Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires
Creation of cables and wires with polymer insulation without halogens based on ethylene vinyl acetate with a high content of fire retardants is impossible without radiation modification properties. On the industrial accelerator of charged particles, the effect of ionizing radiation on wires with a...
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| Date: | 2018 |
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Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2018
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| Cite this: | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires / G.V. Bezprozvannych, I.A. Mirchuk // Вопросы атомной науки и техники. — 2018. — № 5. — С. 40-44. — Бібліогр.: 12 назв. — англ. |
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| author | Bezprozvannych, G.V. Mirchuk, I.A. |
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| citation_txt | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires / G.V. Bezprozvannych, I.A. Mirchuk // Вопросы атомной науки и техники. — 2018. — № 5. — С. 40-44. — Бібліогр.: 12 назв. — англ. |
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| container_title | Вопросы атомной науки и техники |
| description | Creation of cables and wires with polymer insulation without halogens based on ethylene vinyl acetate with a
high content of fire retardants is impossible without radiation modification properties. On the industrial accelerator
of charged particles, the effect of ionizing radiation on wires with a copper conductor cross section of 1.0 mm² and
an insulation thickness of 0.7 mm is performed. The influence of the electron energy at identical irradiation factors
on the increase in the mechanical strength of insulation during stretching is shown. For electron energy of 0.5 MeV,
an increase in the mechanical strength of insulation at a tension of 27% was established, the insulation resistance
more than doubled, and the breakdown voltage by 35% at the optimum radiation dose relative to the unirradiated
state.
Створення кабелів і проводів з полімерною ізоляцією без вмісту галогенів на основі сополімеру
етиленвінілацетату з високим вмістом антипіренів неможливо без радіаційного модифікування
властивостей. На промисловому прискорювачі заряджених частинок виконано вплив іонізуючого
випромінювання на зразки проводу з мідною жилою перетином 1,0 мм²
і товщиною ізоляції 0,7 мм.
Показано вплив енергії електронів при однакових коефіцієнтах опромінення на підвищення механічної
міцності ізоляції при розтягуванні. Для енергії електронів 0,5 МеВ встановлено підвищення механічної
міцності ізоляції при розтягуванні - на 27%, опору ізоляції – більш ніж в два рази і пробивної напруги – на
35% при оптимальній дозі опромінення щодо неопроміненого стану
Создание кабелей и проводов с полимерной изоляцией без содержания галогенов на основе сополимера
этиленвинилацетата с высоким содержанием антипиренов невозможно без радиационного
модифицирования свойств. На промышленном ускорителе заряженных частиц выполнено воздействие
ионизирующего излучения на образцы провода с медной жилой сечением 1,0 мм²
и толщиной изоляции
0,7 мм. Показано влияние энергии электронов при одинаковых коэффициентах облучения на повышение
механической прочности изоляции при растяжении. Для энергии электронов 0,5 МэВ установлено
повышение механической прочности изоляции при растяжении - на 27%, сопротивления изоляции – более
чем в два раза и пробивного напряжения – на 35% при оптимальной дозе облучения относительно
необлученного состояния.
|
| first_indexed | 2025-12-07T15:47:13Z |
| format | Article |
| fulltext |
40 ISSN 1562-6016. ВАНТ. 2018. №5(117)
UDC 621.319
INFLUENCE OF TECHNOLOGICAL DOSE OF IRRADIATION
ON MECHANICAL AND ELECTRICAL CHARACTERISTICS
OF POLYMERIC INSULATION OF WIRES
G.V. Bezprozvannych
1
, I.A. Mirchuk
2
1
National Technical University “Kharkiv Polytechnic Institute”, Kharkov, Ukraine
E-mail: bezprozvannych@kpi.kharkov.ua;
2
Private Joint Stock Company “Ukraine Scientific-Research Institute of Cable Industry”,
Berdyansk, Ukraine
Creation of cables and wires with polymer insulation without halogens based on ethylene vinyl acetate with a
high content of fire retardants is impossible without radiation modification properties. On the industrial accelerator
of charged particles, the effect of ionizing radiation on wires with a copper conductor cross section of 1.0 mm
2
and
an insulation thickness of 0.7 mm is performed. The influence of the electron energy at identical irradiation factors
on the increase in the mechanical strength of insulation during stretching is shown. For electron energy of 0.5 MeV,
an increase in the mechanical strength of insulation at a tension of 27% was established, the insulation resistance
more than doubled, and the breakdown voltage by 35% at the optimum radiation dose relative to the unirradiated
state.
