{"id":6646,"date":"2020-03-23T11:04:15","date_gmt":"2020-03-23T11:04:15","guid":{"rendered":"http:\/\/polymers.com.ua\/?p=6646"},"modified":"2020-03-23T11:04:15","modified_gmt":"2020-03-23T11:04:15","slug":"%d0%bf%d0%be%d0%bb%d0%b8%d1%8d%d1%82%d0%b8%d0%bb%d0%b5%d0%bd%d0%b0-%d0%b2%d1%8b%d1%81%d0%be%d0%ba%d0%be%d0%b9-%d0%bf%d0%bb%d0%be%d1%82%d0%bd%d0%be%d1%81%d1%82%d0%b8","status":"publish","type":"post","link":"https:\/\/polymers.com.ua\/en\/%d0%bf%d0%be%d0%bb%d0%b8%d1%8d%d1%82%d0%b8%d0%bb%d0%b5%d0%bd%d0%b0-%d0%b2%d1%8b%d1%81%d0%be%d0%ba%d0%be%d0%b9-%d0%bf%d0%bb%d0%be%d1%82%d0%bd%d0%be%d1%81%d1%82%d0%b8\/","title":{"rendered":"High Density Polyethylene (HDPE, HDPE)"},"content":{"rendered":"

\"\"High Density Polyethylene (\u041dDPE, HDPE, Low Pressure Polyethylene)<\/p>\n

Basic physicochemical properties<\/p>\n

Polyethylene (PE) [\u2013CH2 \u2013 CH2\u2013] n exists in two modifications that differ in structure and, therefore, in properties. Both modifications are obtained from ethylene CH2 = CH2. In one form, the monomers are connected in linear chains with a joint venture, usually 5000 or more; in the other, branches of 4\u20136 carbon atoms are randomly attached to the main chain. Linear polyethylenes are produced using special catalysts; polymerization proceeds at moderate temperatures (up to 150 \u00b0 C) and pressures (up to 20 atm).<\/p>\n

A polyethylene molecule is nothing more than a long chain of carbon atoms, each of which has two hydrogen atoms attached. Depending on the manufacturing method, macromolecules with different degrees of branching and different densities are obtained. Therefore, PE is divided into two main groups:<\/p>\n

1. Low density polyethylene
\nLow Density Polyethylene (LDPE) – PE with a relatively highly branched macromolecule and low density (0.916\u20130.935 g \/ cm\u00b3). The process of its manufacture proceeds at a very high pressure from 100 to 300 MPa and a temperature of 100\u2013300 \u00b0 C, therefore it is designated in the same way as high-pressure polyethylene (LDPE).<\/p>\n

2. High Density Polyethylene
\nHigh Density Polyethylene (HDPE) – PE with a linear macromolecule and relatively high density (0.960 g \/ cm\u00b3). This is polyethylene, also called low-pressure polyethylene (HDPE), it is obtained by polymerization with special catalyst systems.<\/p>\n

Linear polyethylenes form crystallinity regions that strongly affect the physical properties of the samples. This type of polyethylene is commonly called high density polyethylene; it is a very solid, durable and rigid thermoplastic widely used for injection and blow molding of containers used in the household and industry. High density polyethylene is stronger than low density polyethylene.<\/p>\n

Table. Properties of high density polyethylene<\/p>\n

\"\"<\/p>\n

The linear structure, which was mentioned earlier, is characteristic of PE obtained at low pressure, side chains are formed, but they are short and their number is small. Ethylene copolymers, for example with butene-1, are also obtained at low pressure in order to introduce a controlled number of branches into a linear, in essence, molecule. The density of the copolymers is 0.945-0.950 g \/ cm3, while the linear homopolymers are 0.960 g \/ cm3.<\/p>\n

HDPE-based films are more rigid, durable, and less waxy to the touch than LDPE-based films. They can be obtained by extrusion blowing or through a flat slot (with irrigation on a cooled roll or water cooling). Blown extrusion, however, produces a more cloudy, translucent film.<\/p>\n

The softening point of HDPE (121 \u00b0 C) is higher than that of LDPE, so it can withstand steam sterilization. Frost resistance is approximately the same as that of LDPE.<\/p>\n

