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CHEMICAL ENGINEERING
DOI - 10.32743/UniTech.2024.122.5.1752 7
GOST THE RESULTS OF OLEIN-PALMITINE RAW MATERIALS DEMAND BASED LEARNING
Alisher Akhmedov
Scientific researcher
Tashkent Scientific Research Institute of Chemical Technology,
Uzbekistan, Tashkent E-mail: alishbest19891991 @bk. ru
Masud Karimov
DSc, professor
Tashkent Scientific Research Institute of Chemical Technology
Uzbekistan, Tashkent E-mail: [email protected]
Abdulakhat Jalilov
DSc, academic
Tashkent Scientific Research Institute of Chemical Technology
Uzbekistan, Tashkent E-mail: a. [email protected]
ГОСТ РЕЗУЛЬТАТЫ ОЛЕИН-ПАЛЬМИТИНОВОГО СЫРЬЯ ОБУЧЕНИЕ НА ОСНОВЕ ТРЕБОВАНИЯ
Ахмедов Алишер Хидирович
научный исследователь, Ташкентский научно-исследовательский химико-технологический институт Республика Узбекистан, г. Ташкент
Каримов Масъуд Убайдулла угли
DSc, профессор, Ташкентский научно-исследовательский химико-технологический институт, Республика Узбекистан, г. Ташкент
Джалилов Абдулахат Туропович
DSc, академик, Ташкентский научно-исследовательский химико-технологический институт Республика Узбекистан, г. Ташкент
ABSTRACT
The article analyzes the methods of processing and modification of polymer materials. The main goals in modifying the properties and systems of materials are defined. Increases in the production of additives are analyzed and their inclusion in the composition of rubber mixtures of plastics is shown. The plasticization method was mainly used to increase the elasticity and cold resistance of polymers and to facilitate processing technological processes. The results of the experiment obtained in cooperation between the Tashkent Scientific Research Institute of Chemical Technology and the "Birinchi rezinotexnika Zavodi" LLC enterprise are presented. According to the obtained results, it is known that the physico-mechanical properties of the rubber mixture and the vulcanization process are changed by modification.
АННОТАЦИЯ
В статье анализируются методы переработки и модификации полимерных материалов. Определены основные цели модификации свойств и систем материалов. Проанализировано увеличение производства присадок и показано их включение в состав резиновых смесей пластмасс. Метод пластификации в основном использовался для повышения эластичности и хладостойкости полимеров, а также для облегчения технологических процессов
Библиографическое описание: Akhmedov A., Karimov M.U., Jalilov A.T. GOST THE RESULTS OF OLEIN-PAL-MITINE RAW MATERIALS DEMAND BASED LEARNING // Universum: технические науки : электрон. научн. журн. 2024. 5(122). URL: https://7universum.com/ru/tech/archive/item/17527
A UNIVERSUM:
№ 5 (122)_А ТЕХНИЧЕСКИЕ НАУКИ_май. 2024 г.
переработки. Представлены результаты эксперимента, полученные при сотрудничестве Ташкентского научно -исследовательского химико-технологического института и предприятия ООО «Birinchi rezinotexnika Zavodi». По полученным результатам известно, что при модификации изменяются физико-механические свойства резиновой смеси и процесс вулканизации.
Keywords: polymer resin mixture, plasticizers, fillers, stearic acid, olein-palmitin, quality indicators. Ключевые слова: смесь полимерных смол, пластификаторы, наполнители, стеариновая кислота, олеин-пальмитин, показатели качества.
Introduction. Facilitating the processing of polymer materials, modifying their properties and systems, making them strong, in order to obtain high-quality, durable and competitive products various chemical additives are included in its composition. Additions (plasticizers, fillers, stabilizers, dyes and other substances) production is increasing year by year. If 1980 4 thousand tons of additives were produced in 2017 arrived, and their amount was 8500 tons. 20 of them There are many types, most of which are poisonous. All of them included in plastics. These are polymer types and allows to increase the assortment [1-2].
One of the main methods of modifying the polymer system is a method of plasticizing them. From plasticiza-tion the main purpose is to incorporate various liquids or solids into the polymer the elasticity of the material and coldness with the introduction of substances increasing
Basic physical and chemical
durability and processing technological processes is to achieve facilitation [3-4].
In cooperation with the Tashkent Research Institute of Chemical Technology and "Birinchi rezinotexnika Zavodi" LLC, the olein-palmitin mixture, which is considered a local raw material as a substitute for imports, is used to improve the physical and mechanical properties of rubber equipment, resistance to various external influences, wear and tear, and to reduce its cost. scientific-practical work was carried out on the use of imported stearic acid instead of raw materials [5].