INTRODUCTION
Electron-beam technologies are widely used in the
cable industry for the radiation cross-linking of polymer
insulation and protective shells [1–5]. Sources of
ionizing radiation for modifying the polymer insulation
of cables and wires with current-conducting veins of
0.5…120 mm
2
cross section are electron accelerators
with energies 0.3…5 MeV and power up to hundreds of
kilowatt. Physical modification has significant
advantages in comparison with chemical cross-linking:
the possibility of modifying a wide range of polymers of
different chemical structure; reagentless technologies,
i.e. no need to use initiators, cross-linking accelerators;
solid phase technology at normal temperature, which
eliminates the use of solvents and high temperatures.
Application of the technology of radiation modification
provides a qualitative change in electrical, mechanical,
thermal and other properties as a result of irradiation of
cables and wires [4–9]. As a result, the service life is
prolonged, the heat resistance, the current throughput
are improved, and the physical properties of the cables
and wires are improved.
The most common way to irradiate cable products
around the world at present is bilaterally irradiated.
With this method, there is no shadow effect from the
conductive core of the cable (wire).
The main parameter determining the degree of
radiation modification of the insulation of cables and
wires in the technological stage of manufacture is the
radiation dose absorbed by the insulating material [2–4].
The determination of the absorbed by the insulation or
the shell dose is problematic because of the uneven
distribution of it due to the design of the cables (round
shape) and the technology of radiation modification. In
connection with this, in the physical modification of
insulation and cable sheaths, an irradiation factor (K) is
used, representing the ratio of the conductor transfer
velocity under the electron beam to the electron beam
current. The inverse of the irradiation factor is the
technological dose of irradiation (1/K). Polymers with
the same chemical formula are cross-linked differently
depending on the process dose and thickness. The
justification of the technological dose of irradiation,
determined at the stage of investigation of the cable
composition and the development of the cable (wire), is
the result of a compromise between the various
properties and technical requirements imposed on the
finished product.
The purpose of the article is to investigate the effect
of the technological dose of irradiation on the
mechanical and electrical characteristics of a halogen-
free composition based on an ethylene-vinyl acetate
copolymer with a high filling of wire insulation with
flame retardants.
METHODOLOGY OF PHYSICAL
MODELING OF RADIATION EXPOSURE
OF SAMPLES OF A WIRE
The use of cables that do not spread combustion and
do not contain halogens [10, 11] is an actual problem,
for the solution of which modern highly flame retardant
polymeric insulating compositions containing halogens
are used. Aluminium hydroxide Al(OH)3 and
magnesium Mg(OH)2 are used as industrial flame
retardants of synthetic and natural origin [12]. The
mechanism of the fire retardant action of hydroxides
consists in the absorption of a large amount of heat due
to the release of water as the temperature rises.
Compositions based on ethylene vinyl acetate
copolymer (EVA) are the most popular in the cable
industry, do not contain halogens in their structure and
have high elasticity, good adhesion to various materials.
Using EVA in cross-linked polymer cable compositions
improves processability, improves the ability to absorb
mineral filler and resistance to high temperatures.
To ensure uniform cross-linking throughout the
volume of insulation, the accelerator must work with
stable parameters of the electron beam: energy, beam
current, front radiation width. An important factor of
irradiation is the dose rate of the installation: low dose
rate leads to an increase in the duration of the irradiation
process and the need to take measures to prevent
ISSN 1562-6016. ВАНТ. 2018. №5(117) 41
oxidation of the polymer upon irradiation (the need to
apply vacuum or inert environment). It is possible to
“overexpose” the insulation and lose its necessary
properties, first of all, elasticity at doses corresponding
to the processes of destruction.
Radiation modification of wire samples with copper
conductor of 1.0 mm
2
cross section with highly filled
flame retardants (up to 70% by weight) halogen-free
based on a 0.7 mm thick ethylene vinyl acetate
copolymer was carried out by exposure to ionizing
radiation at an industrial ELV-1 charged particle
accelerator with a foil outlet (Tabl. 1).
