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Section 6. Chemistry
DOI: http://dx.doi.org/10.20534/AJT-17-3.4-27-31
Amirov Fariz Ali,
head of the Department "Orgonicheskih substances and NAVAL technology "
The Azerbaijani Oil Industry and Booked E-mail: [email protected] Shikhaliyev Kerem Seyfi, Professor of the Azerbaijan Oil Industry and Booked.
E-mail: [email protected]
Obtaining and application of rubber mixtures based on isoprene (sri-3) and functional group polymers
Abstract: Various compositions have been obtained on the basis of polymer mixtures and their physic-chemical properties heat and ozone durability, cords and dynamic characteristics of bond strength with metals have been learned. Influence of various groups on compositions properties has been clarified.
Keywords: ethylene, propylene, composition, high molecular composition, chemical modification, mechanico-chemical modification, modification of polymers during treatment.
As a result of investigations influence of various fac- with the solution of ecological and practical problems.
tors on the interaction of rubbers with functional group polymers has been studied. It has been shown that interaction between rubber and functional group polymers is more effective at 120-180 °C temperature interval. This efficiency has been studied by the change of viscosity and it has been shown that various functional group polymers influence on effective viscosity change of EAS.
It has been determined that physico-mechanical properties of vulcanizates of compositions having high effective viscosity are higher.
Practical significance of the carried out investigation is that on the basis of heat durable EAS and other rubbers-butadiene styrol (BSR), isoprene (SRI-3), butyl rubber (BR) mixtures, rubber mixtures (compositions) be used in modern synthesis industry have been obtained.
Carreed out investigations showed that at present suggested compositions are used in the industry. Rubber mixtures in comparison with SRI-3 and butadiene styrol rubbers have the properties more resistant to heat, aging and durable to multi deformation, tear.
Modification of high molecule compounds with various methods is one of the main directions in purposeful change of known polymer materials properties [1-3]. It is connected with that industrial or small volume production of polymers having new property is connected
As a result of study of physics and chemistry of polymer mixtures it is possible to obtain compositions with high physico-mechanical property on the basis of functioanal group polymers [4-9].
1. SREPT-60, SREPT-40-ethylene-propylene. Third monomer-dithiclopentadien;% mass 2,5-3.
Unsaturation,% mol - 1,5-1,9
Viscosity according to Muni-40 and 60
2. SRI-isoprene rubber;
3. KP-50 chloroprene rubber;
4. BK-2045 T-butyl rubber
Unsaturation,% mol-2,0 ± 0,2
Viscosity according to Muni-45 and 55
5. PVC-E6250]-polyvinylchloride
Chtorine quantity, % mass 62 ^ 65
6. CAPP-chlorated atactic polypropylene chlorine quantity, % mass 50,7
Decomposition keeping temperature, °C - 142
7. SCAPP-sulphachlorated atactic polypropylene (synthesized in the laboratory)
Chlorine quantity, % mass-35
Sulphur quantity, % mass-0,75
Molecule mass-1400
Following plasticifators have been used in the composition preparing:
DBF-Dibutylftalat
MQF-9-oligoetheracrelate
Sulfanol;
Density, g/sm 3 - 0,870 Quantity of active substances,% - 47.5 Quantity of chlorine in the mixture of functional group polymers and other rubbers has been determined using Sheninger method [5-6].
IR spectrums of polymer mixtures and compositions have been taken at HR-20 IR spectro-photometr in 400-4000 sm-1 area.
Determination of physico-mechanical properties ofvulcanizates has been carried out according to the stan-darts. Preparation of samples has been carried out in the laboratory condition within 12 minutes at 90 °C temperature. The obtained compositions after heating at 153 °C within 30 minutes, under 6 Mpa pressure, have been extracted with dichlorethane within 72 hours to be purified from modificated composition chlorine compounds.
Extracted samples have been dried till the free weight under 50-60 °C vacuum. Thermal stability of initial polymers and polymer mixture, have been studied at 10 °C/min temperature change rate, at 400 °C heating regime, and atmosphere air in dynamic condition in Kurnaov pirometer and «Paulic-Paulic Erdey» derivatograh system by differencial thermal and thermogravimetric method.