The tensile and compressive strength is higher than that of LDPE, and the impact and tear resistance is lower. Due to the linear structure, HDPE molecules tend to orient in the flow direction, and the tear resistance in the longitudinal direction of the films is much lower. Differences in tear resistance in the longitudinal and transverse directions can be increased during orientation, and the properties of ribbons working on tear will be inherent in the film.<\/p>\n

The permeability of HDPE is lower than that of LDPE, about 5-6 times, and it is an excellent barrier to moisture.<\/p>\n

Among ordinary films, HDPE is inferior in moisture permeability only to films based on copolymers of vinyl chloride and vinyl idenchloride.<\/p>\n

In terms of chemical resistance, HDPE is also superior to LDPE, especially in resistance to oils and fats.<\/p>\n

With increasing density, the solubility in organic solvents decreases, as does the permeability with respect to solvents.<\/p>\n

HDPE is susceptible to cracking under the influence of the medium, as is LDPE, but this effect can be reduced by using high-molecular grades of PE in which this disadvantage is absent.<\/p>\n

PROPERTIES OF PND PIPE COMPOSITIONS<\/p>\n

Density = 0.948-0.964 kg \/ cm3 (according to GOST 15199-69).
\nTensile yield strength = not less than 21.6 MPa (according to GOST 11262-80).
\nElongation at break = at least 700% (according to GOST 11262-80).
\nFlexural modulus = 680-750 MPa (according to GOST 9550-81).
\nMelting point = 125-132 \u00b0 C (polarizing microscope).
\nSoftening point = 120-125 \u00b0 \u0421 (according to Vika).
\nThermal coefficient of linear expansion = (1.7-2.0) \u2022 0.0001-41 \/ \u00b0 \u0421 (according to GOST 15173-70).
\nHeat conductivity coefficient = 0.41-0.44 W \/ m \u2022 \u00b0 \u0421.
\nElectric strength (sample thickness 1 mm at a frequency of 50 Hz) = not less than 40 kV \/ mm (according to GOST 6433.3-7).
\nSpecific volume electric resistance = 1 \u2022 1016-1 \u2022 1017 Ohm \u2022 cm (GOST 6433.2-71).<\/p>\n

Areas of use<\/p>\n

The essential properties of all types of polyethylene (HDPE, LDPE, LLDPE):
\n– low density (lighter than water);
\n– very good chemical resistance;
\n– very little water absorption;
\n– impermeability to water vapor;
\n– high viscosity, flexibility, extensibility and elasticity in the temperature range from \u201370 to +100 \u00b0 \u0421;
\n– good transparency;
\n– easy processability by all methods suitable for thermoplastics;
\n– very good weldability.<\/p>\n

Fields of application of high-density polyethylene, as a rule, coincide with areas that consume low-density material, but the changed properties of the former undoubtedly improve the quality of the products produced. Thus, a film of high density polyethylene will be stronger and more transparent, molded parts may have a smaller cross section, and pipes and fibers will have greater strength. An increase in the melting temperature of new polyethylene allows for steam sterilization. These factors, combined with the ability to control the properties of the products will contribute to the increase in the use of polyethylene produced on surface catalysts. It should be noted that in some cases, the use of high density polyethylene can be limited by cracking during prolonged application of the load.
\nBut the relatively high permeability of polyethylene to oxygen, carbon dioxide, aromatic substances, as well as problems in contact with certain media (for example, wetting solutions), the phenomenon of the so-called cracking due to internal stresses, especially in HDPE, narrow its scope. The different properties of HDPE compared to LDPE are due to its high density. With the same thickness, HDPE products are tougher and harder. The melting point is 20 \u00b0 C higher, and due to the denser structure of the molecule, the impermeability to water vapor, oxygen, carbon dioxide and aromatic substances, as well as chemical resistance is better than that of LDPE. High melting point makes it possible to manufacture packages with higher heat resistance (short-term up to 100 \u00b0 C).<\/p>\n

A successful and rare combination of chemical resistance, mechanical strength, frost resistance, good dielectric properties, resistance to radiation, extremely low gas permeability and moisture absorption, lightness and harmlessness make polyethylene indispensable in a number of applications.<\/p>\n

HDPE is processed by almost all the basic methods used in working with thermoplastics – extrusion, blowing, injection molding, rotational molding.<\/p>\n