Table 1
Technical characteristics of electron accelerators
Accelerator
type
Energy
range, MeV
Power in the
beam, kW
Maximum beam
current, mA
ELV-0.5 0.4…0.7 25 40
ELV-1 0.4…0.8 25 40
ELV-2 0.8…1.5 20 25
ELV-3 0.5…0.7 50 100
Inside the boiler filled with SF6 gas, is the primary
winding, a high-voltage rectifier with an in-built
accelerator tube, a high-voltage electrode and an
injector control unit. It is the location of the accelerating
tube inside the column of the high-voltage rectifier that
makes the ELV accelerators the most compact among
the machines of their class. The elements of the vacuum
system with the outlet device are attached to the bottom
of the boiler. Electrons emitted by the cathode located at
the upper end of the accelerator tube pass through the
elements of the vacuum system and enter the outlet
device where, with the help of electromagnets, the
sweeps are uniformly distributed along the foil and
discharged to the atmosphere. The irradiated material is
transported under the frame of the discharge window.
Samples of wires 5 m long are irradiated with
different irradiation factors K in a fairly wide range: 17;
15; 13; eleven; 10; 9; 8; 7; 6; 5, and 4 at an accelerated
electron energy of 0.5 MeV, and 11; 9, and 7 at an
accelerated electron energy of 0.4 MeV. One sample is
control (not exposed to radiation).
The coefficient of irradiation of the insulation was
regulated by a change in the speed of passage of an
isolated vein under an electron beam with an unchanged
electron beam current equal to 10 mA. The number of
wire passes under the electron beam, which depends on
the thickness of the irradiated insulation, is 80.
In the initial state (before irradiation) and after
exposure, mechanical and electrical tests of wire
samples were carried out.
RESULTS OF THE RESEARCH
The physical and mechanical properties of the
insulation of wire samples irradiated by electrons with
an energy of 0.4 and 0.5 MeV are significantly
different: with decreasing electron energy, the tensile
strength decreases (Fig. 1), and the elongation increases
(Fig. 2). When the electron energy is changed by 25%
(from 0.4 to 0.5 MeV), the tensile strength increases
practically by 20% over the entire irradiation dose range
(see Fig. 1). The insulation irradiated with electrons
with energy of 0.4 MeV has a lower degree of cross-
linking compared to samples irradiated with electrons
with an energy of 0.5 MeV, with identical irradiation
factors K.
0.09 0.1 0.11 0.12 0.13 0.14 0.15
10.5
11
11.5
12
12.5
13
13.5
1/K
,MPa
E=0,4 MeV
E=0,5 MeV
Fig. 1. Effect of electron energy on the tensile strength
of halogen-free filled insulation of wire samples
0.09 0.1 0.11 0.12 0.13 0.14 0.15
135
140
145
150
155
160
165
170
175
180
1/K
, MPa
E=0,4 MeV
E=0,5 MeV
Fig. 2. Effect of electron energy on the elongation at
break of halogen-free filled insulation of wire samples
The results of measurements of mechanical (average
values for 5 measurements) and electrical (single
measurement values) of the characteristics of wires with
high fireproof insulation for different irradiation factors
for electrons with an energy of 0.5 MeV are given in
Tabl. 2. The mechanical characteristics vary in different
ways with a decrease in the irradiation coefficient K,
i. e. with increasing technological radiation dose (1/K).
In comparison with the unirradiated condition, the
tensile strength increases by 27% to an irradiation dose
value of 0.2, after which it begins to decrease
insignificantly (Fig. 3). The relative elongation
throughout the entire range of the irradiation coefficient
decreases monotonically (Fig. 4). For an irradiation
dose value of 0.2, the elongation is reduced by 67%
relative to the original, unirradiated condition.
The nature of the change in electrical characteristics
is identical to the dynamics of the change in tensile
strength (see Tabl. 2, Figs. 5, 6): with respect to the
unirradiated state, the insulation resistance increases by
more than two times, the breakdown voltage by 35% at
an irradiation dose of 0.15, respectively.
The results of tests of insulation specimens on
thermal deformation at a temperature of 200 °C for
15 min show that the relative elongation Δl under a load
of 20 N/cm
2
decreases with increasing radiation dose
(Fig. 7). For unirradiated samples, testing is not
possible. For irradiated with small doses (irradiation
42 ISSN 1562-6016. ВАНТ. 2018. №5(117)
coefficient K = 17 and 15), the samples are broken in
2…3 min and 11 min, respectively.