Role of functional group polymers-PVC, CCPE, SREPT-40, in the mixtures saturated by synthetic iso-prene rubber has been learned to analyse properties of rubbers based on saturated rubbers with functional group polymers.
Functional group polymers mixture substituting main polymer has been introduced in 2.5.-3.0. mass quantity. 100 mass SRI, 1.0-stearicacid, 5.0 zink oxide, 0.6. altax, 3.0. - diphenyldiguandin, 1.0 mass sulfur have been added into the mixture.
Homogenous composition mixture has been vul-canizated at 133 °C within 33 minutes at the laboratory condition. Physico-chemical properties of the obtained vulcanizate have been determined and the results have been given in table 1. As it is seen from the table functional group polymers improve thermal durability of vulcanizates and their relation with metal.
Dynamic properties ofvulcanizate worsen when the quantity of PVC in the mixture increases from 2.5 to 20 mass.
That is why it is recommended to introduct only 2,5 ^ 5,5 mass PVC into the mixture.
Introduction of CCPE into the mixture till 30 mass increases fatigue resistance of vulcanizates in repeated formation.
Table 1.
Names Content of mixtures,
1 2 3 4 5 6 7
SRI-3 9 97.5 95 99 95 99 95
CAPP 1.0 2.5 5 - - - -
CCAPP - - - 1.0 5.0 - -
SCAPP - - - - - 1.0 5.0
Properties of vulcanizate
Indices Properties of vulcanizate
1 2 3 4 5 6 7
Strength level in violation, MPa 24.4 19.7 15.3 22.1 15.8 21.7 15.0
Conditional tension in 300% elongation, MPa 0.96 0.92 0.63 0.90 0.65 0.87 0.67
Conditional tension in 500% elongation, MPa 1.81 1.70 1.31 1.79 1.25 1.81 1.27
Relative elongation,% 900 870 840 880 900 870 890
Relative residue deformation,% 9.1 9.0 10.2 8.5 8.0 9.0 8.5
Violation resistance, 38.0 35.1 27.0 40.0 28.0 38.5 31.5
Elasticity,% 70.0 68.0 61.5 68.0 62.0 69.0 63.0
Conditional solidity unit on TM-2 35.0 32.0 27.6 35.0 31.0 35.0 30.0
Heat aging coefficient at 100 °C within 72 hours 0.93 0.91 0.87 0.94 0.91 0.92 0.90
Relation stability of rubber with metal, MPa 1.13 1.19 1.21 1.09 1.45 1.02 1.35
Mixture content- mass stearic acid-1.0; neozon brax-5.0; modificator-Pv-1-1.5; captax-2.0; sulfenamid. D-1.0; santolex Up-0.5; N-nitrozodifenylamine-0.7; ru- TC-1,2; microfoste-2.0; technical carbon-P-514-45.
Mixture plasticity changes at 0.59-0.64 interval. creases cohesion ability of these mixtures. Analysis has Adding SREPT-40 and SREPT-60 into the mixtures been shown that SREPT quantity in this mixture must based on SRI-3 rubber and functional group polymers in- be 5* mass.
Table 2. - Physico-mechanical properties of vulcanizates of SPI based rubber mixtures
Names Mixture content *
1 2 3 4 5
SRI-3 85 85 85 85 85
SREPT 10 10 10 10 10
CCPE 5 5 - - -
PVC - - 2.5 5 5
PH-6 § oil 0.45 0.45 0.45 0.45 0.45
thiuran 2.0 2.0 2.0 2.0 2.0
sulfur 2.0 2.0 2.0 2.0 2.0
With this purpose rubber based on SRI-3 and SREPT has been prepared and physico-mechanical properties of the mixture vulcanizate have been learned.
SRI-3 rubber is added beforehand prepared SREPT mixture. The quantity of sulfur and thiuran in the mixture has been adjusted and as a result of carried out stud-
Table 3. - Physico-mechar
ies introduction of SREPT into the mixture in 2.0 and 0.45 mass was more efficient.
