb rubber on the rheological and mechanical properties of polymer compositions is shown. Promising areas of current research in the field of activation of the rubber crumb surface are described. It is shown that the use of microwave energy to activate the rubber crumb just before the manufacturing allows to obtain goods of improved properties.

Key words: crumb rubber, rubber powder, modification, surface activation, the products of utilization of tires, surface devulcanization, microwave energy

Nanodisperse Carbon-based Medical and Veterinary Sorbents: from Idea of Creation to the Practical Application

P’yanova L.G.

Review devoted to the history of creation of carbon sorbents for medical and veterinary use based on nanodisperse carbon black, processing of their preparation and new ways of synthesis of modified carbon sorbents developed at the Institute of Hydrocarbons Processing SB RAS.

Keywords: nanodisperse carbon, carbon sorbents, processing, medical and veterinary materials

IX International Scientific-Practice Conference «The Current State and Prospects of Petrochemistry Innovative Development»

Akhsanova O.L., Gatiyatullina L.Ya., Akhmetov I.G.

PJSC «Nizhnekamskneftekhim», Nizhnekamsk

Review of papers presented at Conference “The Current State and Prospects of Petrochemistry Innovative Development” (Nizhnekamsk, 05 – 07.04.16)

Key words: conference, petrochemistry, innovation, rubber, tires, modification, catalysts

Elastomers 2016: Tradition and Innovations. VI Conference in CEK «Expocenter», Moscow

Reznichenko S.V., Morozov Yu.L., Konikova T.B.

Report on 19th International Exhibition «Tire, RTG and Rubber-2016» (Moscow, Expocenter, 18 –21.04.16) and detail review of papers presented on the VI Conference «Elastomers 2016:Tradition and Innovations» (Moscow, Expocenter, 19–20.04.16)

Key words: exhibition, conference, rubber industry, rubber science, innovations, rubber, TEP, adhesives, rubber goods, tires, fillers, processing oils, other ingredients

Italy and USSR, Collaboration in the Field of Synthetic Rubber (Memories of the Veteran)

Allari J. Director on R&D of company ANIC (1955-1984), Italy

Description of the history of the rise and progress of the collaboration between Italy and USSR, in the field of synthetic and natural isoprene rubber, written by the member and responsible person of this process.

Key words: company ANIC, R&D, synthetic PI, NR, R&D, rubber production, rubber properties, Ministry of Petrochemical Industry, Scientific Institutes