Table. Applications for HDPE<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u042d\u043a\u0441\u0442\u0440\u0443\u0437\u0438\u044f<\/b><\/td>\n<\/td>\n<\/tr>\n
\u041f\u043b\u0435\u043d\u043a\u0438<\/td>\n\u0424\u0430\u0441\u043e\u0432\u043e\u0447\u043d\u044b\u0439 \u043f\u0430\u043a\u0435\u0442, \u043f\u0430\u043a\u0435\u0442 “\u043c\u0430\u0439\u043a\u0430”, \u043f\u0430\u043a\u0435\u0442 \u0441 \u0432\u044b\u0440\u0443\u0431\u043d\u043e\u0439 \u0440\u0443\u0447\u043a\u043e\u0439, \u0431\u0430\u0440\u044c\u0435\u0440\u043d\u044b\u0439 \u0441\u043b\u043e\u0439 \u043c\u043d\u043e\u0433\u043e\u0441\u043b\u043e\u0439\u043d\u044b\u0445 \u0443\u043f\u0430\u043a\u043e\u0432\u043e\u0447\u043d\u044b\u0445 \u043c\u0430\u0442\u0435\u0440\u0438\u0430\u043b\u043e\u0432 (\u043b\u0430\u043c\u0438\u043d\u0430\u0442\u044b \u0438 \u043a\u043e\u044d\u043a\u0441\u0442\u0440\u0443\u0437\u0438\u043e\u043d\u043d\u044b\u0435 \u043f\u043b\u0435\u043d\u043a\u0438), \u0432\u043e\u0437\u0434\u0443\u0448\u043d\u043e-\u043f\u0443\u0437\u044b\u0440\u044c\u043a\u043e\u0432\u0430\u044f \u043f\u043b\u0435\u043d\u043a\u0430, \u043c\u0443\u0441\u043e\u0440\u043d\u044b\u0435 \u043f\u0430\u043a\u0435\u0442\u044b<\/td>\n<\/tr>\n
\u0422\u0440\u0443\u0431\u044b<\/td>\n\u0413\u0430\u0437\u043e\u0441\u043d\u0430\u0431\u0436\u0435\u043d\u0438\u0435, \u0445\u043e\u043b\u043e\u0434\u043d\u043e\u0435 \u0432\u043e\u0434\u043e\u0441\u043d\u0430\u0431\u0436\u0435\u043d\u0438\u0435, \u0437\u0430\u0449\u0438\u0442\u0430 \u044d\u043b\u0435\u043a\u0442\u0440\u043e\u0441\u0435\u0442\u0435\u0439, \u0434\u0440\u0435\u043d\u0430\u0436, \u0432\u043d\u0435\u0448\u043d\u044f\u044f \u043a\u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f, \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u044f\u044f \u043a\u0430\u043d\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f, \u043e\u0431\u0441\u0430\u0434\u043d\u044b\u0435 \u0442\u0440\u0443\u0431\u044b \u0434\u043b\u044f \u0441\u043a\u0432\u0430\u0436\u0438\u043d<\/td>\n<\/tr>\n
\u041a\u0430\u0431\u0435\u043b\u044c\u043d\u0430\u044f \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044f<\/td>\n\u0418\u0437\u043e\u043b\u044f\u0446\u0438\u044f \u043a\u0430\u0431\u0435\u043b\u0435\u0439 \u0432\u044b\u0441\u043e\u043a\u043e\u0433\u043e \u043d\u0430\u043f\u0440\u044f\u0436\u0435\u043d\u0438\u044f<\/td>\n<\/tr>\n
\u041b\u0438\u0441\u0442\u044b, \u043c\u0435\u043c\u0431\u0440\u0430\u043d\u044b, \u043c\u044f\u0433\u043a\u0438\u0435 \u043b\u0435\u043d\u0442\u044b<\/td>\n\u041b\u0438\u0441\u0442\u044b:<\/b>\u00a0\u0433\u0438\u0434\u0440\u043e\u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044f, \u0444\u043e\u0440\u043c\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u0435\u0442\u0430\u043b\u0435\u0439 \u0438\u0437\u0434\u0435\u043b\u0438\u0439 \u0434\u043b\u044f \u043c\u0430\u0448\u0438\u043d\u043e\u0441\u0442\u0440\u043e\u0435\u043d\u0438\u044f.\u00a0\u041c\u0435\u043c\u0431\u0440\u0430\u043d\u044b:<\/b>\u00a0\u0433\u0438\u0434\u0440\u043e\u0438\u0437\u043e\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u044b\u0435 \u0440\u0430\u0431\u043e\u0442\u044b.\u00a0\u041b\u0435\u043d\u0442\u044b<\/b>: \u043a\u043e\u043d\u0432\u0435\u0439\u0435\u0440\u043d\u044b\u0435 \u043b\u0435\u043d\u0442\u044b, \u0433\u0435\u043e\u044f\u0447\u0435\u0439\u043a\u0438<\/b><\/td>\n<\/tr>\n