Prepared mixture has been vulcanizated at 155 cC temperature within 15 minutes. Obtained results have been given in tables 2,3 and 4.
al properties of vulcanizate
Indices Properties of vulcanizates
Violation strength level, MPa 19.3 18.1 19.7 20.3 18.0
Conditional tension in 100% elongation, MPa 3.4 3.1 3.2 3.4 3.2
Conditional tension in 300% elongation, MPa 10.5 10.0 10.8 11.2 10.5
Relative elongation,% 470 500 540 520 480
Relative residue deformation, % 67.5 65.0 63.5 62.8 60.0
Elasticity, % 41 40 44 45 42
Conditional solidity unit on TM-2 62 60 61 62 61
Heat aging coefficient at 100 °C temperature, within 72 hours 0.60 0.61 0.62 0.61 0.58
Relation stability with cord. (H-method) *10-2
Cord 17 B
23 °C 6.7 6.3 8.6 8.0 7.9
100 °C 6.1 5.9 8.0 8.4 6.4
120 °C 5.2 7.3 7.3 7.6 5.1
Cord 22 B
23 °C 4.4 4.0 6.4 6.7 5.9
100 °C 3.5 3.2 5.9 6.2 5.7
120 °C 2.8 2.9 5.2 5.4 4.8
Some properties of the vulcanizates obtained on the base of SRI-3, SREPT, PVC are superior than production rubbers-solidity in violation, heat aging, relation stability with 17 B and 22 B cords and elc.
Use of 2.5 * 5.0 mass quantity PVC in testing rubbers showed that physico-chemical properties of these rubbers including relation stability are more superior in SRI-3, SRMS-3, BMSR-25 than in the main rubbers.
It has been shown that rubbers based on 85 * 87.5 mass SRI-3; 10 SREPT and 2.5*5.0 mass PVS can be offered for tyre production.
Generalization of the obtained results show that according to repeated deformation fatigue, tension fluence: CCPP; CCaPP, - CAPP, CCPE-PVC.
According to the relation slability with metal (Ct-3) functional polymers have the following sequence.
Table 4. - Recipe of test rubbers prepared on the basis of rubbers and properties of their vulcanizates
Name Content of mixtures, mass
SRI-3 70 85 85.5 87 85 85
SRI-3 APKM-15 30 - - - - -
SRERT-60 1.0 5 - - - -
CCPE - 10 10 10 10 10
PVC - - - 2.5 5 5
ПН-6Ш oil 4.0 - 4.0 - - 4.0
tiuran - 0.45 0.45 85 0.45 0.45
sulfur 2.2 2.0 2.0 2.0 2.0 2.0
Main indices of vulcanizates
Violation strength level, MPa 21.1 19.6 18.7 19.9 20.1 18.2
Conditional tension in 100% elongation, MPa 2.5 3.6 3.4 3.1 3.3 3.3
Conditional tension in 300% elongation, MPa 9.2 10.9 10.2 11.0 11.6 14.0
Relative elongation,% 550 430 460 520 520 460
Relative residue deformation,% 26 19.5 19.0 19.0 20.0 18.0
Elasticity,% 43 42 41.5 46 47 40
Conditional solidity unit on TM-2 60 63 61.5 61 60 62
Heat aging coefficient at 100 °C temperature, within 72 hours 0.46 0.60 0.60 0.61 0.59 0.59
Relation stability with cord. (H-method) *10-2
Cord 17 B
23 °C 4.1 6.8 8.8 9.3 9.3 8.1
100 °C 3.6 6.2 5.7 7.6 8.8 6.5
120 °C 3.5 5.1 4.6 7.0 8.0 5.0
Cord 22 B
23 °C 3.5 4.2 4.0 6.5 6.9 6.2
100 °C 2.9 3.4 3.2 6.0 6.4 5.8
120 °C 2.5 2.6 8.4 5.7 5.3 4.4
PVC-CCPE-CAPP-CCAPP, - CCPP According to vulcanizate heat durability: PVC-CCPE-CCPP-CSAPP According to the violation resistance functional polymers have the following sequence:
The results of the carried out scientific researches show that it is necessary to have general interphase relation to obtain rubbers with high physico-mechanical properties but the structure of the hetogenous vulcanization net is not important.
To improve interphase relation various additives have been added into polymer mixtures.
When in SRI-3, CAPP, CCAPP and SCAPP mixtures, the quantity of CAPP, CCAPP and SCAPP is 1.0 mass then the physico-mechanical properties of vulcanizates are good. Increase of relation stability of metal with the mixtures with 1+5 mass CAPP, CCAPP and SCAPP is explained by the increase of mixture functionality.
