Abstracts

№5, 2018

Silanization of Tread Rubber Compounds of Passenger Tires. P.5. Physical and Mechanical Properties of Tread Rubber

Dorozhkin V.P. (Prof., D.Sc. [Chem.]), Salaev M.V. (Postgrad. Stud.), Mokhnatkin A.M. (Ph.D. [Techn.], Head of Dep.), Mokhnatkina E.G. (Ph.D. [Techn.], Assist. Prof.), Makhotin A.A. (Director), Prinada A.L. (Director)

The effect of the silanization conditions on the physical and mechanical properties of a tread rubber of passenger tires has been studied. Similar dependence of rebound resilience (R) and the hardness (H) of the tread rubber on the conditions of silanization: temperature (T), time (t) and content of silanizing agent TESPT (C) was found. R increases under the rise of the temperature of a tread rubber (with a coefficient of 1,33, which is very close to the growth temperature coefficient of 1,26 under increase of temperature from 296 K to 373 K) and H decreases. Recurrence equations connected R, H, abrasion (A), dynamic life Np , heat formation (G) and generalized wish-factor D F-M with parameters х1, х2, х3, presented Т, t and С correspondingly. Under decrease of t from 235 to 35 s the value of A is reduced on 6 %. Effects of T and C are more complex and significant. For instance, minimum A and maximum Np are shown to be at minimum T (115 ºС) and maximum t (235 s) and lowest С (4,0 phr).

Key words: silanization conditions, physical and mechanical properties of tread rubber

Silanization of Tread Rubber Compounds of Passenger Tires. P.6. Operating Properties

Dorozhkin V.P. (Prof., D.Sc. [Chem.]), Salaev M.V. (Postgrad. Stud.), Mokhnatkin A.M. (Ph.D. [Techn.], Head of Dep.), Mokhnatkina E.G. (Ph.D. [Techn.], Assist. Prof.), Makhotin A.A. (Director), Prinada A.L. (Director)

The effect of silanization conditions of tread rubber compounds on the performance characteristics of a tread rubber of passenger tires has been studied. The properties directly connected with operating ones are: coefficient of heat aging, wear resistance, tgδ60, tests, imitating wet road grip of tire and braking distance on wet road, calculated friction coefficient on wet asphalt, and generalized wish-factor D F-M. It was found that the greatest resistance to thermal aging and wear has a tread rubber, obtained from a rubber mixture with a minimum temperature (115 °C), time silanization (35 s) and TESPT dosage (4,0 mass.h.). Under these silanization conditions the minimum of tgδ60 (0,121) is obtained; i.e. minimum fuel consumption is in need to overcome rolling resistance of tires. The values of characteristics connected with wet road grip of treat tire and their ratings also tend to improve by reducing temperature, time of silanization and TESPT dosage.

Key words: silanization conditions, performance properties of tire tread rubber connected with operating tire properties

Effect of Modified Kaolin Microfiber on the Properties of Fire-Heat-Protective Elastomer Materials

Kablov V.F. (Prof., D.Sc. [Techn.]), Novopoltseva O.M. (Prof., D.Sc. [Techn.]), Keibal N. A. (D.Sc. [Techn.], Head of Chair), Kochetkov V. G. (Ph.D. [Techn.], Senior Lecturer), Kryukova D. A. (Postgrad. Student, engineer), Gordeeva E. V. (master), Egorova S. A. (Master)

Effect of modified intumescent aluminosilicate microfiber filler – kaolin microfiber (KMF) on fire-heat-protective (FHP) properties of vulcanizates based on ethylene-propylene-diene rubber EPDM-40 has been studied. Composites contained from 3 to 15 wt. phr of KMF, of fractional composition from 25 to 110 mcm and a fiber diameter of about 10 mcm. As modifiers phosphorusboroncontaining oligomer, contributing to increase FHP and multifunctional additive – hexachlor-p-xylene were in use. Increas of FHP under high-temperature impact as a result of modification of KMF is established: decrease of the rate of linear burning by 14 %, increase of cokes layer (KL) formation. Increase of KL separation by 10–15 %, start time of ignition by 20–40 % and start time of the separation of KL by 30 % under erosion entrainment are also shown.