\u0421\u0435\u0442\u043a\u0438<\/td>\n\u0411\u044b\u0442\u043e\u0432\u044b\u0435, \u0441\u0435\u043b\u044c\u0441\u043a\u043e\u0445\u043e\u0437\u044f\u0439\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0435, \u0441\u0435\u0442\u043a\u0438 \u0434\u043b\u044f \u0430\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u043e\u0440\u043e\u0436\u043d\u044b\u0445 \u043f\u043e\u043a\u0440\u044b\u0442\u0438\u0439, \u0441\u0435\u0442\u043a\u0438 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u0441\u0442\u0440\u043e\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0440\u0430\u0431\u043e\u0442, \u0441\u0435\u0442\u043a\u0438 \u0434\u043b\u044f \u043e\u0433\u0440\u0430\u0436\u0434\u0435\u043d\u0438\u044f \u0437\u0434\u0430\u043d\u0438\u0439 \u0438 \u0441\u043e\u043e\u0440\u0443\u0436\u0435\u043d\u0438\u0439<\/td>\n<\/tr>\n
\u0412\u044b\u0434\u0443\u0432<\/b><\/td>\n<\/td>\n<\/tr>\n
\u041f\u043b\u0435\u043d\u043a\u0438<\/td>\n\u0424\u0430\u0441\u043e\u0432\u043e\u0447\u043d\u044b\u0439 \u043f\u0430\u043a\u0435\u0442, \u043f\u0430\u043a\u0435\u0442 “\u043c\u0430\u0439\u043a\u0430”, \u043f\u0430\u043a\u0435\u0442 \u0441 \u0432\u044b\u0440\u0443\u0431\u043d\u043e\u0439 \u0440\u0443\u0447\u043a\u043e\u0439, \u043c\u0443\u0441\u043e\u0440\u043d\u044b\u0435 \u043f\u0430\u043a\u0435\u0442\u044b<\/td>\n<\/tr>\n
\u0415\u043c\u043a\u043e\u0441\u0442\u0438<\/td>\n\u0424\u043b\u0430\u043a\u043e\u043d\u044b \u0434\u043b\u044f \u043a\u043e\u0441\u043c\u0435\u0442\u0438\u043a\u0438, \u043f\u0430\u0440\u0444\u044e\u043c\u0435\u0440\u0438\u0438, \u0431\u044b\u0442\u043e\u0432\u043e\u0439 \u0445\u0438\u043c\u0438\u0438, \u043a\u0430\u043d\u0438\u0441\u0442\u0440\u044b, \u0431\u043e\u0447\u043a\u0438, \u0431\u0430\u043a\u0438, \u0446\u0438\u0441\u0442\u0435\u0440\u043d\u044b<\/td>\n<\/tr>\n
\u041b\u0438\u0442\u044c\u0435 \u043f\u043e\u0434 \u0434\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c<\/b><\/td>\n<\/td>\n<\/tr>\n
\u0422\u043e\u0432\u0430\u0440\u044b \u043d\u0430\u0440\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u044f<\/td>\n\u0418\u0437\u0434\u0435\u043b\u0438\u044f \u0434\u043b\u044f \u0446\u0432\u0435\u0442\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0430, \u0438\u0437\u0434\u0435\u043b\u0438\u044f \u0434\u043b\u044f \u0432\u0430\u043d\u043d\u043e\u0439 \u043a\u043e\u043c\u043d\u0430\u0442\u044b, \u0438\u0437\u0434\u0435\u043b\u0438\u044f \u0434\u043b\u044f \u043a\u0443\u0445\u043d\u0438, \u043f\u0440\u0435\u0434\u043c\u0435\u0442\u044b \u0434\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u043e\u0431\u0438\u0445\u043e\u0434\u0430, \u0434\u0435\u0442\u0441\u043a\u0438\u0435 \u0442\u043e\u0432\u0430\u0440\u044b, \u0441\u0430\u0434\u043e\u0432\u043e-\u043e\u0433\u043e\u0440\u043e\u0434\u043d\u044b\u0439 \u0438\u043d\u0432\u0435\u043d\u0442\u0430\u0440\u044c<\/td>\n<\/tr>\n
