MODIFICATION OF POLYMER BRICKS TO OBTAIN NEW PRODUCTS

PRODUCTS

Rasulova S.M, Kocharov R.A, Kholiyorova M.K, Tajiyev P.J

Termiz State University

Abstract

The article describes how to process secondary polymer wastes by adding special fillers to them, changing their properties, obtaining new polymer composites with important properties such as fluidity, melting and thermal conductivity.

Key words: polymer, secondary polymer waste, basalt, filler, composite, compound, film, pipe, elasticity.

Introduction. With the development of urban planning in the world, the need for materials that increase the useful life of construction structures and protect them from the effects of external aggressive environment, including: sealants, mastics or pastes, films, porous elastic and profiled materials, is also increasing. Sealants are widely used in engineering, electrical engineering, aviation, and medicine along with the construction industry. Accordingly, oligomer-based sealants are very important for protecting construction structures from air oxygen and other aggressive environments, and for sealing cracks [1].

Currently, the demand for modified polymer brick products is increasing sharply. In recent years, sufficient progress has been made in the improvement of modified polymer materials. This is of great importance in opening new aspects of the physicochemistry of composite materials [2].

In their work, the authors wrote that by adding fillers with special characteristics to the composition of thermoplastic polymers, they can change their properties, acquire important properties such as liquefaction, melting and thermal conductivity [3; pp. 168- 171].

Research method. The secondary polymer waste was mechanically crushed to a size of 1-5 mm, heated in a porcelain mortar at a temperature of 1750C, melted, and a small amount of fillers were added to it with regular stirring.

Experience part. In this work, an overview of the substances and materials used as fillers is given to change the properties of polymers and to obtain composite materials based on them. developed. General characteristics of these filler groups are given and their division into mineral, organic and other subgroups is considered. For substances and materials, information about their application characteristics is given [4; pp. 459- 465].

Basalt's unique properties have made it one of the most essential materials. Basalt is non-combustible and can withstand temperatures up to 9000C-15000C. is a filler that does not accumulate radiation in the wall. Basalt is an environmentally friendly material, harmless to humans and animals [5].

Basalt is one of the volcanic rocks with high strength and high density, as well as high chemical properties, fire resistance, strength, sound and thermal insulation properties [6].

Secondary polymer waste was mechanically crushed in a mill, cleaned of foreign substances, calcined at a temperature of 175 0C, liquefied, and basalt powder was added to it with constant stirring. When a thick viscous substance was formed, heating was stopped. The obtained results are presented in Table 1.

Table 1

Properties of composites obtained by adding fillers to secondary polymer

waste

Compozite Content Color Solubility Temperature,

0C

Bazalt-polietilen 1:5 Dark brown Insolubly in

heksan

175 0 C

Bazalt-polistirol 1:5 Black Insolubly in

chloroform

175 0 C

Bazalt-polipropilen 1:5 Black Insolubly in

ethilamin

175 0 C

Due to the unique combination of properties of the obtained composites, such as high strength, low density, high electrical and thermal insulation properties, and resistance to chemically aggressive environments, it was found that fiber-reinforced polymer composite materials (PCM) are widely used in various fields. A monolithic material with high-strength fibers connected by a polymer matrix is a polymer composite. Fibers determine the strength and hardness of the material, the matrix ensures the completeness of their mechanical properties, as well as temperature behavior, resistance to environmental factors.

We must not forget about the third component, the interfacial layer - the interface between the fiber and the binder, because this is often the weakest point of the composition and its destruction begins. Therefore, the work is aimed at studying all three components of the composition. [7; -3-6 p.]

In this article, it is shown that the introduction of a dispersible filler into polyethylene allows to increase the whole range of thermal and physical properties, and the flammability indicators of the developed polymer matrix composites can also be improved [8. 74 b].

References:

1. Turdiboyev I.X, Axmadjonov L.X. Mineralo-bazaltovie volokna vzamen konserogennix asbestsoderjaщix kompozitsionnix materialov // Universum: texnicheskiye nauki. Vipusk: 1(94) Yanvar 2022, Str 30

2. V.D. Valixov, N.I. Kaxidze, A.B. Vorojsov. Cintez i issledovaniye mexanicheskix svoystv kompozitsionnogo materiala na osnove alyuminiya, uprochnyonnogo voloknami bazalta // Tomskiy gosudarstvenniy universitet 634050, Tomsk. Tezisi dokladov. Novosibirsk – Sheregesh. 28 fevralya – 6 marta 2020 g., Str

3. Muhiddinov N.Z, Raxmatullaev.M.M. To improve the technology of obtaining polymer composite materials on the basis of fillers that provide special properties //Texas Journal of Multidisciplinary Studies, 3, 168–171. Retrieved from (2021)

4. Kolosova A.S., Sokolskaya M.K., Vitkalova I.A., Torlova A.S., Pikalov YE.S. Napolniteli dlya modifikatsii sovremennix polimernix kompozitsionnix materialov //fgbou vo «Vladimirskiy gosudarstvenniy universitet imeni Aleksandra Grigorevicha i Nikolaya Grigorevicha Stoletovix”, Vladimir, Texnicheskiye nauki (05.02.00, 05.13.00, 05.17.00, 05.23.00) str. 459-465. UDK 691.175.5/.8. 2017.

5. Samoylenko V.V. Blaznov A.N. Sovershenstvovaniye retsepturnotexnologicheskix parametrov izgotovleniya namotochnix kompozitov na osnove epoksiangidridnix matrits, armirovannix bazaltovimi i steklyannimi voloknami// 05.17.06 – Texnologiya i pererabotka polimerov i kompozitov. Biysk 2018.str 3-6

6. Alikulova D.A, Tojiyev P.J, Turayev X.X, Djalilov A.T. Vliyaniye napolniteley na teplofizicheskiye svoystva polietilena // universum: ximiya i biologiya № 8 (74) avgust, 2020 g. Str 74.

7. Normurodov B.A., Turayev H.Kh., Tajiyev P.J., Djalilov., Pardayeva N.J. Modification i primeneniye tiokolovikh hermetikov. // Academician A.F. A collection of materials of the 6th Republican Scientific and Practical Conference "Actual Problems of Analytical Chemistry" dedicated to the 90th anniversary of Ganiyev. - Termiz.:-April 24-26. -2020. - p. 230-231.

8. Normurodov B.A., Turayev H.Kh., Tajiyev P.J., Djalilov., Pardayeva N.J. Synthesis of thiokolovikh oligomerov. // Academician A.G. A collection of materials of the 6th Republican Scientific and Practical Conference "Actual Problems of Analytical Chemistry" dedicated to the 90th anniversary of Ganiyev. -Termiz.:-April 24-26. -2020. - p. 232-233