Table 2
Influence of the irradiation coefficient on
the mechanical and electrical characteristics
of radiation-irradiated insulation of wire samples
(energy of accelerated electrons is 0.5 MeV)
Coeffi-
cient of
radiation
К
The
average
tensile
strength σ,
MPa
The
average
value of
the relative
elongation
at break
Δε, %
Insulation
resistance
Rins,
М∙km
Break-
down
voltage at
direct
current
Ubr, kV
0 (not
irradi-
ated)
10.6 241 97.1 20.5
17 11.6 179 208 23.5
15 12.2 170 208 –
13 11.6 165 177 24
11 12.7 144 238 –
10 13.4 144 203 –
9 12.8 144 214 27
8 12.7 150 217 23
7 13.0 138 252 –
6 13.3 144 197 25
5 13.2 138 217 26
4 13.3 119 173 21
0 0.05 0.1 0.15 0.2 0.25
10.5
11
11.5
12
12.5
13
13.5
1/K
,MPa
Fig. 3. Dynamics of changes depending on the dose
of irradiation of the tensile strength of halogen-free
filled insulation of wire samples
0 0.05 0.1 0.15 0.2 0.25
100
150
200
250
1/K
Fig. 4. Dynamics of changes depending on the dose
of irradiation of the relative elongation of halogen-free
filled insulation of wire samples
0 0.05 0.1 0.15 0.2 0.25
80
100
120
140
160
180
200
220
240
260
1/K
Rins, MOh.km
Fig. 5. Dynamics of changes depending on the
irradiation dose of insulation resistance of wire samples
with halogen-free filled insulation
0 0.05 0.1 0.15 0.2 0.25
19
20
21
22
23
24
25
26
27
1/K
Ubr, kV
Fig. 6. Dynamics of changes in the dose of irradiation
of breakdown voltage of wire samples with halogen-free
filled insulation
10
-1
0
20
40
60
80
100
1/K
K, m / (min A)
T=200 oC
Fig. 7. Effect of radiation dose on thermal deformation
of halogen-free filled insulation of wire samples
In Figs. 1–7 points show the experimental data, solid
lines – the experimental values of the parameters
processed using approximating splines.
CONCLUSIONS
For the first time, the effect of the technological
dose of irradiation on the mechanical and electrical
characteristics of composite halogen-free based on
ethylene vinyl acetate copolymer with a high filling of
flame retardant insulation wires was investigated.
Based on the results of mechanical tests, it is shown
that the electron energy at the level of 0.5 MeV provides
a higher degree of cross-linking of the polymer
insulation in comparison with the energy of 0.4 MeV at
the same values of the technological dose of irradiation,
the beam current and the number of passes of the wire
samples under the beam.
Rins, M∙km
Ubr, kV
°C
ISSN 1562-6016. ВАНТ. 2018. №5(117) 43
An increase in mechanical tensile strength,
insulation resistance and breakdown voltage at a
constant current with an increase in the irradiation dose
up to values of 0.15…0.2 has been established, which is
due to the cross-linking of a polymer matrix based on an
ethylene-vinyl acetate copolymer. At higher irradiation
dose values, destruction of the polymer matrix is
observed, which leads to a decrease in these
characteristics. The values of technological dose of
irradiation in the range 0.15…0.2 can be considered
optimal from the point of view of the process of cross-
linking of composite insulation with high insulation of
wires with an insulation thickness of 0.7 mm. At such
values of the radiation dose, the relative elongation of
the insulation remains at a level of not less than 120%,
which provides a compromise between the elasticity and
the and the rigidity of the wire.
These researches are of practical interest in the field
of creating cables for nuclear and thermal stations, wind
farms and solar power plants, ship cables, wires for on-
board systems. These are all products of increased
reliability and bear an increased load under extreme
operating conditions.
REFERENCES
1. M.R. Cleland. Power Electron Accelerators for
Industrial Radiation Processing of Polymers. New
York: Hanser Publishers, Munich and Oxford
University Press, 1992, 23 p.
2. N. Studer. Electron beam cross-linking of
insulated wire and cable: Process economics and
comparison with other technologies // Radiation
Physical Chemistry. 1990, N 35, p. 680-686.
3. EED-50-12 Statement of technical requirements
for electric cables thin-wall insulated, electron beam
cross-linked irradiated cables. Revision 2, 2014, 161 p.
4. E.E. Finkel, S.S. Leschenko, R.P. Braginsky.
Radiation chemistry and cable technology. M.:
“Atomizdat”, 1968, p. 313.