\u041a\u0440\u044b\u0448\u043a\u0438<\/td>\n\u0414\u0432\u0443\u0445\u0441\u043e\u0441\u0442\u0430\u0432\u043d\u044b\u0435 \u0438 \u043e\u0434\u043d\u043e\u0441\u043e\u0441\u0442\u0430\u0432\u043d\u044b\u0435 \u043a\u0440\u044b\u0448\u043a\u0438 \u0434\u043b\u044f \u041f\u042d\u0422 \u0431\u0443\u0442\u044b\u043b\u043e\u043a, \u0443\u043a\u0443\u043f\u043e\u0440\u043e\u0447\u043d\u044b\u0435 \u0438\u0437\u0434\u0435\u043b\u0438\u044f \u0434\u043b\u044f \u043f\u0430\u0440\u0444\u044e\u043c\u0435\u0440\u0438\u0438, \u043a\u043e\u0441\u043c\u0435\u0442\u0438\u043a\u0438, \u0431\u044b\u0442\u043e\u0432\u043e\u0439 \u0445\u0438\u043c\u0438\u0438, \u0430\u0432\u0442\u043e\u0445\u0438\u043c\u0438<\/td>\n<\/tr>\n
\u042f\u0449\u0438\u043a\u0438<\/td>\n\u0422\u0430\u0440\u043d\u044b\u0435 \u044f\u0449\u0438\u043a\u0438<\/td>\n<\/tr>\n
\u041c\u0435\u0431\u0435\u043b\u044c\u043d\u0430\u044f \u0444\u0443\u0440\u043d\u0438\u0442\u0443\u0440\u0430<\/td>\n\u041b\u0438\u0446\u0435\u0432\u0430\u044f, \u0434\u0435\u043a\u043e\u0440\u0430\u0442\u0438\u0432\u043d\u0430\u044f, \u043a\u0440\u0435\u043f\u0435\u0436\u043d\u0430\u044f, \u043e\u043f\u043e\u0440\u043d\u044b\u0435 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b, \u043f\u0440\u043e\u0447\u0438\u0435 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442\u0443\u044e\u0449\u0438\u0435<\/td>\n<\/tr>\n
\u0410\u0432\u0442\u043e\u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0442\u0443\u044e\u0449\u0438\u0435<\/td>\n\u041e\u043a\u043e\u043b\u043e 400 \u043d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0439 \u0438\u0437\u0434\u0435\u043b\u0438\u0439 \u0434\u043b\u044f \u0430\u0432\u0442\u043e\u043c\u043e\u0431\u0438\u043b\u044f<\/td>\n<\/tr>\n
\u0414\u0440\u0443\u0433\u0430\u044f \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u044f<\/td>\n\u041d\u0435 \u0431\u0443\u0434\u0443\u0447\u0438 \u043f\u0440\u0438\u043e\u0440\u0438\u0442\u0435\u0442\u043d\u044b\u043c \u0432\u0438\u0434\u043e\u043c \u0441\u044b\u0440\u044c\u044f \u041f\u042d\u041d\u0414 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u043f\u0440\u043e\u0438\u0437\u043e\u0434\u0441\u0442\u0432\u0435 \u0434\u0440\u0443\u0433\u043e\u0439 \u043b\u0438\u0442\u044c\u0435\u0432\u043e\u0439 \u043f\u0440\u043e\u0434\u0443\u043a\u0446\u0438\u0438: \u043c\u0435\u0431\u0435\u043b\u0438, \u0442\u0430\u0440\u043d\u044b\u0445 \u0432\u0435\u0434\u0435\u0440, \u0434\u0435\u0442\u0441\u043a\u0438\u0445 \u0438\u0433\u0440\u0443\u0448\u0435\u043a, \u0444\u0438\u0442\u0438\u043d\u0433\u043e\u0432<\/td>\n<\/tr>\n
\u0420\u043e\u0442\u043e\u0444\u043e\u0440\u043c\u043e\u0432\u0430\u043d\u0438\u0435<\/b><\/td>\n<\/td>\n<\/tr>\n
