ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
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IMPROVING THE DURABILITY OF MACHINE-BUILDING
COMPOSITE POLYMERIC AND PAINT-AND-LACQUER MATERIALS
AND COATINGS BY LOWERING INTERNAL STRESSES AND
DEVELOPING A TECHNOLOGY FOR THEIR PRODUCTION
Ahadjon Ulmasov Akramjon o‘g‘li
Assistant department of “Mechanical Engineering and Automation”
Sayfiyev Behzod Xusan ugli
Student
Fergana Polytechnic Institute, Fergana street 86, Fergana region, Uzbekistan.
ahadjonulmasovuz@gmail.com , a.a.ulmasov@ferpi.uz
ORCID: 0000-0002-9333-7125
https://doi.org/10.5281/zenodo.13377633
Abstract.
The proposed organomineral additives are novel, eco- friendly
components for polystyrene paints. A light brown-red loam was used as a filler
for polystyrene paints. Rheological, technological and physico-mechanical
properties of paints and coatings based on them were studied by a series of
standard tests. Characteristics of frost and water resistance, hiding power and
holding capacity of polystyrene paint confirmed the creation of durable paints
with high performance properties. Comprehensive studies have shown that the
addition of organic additives in the composition of polystyrene paint increases
the critical volume concentration of pigment 1.2 times, increases the degree of
grinding paint, reduces dispersion time (2 times) and reduces the speed of
shelter from 160 to 112 g / m2. Analysis of the results of experiments showed
that the addition of organic additives contributes to increased resistance to
external influences, as well as the strength of adhesion to the substrate by 22 %.
Using the obtained results will allow you to create polystyrene paints with a low
content of volatile compounds and increased crack resistance.
Keywords:
buildings, construction, facades, organomineral additive,
polystyrene paint, clay, volatile organic compounds
Introduction
Nanomaterials (pigments, additives) are effective in all
types of coatings (organic, water-dispersed, powder). In the case of polymer
nanocomposites, nanoparticulate substances are introduced into the polymer
matrix. The role of such substances can be performed by organoclays obtained
by modifying montmorillonite clays with an organic additive. The chemical
composition of clay causes the presence of inorganic cations on the surface of
the plates, giving the surface high hydrophilicity and, accordingly,
incompatibility with many polymer resins. For successful formation of a clay-
polymer nanocomposite, an appropriate surface treatment should be carried
out, reducing the polarity of the clay to make the clay «organophilic». Modified
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
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clay (organoclay) has several advantages over simple clay: organoclays are well
dispersed in the polymer matrix and interact with the polymer chain. The
addition of organoclay into the polymer matrix contributes to the improvement
of the mechanical properties of polymers and thermal stability. This is achieved
by combining the complex properties of organic (lightness, flexibility, plasticity)
and inorganic (strength, heat resistance, chemical resistance) materials.
Every year more and more stringent requirements are imposed on paints and
coatings based on them in connection with the advent of new technologies in
industry, construction and the formation of modern aesthetic tastes at the
consumer. This applies to both the protective and decorative properties of
coatings, which are determined by the physicochemical parameters of all
components of the paintwork formulation. In recent years, the demand for high-
quality products, characterized by increased durability and lower consumption
per unit of the painted area, has increased. At the beginning of 21-nd century,
three factors had a significant influence on the main directions of development
of the global paint industry. First, the tightening of environmental legislation on
the content of volatile organic compounds (VOC) in paint and varnish products.
Secondly, it is the search for substitutes for traditional paints and varnishes,
which use organic solvents as a basis (mainly solvents and white spirit, as well
as drying oil). Thirdly - the economic factor acting in full force in connection
with the tightening of environmental legislation. Its action led to a resurgence of
interest in the use of powder paints. Trends in the development of materials
move in the direction of minimizing the solvent content in paint systems, while
achieving professional quality that meets all environmental requirements. The
advantages of such paints include, first of all, the possibility of their use at low
temperatures, which can significantly increase the seasonality of the finishing
works. This group of paints is characterized by the formation of a durable and
well adhered to a variety of substrates protective film with high rates of frost
resistance.
Especially attractive for the use of polystyrene in the paint industry is the
comparative cheapness of this polymer, which is associated with the availability
of raw materials, simple manufacturing technology, valuable properties. Despite
the advantages of polystyrene, it is extremely limited in the paint industry. One
of the reasons is its high brittleness temperature, which is 90 °C and is almost
close to the glass transition temperature of the polymer. In this regard, the
difference between the lower and upper boundaries of the temperature range of
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
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operation of the coatings is small, which can cause their cracking at low
temperatures.
Conclusion
In order to analyse the occurrence of internal stresses and develop a
new method and installations, below are the results of studying and analysing
the occurrence of internal stresses and existing methods, instruments and
installations for determining internal stresses in polymer and paint coatings.
References:
1. Fibrous and dispersion-strengthened composite materials / edited by N. V.
Ageev. - Moscow: Nauka, 1976. - 214 p.
2. Fibrous composite materials / edited by M. Kh. Shorshorov . - Moscow:
Mashinostroenie, 1983. - 320 p.
3. Fibrous Composite Materials: translated from English / edited by J. Wheaton
and E. Skala. - Moscow: Metallurgy, 1978. - 238 p.
4. Жегера К.В., Пышкина И.С., Мартяшин Г.В. Клеевая сухая строительная
смесь с применением аморфных алюмосиликатов // Инженерно-
строительный журнал. 2018. № 6(82). С. 23-31.
5. Kristoffersen M., Pettersen J.E., Aune V., B0rvik T. Experimental and numerical
studies on the structural response of normal strength concrete slabs subjected
to blast loading // Engineering Structures. 2018. Vol. 174. Pp. 242-255.