5. A.J. Berejka. Radiation response of industrial
materials: Dose-rate and morphology implications //
Nuclear Instruments and Methods in Physics Research.
2007, v. B 261, p. 86-89.
6. A.V. Bezprozvannych, E.V. Morozova, A.N. So-
kolenko. Influence of ionizing radiation on the
capacitance and tangent of the dielectric loss angle of
network cables // News of the National Technical
University “Kharkov Polytechnical Institute”. Series
“Energy: Reliability and Energy Efficiency”. 2003,
issue 9, v. 4, p. 3-8.
7. A.V. Bezprozvannych, B.G. Naboka, E.V. Moro-
zova. Radiation resistance of cables for general
industrial use // Electrical Engineering and
Electromechanics. 2006, N 3, p. 82-86.
8. A.V. Bezprozvannych, B.G. Naboka, E.V. Moro-
zov. Change in the mechanical properties of materials of
structural elements of optical cables under the influence
of radiation // News of the National Technical
University “Kharkov Polytechnical Institute”. Series
“Energy: Reliability and Energy Efficiency”. 2004, N 7,
p. 77-82.
9. R. Omar, L. Mireles, E. Eugene Shin,
С. Bowman, L. Vasudevan. Mixed Neutron and
Gamma-Ray Testing of Stirling-Alternator Candidate
Organic Materials. Joint Propulsion Conference &
Exhibit, 2010, 11 p.
10. IEC 60092–360:2014 Electrical installations in
ships – Part 360: Insulating and sheathing materials for
shipboard and offshore units, power, control,
instrumentation and telecommunication cables.
Edition 1.0, 2014, 54 p.
11. I.A. Mirchuk, A.V. Bezprozvannych. Substan-
tiation of the optimal long-term permissible operating
temperature of modern insulating compositions of ship
cables // News of the National Technical University
“Kharkov Polytechnical Institute”. Series “Energy:
Reliability and Energy Efficiency”. 2017, issue 9, v. 4,
p. 3-8.
12. Yu.A. Mikhaylin. Heat, Thermal and Fire
Resistance of Polymer Materials. Spb.: Scientific
foundations and technologies, 2011, p. 416.
Статья поступила в редакцию 10.05.2018 г.
ВЛИЯНИЕ ТЕХНОЛОГИЧЕСКОЙ ДОЗЫ ОБЛУЧЕНИЯ НА МЕХАНИЧЕСКИЕ
И ЭЛЕКТРИЧЕСКИЕ ХАРАКТЕРИСТИКИ ПОЛИМЕРНОЙ ИЗОЛЯЦИИ ПРОВОДОВ
А.В. Беспрозванных, И.А. Мирчук
Создание кабелей и проводов с полимерной изоляцией без содержания галогенов на основе сополимера
этиленвинилацетата с высоким содержанием антипиренов невозможно без радиационного
модифицирования свойств. На промышленном ускорителе заряженных частиц выполнено воздействие
ионизирующего излучения на образцы провода с медной жилой сечением 1,0 мм
2
и толщиной изоляции
0,7 мм. Показано влияние энергии электронов при одинаковых коэффициентах облучения на повышение
механической прочности изоляции при растяжении. Для энергии электронов 0,5 МэВ установлено
повышение механической прочности изоляции при растяжении на 27%, сопротивления изоляции – более
чем в два раза и пробивного напряжения – на 35% при оптимальной дозе облучения относительно
необлученного состояния.
44 ISSN 1562-6016. ВАНТ. 2018. №5(117)
ВПЛИВ ТЕХНОЛОГІЧНОЇ ДОЗИ ОПРОМІНЕННЯ НА МЕХАНІЧНІ І ЕЛЕКТРИЧНІ
ХАРАКТЕРИСТИКИ ПОЛІМЕРНОЇ ІЗОЛЯЦІЇ ПРОВОДІВ
Г.В. Безпрозваннних, І.А. Мірчук
Створення кабелів і проводів з полімерною ізоляцією без вмісту галогенів на основі сополімеру
етиленвінілацетату з високим вмістом антипіренів неможливо без радіаційного модифікування
властивостей. На промисловому прискорювачі заряджених частинок виконано вплив іонізуючого
випромінювання на зразки проводу з мідною жилою перетином 1,0 мм
2
і товщиною ізоляції 0,7 мм.