Key words: ethylene-propylene-diene rubber, fillers, kaolin microfiber, modifier, fire-heat-protective properties

Experimental Investigation of the Dependence of Friction Coefficient on Load and Sliding Velocity for Tire Tread Compound Using in the All-Steel Radial Ttire

Morozov A.V. (Ph.D. [Techn.], Sen. Res.)

The experimental results of the estimation of the coefficient of friction (µ) for the tread tire compound sliding against a rough surface was present. The rough surface in the experiments was simulated by sandpaper. UMT-2 (CETR, Inc.) tribometer with scheme of contact rubber ring – flat disc was used. Experiments were carried out in the range of sliding velocities (V) from 0,1 to 200 mm/s, bulk temperatures from –25 to 100 °C and normal pressure (P) from 0,1 to 0,4 MPa. The obtained experimental data was transformed by the method of temperature-velocity superposition (so-called method of master curve construction) and presented in the form of friction maps. The friction map is dependence of the coefficient of friction (µ) on P, V and Т. The shift factor (lgαT) on the generalized axis of the temperature and velocity was determined empirically on dynamometrical analyzer (DMA+ 1000, METRAVIB) at constant amplitude of deformation equal 0,1% in the frequency range 1–125 Hz and temperatures –50–120 °C. The dependences of µ on V in the range from 0,1 to 50 m/s were obtained on the basis of the constructed friction maps at a fixed value of P. In paper presents the results for the driving wheel operating in different temperature conditions.

Key words: tire tread, rubber friction, coefficient of friction, temperature-velocity superposition, master curve, friction map

Study of the Performance of Epichlorohydrin Rubber-Based Elastomers in the Hydrocarbon Environment under the Cold Climate

Mukhin V.V. (postgraduate student), Petrova N.N. (D.Sc. [Chem.], Prof-Chief of Department), Maskalyunaite O.E. (Deputy Head of Lab.)

In this article we investigated the efficiency of model elastomer based on GECO epichlorohydrin rubber Hydrin T6000 (Zeon) in the hydrocarbon medium (Talakan oil), under climatic conditions of the Republic of Sakha (Yakutia). The samples were exposed in an unheated storehouse of the climatic testing area of NEFU. Hydrin T6000 is a copolymer of epichlorohydrin, propylene oxide and allyl glycidyl ether with glass transition temperature Тg= –60 °С. Simultaneously for comparison model elastomers based on SKN-26 and its blends with SKN-16 were exposed and tested. During the exposure time (1 year) tensile strength, elongation, compression set, and swelling degree for all investigated rubbers were periodically measured. These parameters do not go beyond the standard values for sealing rubbers with exception of coefficient of elastic recovery after compression (КV). After first months of exposure at –30 and –50 °С the values of КV of elastomers based on butadiene nitrile rubbers reduced by 5–67 % due to diffusion processes at rubbers/oil contact. The Hydrin T6000 based rubbers under these conditions retained their low temperature properties (КV = 0,6–0,7), because their frost resistance associated with high flexibility of polymer matrix and not determined by presence of plasticizers. Hydrin T6000 based rubbers can be recommended for use as the basis of rubber to produce sealing parts with increased reliability for operation in cold climates.

Keywords: epichlorohydrin rubber, nitrile butadiene rubber, low temperature properties, aggressive resistance, climatic aging, full-scale environmental tests

Study of the Influence of Low-Volatile and Non-Toxic Phenolic Antioxidants on Physical and Mechanical Properties of Rubbers Based on BNR

Sokolova M.D. (D. Sc. [Techn.], Acting Director), Fedorova A.F. (Ph.D.[Techn.], Lead. Res.), Davydova M.L. (Ph.D.[Techn.], Sen. Res.), Krysin A.P. (D.Sc. [Chem.], Lead. Res.), Shults E.E. (Prof., D. Sc. [Chem.], Chief of Lab.), Khaldeeva A.R. (Jun.Res.)