It is recommended to add SREPT-40 and SREPT-60 elastomers to the mixtures based on CRI-3 rubber and functional group polymers to increase corrosion ability of these mixtures.
References:
1. Main problems of the mechanics of composition polymer materials. Review-Plastic masses - No. 10, - 2002, - P. 3-4.
2. Shikhaliyev K. S., Movlayev I. G. Analysis of CKH-40 influence on rheological properties of PVC compositions. Journal Chemistry - No. 1, - Baku, - 2009. - P. 188-190.
3. Salimova N. A., Shikhaliyev K. S., Abdullayeva M. Y.-Plastification polyvinylchloride by benzylnaphtenate ether obtained from Baku oil. Science and World, - Volgograd, - 2014, - Vol. 1, - No. 5 (9), - P. 132-134.
Research of the influence of the modified carbon on the properties of rubber compounds
4. Polymer mixtures. Nod V. Newmenas S., - Moscow. Minplasts, - P. 407.
5. Askadski A. A. Polymer deformation - Moscow, Chemistry, - 1973, - P. 448.
6. Rafikov S. R., Budtov V. L., Monakov Y. B., Introduction to physico-chemistry of polymer solutions. M. Nauka, -1978. - P 328.
7. Bilalov Y. M., Mamedov F. V. and et al. Compositions based on mixtures of elastomers and polymers containing various functional groups. Materials of the conference on Rubbers, - 1998, - No. 3,9. - 9-13.
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DOI: http://dx.doi.org/10.20534/AJT-17-3.4-31-35
Akhmedova Aziza Akmalovna, Tashkent chemical-technological institute, assistant Axmadjonov Sardorbek Axmadjonovich, Tashkent chemical-technological institute, Bachelor-student Teshabaeva Elmira Ubaydullaevna, Tashkent chemical-technological institute, Head of department "Technology of Higher molecular compounds and Plastics"
Hamrokulov Gofurjon, Tashkent chemical-technological institute, professor
Ibadullaev Akhmadjon, Tashkent chemical-technological institute, professor E-mail: [email protected]
Research of the influence of the modified carbon on the properties of rubber compounds
Abstract: The modified carbon is characterized by its difference of chemical compositions from known brands of low structural technical carbons, T 900, T 701, T 705, P 803, namely, with the increased maintenance of oxygen and hydrogen. Study of extraction products of modified carbon testifies to the presence of organic compounds, finish on a surface of carbon particles to 12 %. The element composition has been determined: carbon-92,11%, hydrogen-5,70% and oxygen-2,19 of %. Gross formula of extract is C54 H40 O. Average number molecular weight according to the gel-chromatography makes ~700. Introduction of the modified carbon in composition of rubber compounds reinforces interphase interacting on boundary line «rubber-fillers» and formations of additional bonds between macromolecules of rubber and functional groups of oligomer, as a result, complex enhancement of properties of compositions is observed.
Keywords: carbon, properties, compositions, rubber compounds, elastomeric, plastic, elastic, structure.
Introduction. One of effective ways of improvement of properties of rubber compounds is application of new fillers different from structure and properties to which number refer to the modified carbon. Earlier [1] it has been shown that the modified carbon can be used in the capacity of filler by the manufacture of elastomeric compositions. Physical and chemical properties of modified carbon: specific conditional surface-19-24 m 2/g, specific adsorption surface on nitrogen (method BET) - 85-90m 2/g, Iodic number - 100-110 of mg/f, Absorption of dibutylphthal-ate - 170-180 ml/100 g, pH water suspension-6-8. Ele-
ment composition: carbon-88-90%, hydrogen-3-4%, oxygen-6-7. Ash content - 0.8%. Apparent density-156 g/1000 sm 3. Average diameter of particles - 45-70 of nm.
Research objects and methods. The influence of the modified carbon, which is a secondary material of the manufacture of acetylene, on technological properties of rubber compounds on the basis of caoutchoucs SRI-3 and nairite KP-50 has been investigated. Investigated rubber stocks was contained modified carbon from 10 to 60 mass f. on 100 mass f.of caoutchoucs. For comparison the mixes loaded with technical carbon P 803 were taken.