Показано вплив енергії електронів при однакових коефіцієнтах опромінення на підвищення механічної
міцності ізоляції при розтягуванні. Для енергії електронів 0,5 МеВ встановлено підвищення механічної
міцності ізоляції при розтягуванні на 27%, опору ізоляції – більш ніж в два рази і пробивної напруги – на
35% при оптимальній дозі опромінення щодо неопроміненого стану.
|
| id | nasplib_isofts_kiev_ua-123456789-147697 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1562-6016 |
| language | English |
| last_indexed | 2025-12-07T15:47:13Z |
| publishDate | 2018 |
| publisher | Національний науковий центр «Харківський фізико-технічний інститут» НАН України |
| record_format | dspace |
| spelling | Bezprozvannych, G.V. Mirchuk, I.A. 2019-02-15T17:52:22Z 2019-02-15T17:52:22Z 2018 Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires / G.V. Bezprozvannych, I.A. Mirchuk // Вопросы атомной науки и техники. — 2018. — № 5. — С. 40-44. — Бібліогр.: 12 назв. — англ. 1562-6016 https://nasplib.isofts.kiev.ua/handle/123456789/147697 621.319 Creation of cables and wires with polymer insulation without halogens based on ethylene vinyl acetate with a high content of fire retardants is impossible without radiation modification properties. On the industrial accelerator of charged particles, the effect of ionizing radiation on wires with a copper conductor cross section of 1.0 mm² and an insulation thickness of 0.7 mm is performed. The influence of the electron energy at identical irradiation factors on the increase in the mechanical strength of insulation during stretching is shown. For electron energy of 0.5 MeV, an increase in the mechanical strength of insulation at a tension of 27% was established, the insulation resistance more than doubled, and the breakdown voltage by 35% at the optimum radiation dose relative to the unirradiated state. Створення кабелів і проводів з полімерною ізоляцією без вмісту галогенів на основі сополімеру етиленвінілацетату з високим вмістом антипіренів неможливо без радіаційного модифікування властивостей. На промисловому прискорювачі заряджених частинок виконано вплив іонізуючого випромінювання на зразки проводу з мідною жилою перетином 1,0 мм² і товщиною ізоляції 0,7 мм. Показано вплив енергії електронів при однакових коефіцієнтах опромінення на підвищення механічної міцності ізоляції при розтягуванні. Для енергії електронів 0,5 МеВ встановлено підвищення механічної міцності ізоляції при розтягуванні - на 27%, опору ізоляції – більш ніж в два рази і пробивної напруги – на 35% при оптимальній дозі опромінення щодо неопроміненого стану Создание кабелей и проводов с полимерной изоляцией без содержания галогенов на основе сополимера этиленвинилацетата с высоким содержанием антипиренов невозможно без радиационного модифицирования свойств. На промышленном ускорителе заряженных частиц выполнено воздействие ионизирующего излучения на образцы провода с медной жилой сечением 1,0 мм² и толщиной изоляции 0,7 мм. Показано влияние энергии электронов при одинаковых коэффициентах облучения на повышение механической прочности изоляции при растяжении. Для энергии электронов 0,5 МэВ установлено повышение механической прочности изоляции при растяжении - на 27%, сопротивления изоляции – более чем в два раза и пробивного напряжения – на 35% при оптимальной дозе облучения относительно необлученного состояния. en Національний науковий центр «Харківський фізико-технічний інститут» НАН України Вопросы атомной науки и техники Физика радиационных повреждений и явлений в твердых телах Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires Вплив технологічної дози опромінення на механічні і електричні характеристики полімерної ізоляції проводів Влияние технологической дозы облучения на механические и электрические характеристики полимерной изоляции проводов Article published earlier |
| spellingShingle | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires Bezprozvannych, G.V. Mirchuk, I.A. Физика радиационных повреждений и явлений в твердых телах |
| title | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| title_alt | Вплив технологічної дози опромінення на механічні і електричні характеристики полімерної ізоляції проводів Влияние технологической дозы облучения на механические и электрические характеристики полимерной изоляции проводов |
| title_full | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| title_fullStr | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| title_full_unstemmed | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| title_short | Influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| title_sort | influence of technological dose of irradiation on mechanical and electrical characteristics of polymeric insulation of wires |
| topic | Физика радиационных повреждений и явлений в твердых телах |
| topic_facet | Физика радиационных повреждений и явлений в твердых телах |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/147697 |
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