The influence of low volatility, non-toxic, polyfunctionalized phenolic antioxidant additives (AA) on the physical and mechanical properties of the rubber based on the BNR (BNKS-18) has been studied. AA were added in the content of 0,5 wt % of the composition. Antioxidants were developed at the N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry of Siberian Branch of the Russian Academy of Sciences. Samples of stabilized elastomers were “aged” for six months under three different mediums: 1) under open air in Yakutia region; 2) under the aggressive hydrocarbon environment of Talakan oil (O); 3) under a hydraulic fluid of grade I-50A (HF). Experiments 2) and 3) were carried out in an unheated room. Initial data for tensile strength fр and breaking elongation εр as well as data obtained under 1, 3 and 5 month of exposition in all tree environment conditions are presented. Recommendation based on these data about the effectivenes of different AA for rubber technical goods working under different mediums are: sulfide СО–3, disulfide СО-4, and the phthalic acid ester Stafen under the open air; СО-3 under O; CO-4 under HF. Significant decrease of fр in O in comparison with HF is a result of rubber swelling in this medium. Properties of AA are compared with that of wide used in industry amine type stabilizer 6PPD.

Key words: BNR, stabilizers, antioxidants, climate stability, cold climate

Modern Trends in the Evolution of Rubber Recipes

Kablov V.F. (Prof., D.Sc. [Techn.])

Review and analysis of the present state of art of rubber compounding, and the line of development of modern materials in tire and technical rubber industry.

Key words: rubber, elastomer materials, raw rubber, fillers, modifiers, processing aids, nanotechnology, biotechnology, information technology

Radio Frequency Identification Technology (RFID-Tag) of Tire

Dong Lanfei (Sen. Spec.)

MESNAC Co.Ltd, mengxc@mesnac.com

Radio frequency identification technology (RFID) is in use in different technical fields and is of fast scanning speed, penetrable scanning, strong durability, and multiple information writing. RFID of tire is presented. Automatic equipment of production and introduction of RFID-tag in tire is developed. Management scheme of producing, storage, sales, use and retread of tires of RFID-tag is also presented. The standardization process of RFID tire tag is considered. The application of RFID technology on tires realizes automation management and traceability of the whole life cycle of tires, and brings a brand-new management mode to tire industry.

Key words: tires, RFID tire, automation equipment, standard

Results of Exhibition «Interplastic Kazan 2018»

Post-release

4-th International Specialized Exhibition «Interplastic Kazan 2018» (Exhibition Center Kazan Fair, 4–6.09.18), by organized «Messe-Duesseldorf Moscow», was held as a part of Tatarstan Petrogaschemical Forum (TPF) under support of President of Tatarstan. Simultaneously three other specialized exhibitions were the parts of TPF: 25-th International Specialized Exhibition «Petroleum, Gas, Petrochemistry»; 14-th Specialized Exhibition «Ecotechnology and Equipment of XXI century», 8-th Specialized Exhibition «GEO- Kazan: Geological Exploration. Geodesy. Cartography». 170 exhibitors from Russia, Byelorussia, the Nederland’s, and Azerbaijan tacked part in the Exhibition; there are 9000 gests.

Key words: exhibition, plastic, rubber, technology, processing, equipment, modernization, raw materials, plastic and rubber goods, polymer packing, road building, agriculture, energetic, alternative energy sources, training, polymer market

Composite World

Post-release on the Conference «Composites and Compounds»

Post-release on the 6th International Conference «Composites and Compounds» organized by INVENTRA, CREON group (13.09.17, Moscow) under support of CREON Сapital and International Specialized Exhibition «Interplastic 2018».

Key words: carbon fibers, fabric, nonwoven materials, boron fibers, glass fibers, thermoplastic compositions, resins, building, aviation, ship building, electrical engineering, highway and railway infrastructure, wind generators, certification