\u0415\u043c\u043a\u043e\u0441\u0442\u0438<\/td>\n\u0411\u0430\u043a\u0438, \u043c\u0443\u0441\u043e\u0440\u043d\u044b\u0435 \u0431\u0430\u043a\u0438, \u0431\u043e\u0447\u043a\u0438,<\/td>\n<\/tr>\n
\u041c\u043e\u0431\u0438\u043b\u044c\u043d\u044b\u0435 \u0442\u0443\u0430\u043b\u0435\u0442\u044b<\/td>\n\u041f\u0435\u0440\u0435\u0434\u0432\u0438\u0436\u043d\u044b\u0435 \u0442\u0443\u0430\u043b\u0435\u0442\u044b<\/td>\n<\/tr>\n
\u0414\u0435\u0442\u0441\u043a\u0438\u0435 \u043f\u043b\u043e\u0449\u0430\u0434\u043a\u0438<\/td>\n\u0414\u0435\u0442\u0441\u043a\u0438\u0435 \u0438\u0433\u0440\u043e\u0432\u044b\u0435 \u043a\u043e\u043c\u043f\u043b\u0435\u043a\u0441\u044b (\u0433\u043e\u0440\u043a\u0438, \u0433\u043e\u0440\u043a\u0438-\u0442\u043e\u043d\u043d\u0435\u043b\u044c, \u0433\u043e\u0440\u043e\u0434\u043a\u0438)<\/td>\n<\/tr>\n
\u0414\u043e\u0440\u043e\u0436\u043d\u044b\u0435 \u043e\u0433\u0440\u0436\u0434\u0435\u043d\u0438\u044f<\/td>\n\u0414\u043e\u0440\u043e\u0436\u043d\u044b\u0435 \u0431\u043b\u043e\u043a\u0438, \u043a\u043e\u043d\u0443\u0441\u044b, \u0431\u0443\u0444\u0435\u0440\u044b<\/td>\n<\/tr>\n
\u041a\u043e\u043b\u043e\u0434\u0446\u044b<\/td>\n\u041a\u043e\u043b\u043e\u0434\u0446\u044b, \u0441\u0435\u043f\u0442\u0438\u043a\u0438, \u043c\u0443\u0441\u043e\u0440\u043e\u0441\u0431\u043e\u0440\u044b<\/td>\n<\/tr>\n
\u042d\u0441\u0442\u0430\u043a\u0430\u0434\u044b<\/td>\n\u042d\u0441\u0442\u0430\u043a\u0430\u0434\u044b \u0434\u043b\u044f \u043c\u043e\u0439\u043a\u0438 \u043a\u043e\u043b\u0435\u0441, \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043e\u0431\u043e\u0440\u043e\u0442\u043d\u043e\u0433\u043e \u0432\u043e\u0434<\/td>\n<\/tr>\n
\u0412\u0441\u043f\u0435\u043d\u0438\u0432\u0430\u043d\u0438\u0435<\/b><\/td>\n<\/td>\n<\/tr>\n
\u041f\u0435\u043d\u043e\u043f\u043e\u043b\u0438\u044d\u0442\u0438\u043b\u0435\u043d<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

<\/p>","protected":false},"excerpt":{"rendered":"

High Density Polyethylene (\u041dDPE, HDPE, Low Pressure Polyethylene) Basic physicochemical properties Polyethylene (PE) [\u2013CH2 \u2013 CH2\u2013] n exists in two modifications that differ in structure and, therefore, in properties. Both modifications are obtained from ethylene CH2 = CH2. In one form, the monomers are connected in linear chains with a joint venture, usually 5000 or […]<\/p>\n

Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/posts\/6646"}],"collection":[{"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/comments?post=6646"}],"version-history":[{"count":1,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/posts\/6646\/revisions"}],"predecessor-version":[{"id":6649,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/posts\/6646\/revisions\/6649"}],"wp:attachment":[{"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/media?parent=6646"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/categories?post=6646"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/polymers.com.ua\/en\/wp-json\/wp\/v2\/tags?post=6646"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}