Methodical part. Experimental tests of raw materials of olein-palmitin mixture based on technical regulations were conducted in the laboratories of "Birinchi rezinotexnika Zavodi" LLC and Tashkent Scientific Research Institute of Chemical Technology, and the results are presented in tables 1 and 2 below.
Table 1.
's of the olein-palmitin additive
№ Test names Indicators
1 Appearance at 20 0C A cream-to-yellow product with a creamy to solid consistency and uniform composition
2 Solidification temperature, 0C 36-40
3 Acid content, mg KOH/g 195-200
4 The mass percentage of moisture, %, is not much 1,0
5 The mass percentage of unsaponifiable and unsaponifiable matter, %, is not much 3,0
After the chemical analysis, in the physical-mechanical testing laboratory, in a small mass, rubber mixtures were prepared in laboratory conditions based on the standard recipe for the use of raw materials of olein-palmitin mixture as a substitute for stearic acid. This process was carried out in a rolling mill at 65-70°C.
Extruded rubber mixture, vulcanizing flat press 55 gr. was pulled from the rubber mixture and placed in molds and baked at 150°C for 15 minutes under a pressure of 6-7 MPa. The cured rubber mixture from the vulcanizing flat press was cooled at room temperature for 16 hours and samples were taken for testing.
Table 2.
Study of compliance of the main indications for the use of olein-palmitic additives with regulatory documents
№ Types of tests Requirements GOST Indicators of rubber compound 301-L based on imported stearic acid Indicators of rubber compound 301-L based on olein-palmitic acid
Curve vulcanization line
160°C20 мин
160°C20 min 38 - 57 - 75
1 T30/s 80 - 120 - 160 61,7 59,6
T60/s 0,6 - 1,3 - 2,0 151,4 151,03
ML/dNm 12,3 - 8,4 - 4,5 1,24 1,26
MH/dN-m 7,15 7
2 Bond strength N/mm 0C >6,5 N/mm 6,9 5,1
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Results and their discussion: The cooled rubber mixture was tested for its strength at break, relative elongation at break, elasticity, modulus of elasticity in the "Electronic tensile testing machine "AI-7000"" device in laboratory conditions; The kinetics of the
vulcanization process were studied in the "Without rotor rheometer (Vulcanization device without rotor) M-3000A" device and the hardness in the "Izmeritel tverdosti po Shoru N14/1" device, and the results are presented in table 3.
Table 3.
Results of a study of hardness, relative elongation, elongation strength and kinetics of the vulcanization process of rubber compounds obtained on the basis of imported stearic acid and local raw materials olein-palmitin mixture
№ Rubber compound Hard-ness Discontinuity in relative expansion Tensile strength >Mpa 1800C*4 min
Vulcanization process
H/mm Mpa T30 s T60 s ML dNm MH dNm
1 Rubber compound obtained on the basis of imported stearic acid 56 511,77 12,9 32,63 34,92 7,23 14,14
2 A rubber mixture obtained on the basis of a mixture of local raw materials olein-palmitin 56 545,67 12,8 22,60 34,13 7,95 15,91
Curvilinear vulcanization of rubber compound results of vulcanization processes under munit were
obtained in laboratory conditions, viscosity by munit, investigated, and the results are shown in table 4.
tensile strength, elastic modulus, required tensile strength,
Table 4.
Curvilinear vulcanization, viscosity, tensile strength, elastic modulus, required tensile strength, results of vulcanization processes under the influence of rubber compounds obtained from a mixture of imported stearic acid
and local raw materials olein-palmitin
№ Types of tests Indicators of rubber mixture based on NC and imported stearic acid Indicators of rubber mixture based on NC and olein-palmitic acid
1 Curve vulcanization line 160°C20 min T30/s T60/s ML/dNm MH/dNm 34,9 45,7 1,5 21,05 34,75 45,1 1,55 20,9
2 Mooney viscosity (1+4) 100 0C 40,02 39,12
3 Elongation at break, % 680,00 786,92
4 Modulus of elasticity, Mna 100% 300% 0,602 1,39 0,570 1,32
5 Conditional tensile strength, Mna 20,10 20,85
6 Scalding Munite 5(1270C) 12,4 15,2
Conclusion. When the proposed additive was added, physical-mechanical properties such as viscosity, tensile strength, and elastic modulus of the rubber mixture were studied and it was found that it was close to all technical requirements and standards. The vulcanization process kinetics of the rubber mixture
obtained on the basis of olein-palmitin mixture raw materials, the hardness of the obtained product, the breaking strength, and the analysis of the percentage indicators of the relative elongation at break can be seen that this product can be recommended to be used as an import substitute raw material.
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