An increase of the mechanical strength and hardness of polymeric materials radiation-crosslinked by X-ray radiation from an gaseous electric discharge

G K Novikov,A I Smirnov,V V Fedchishin

doi:10.35164/0554-2901-2019-11-12-7-9

Abstract

The problem of investigation of mechanical and electrophysical properties of polymeric materials crosslinked by X-ray radiation from a gaseous electric discharge is considered. The effect of radiation crosslinking on the mechanical strength and hardness of polymers is presented by the example of samples of various thicknesses (from 0.08 mm to 10 mm) of LDPE and HDPE made using crosslinking technology by X-ray radiation from a barrier gaseous electric discharge proposed in [1]. Experimental data obtained on samples of low molecular weight LDPE-107-02K and high molecular weight HDPE-271-82K made in the form of dumbbell, cut in accordance with GOST IEC 60811-2-1 from PE plates, are considered. To study the electrophysical properties and the depth of semi-absorption of X-ray radiation from gaseous electric discharge, LDPE and HDPE samples in the form of disks of different thicknesses were used.The depth of penetration of X-ray radiation from a gaseous discharge into LDPE-107-02K and HDPE-271-82K was estimated.Comparative studies of changes in the electrophysical properties of mechanical strength and hardness of cable LDPE under the influence of X-ray radiation from gaseous discharge and under the influence of an electron beam are carried out.It is shown that the mechanical strength and hardness of LDPE and HDPE can be increased by at least 30% and 60% respectively via radiation crosslinking by X-ray from a gaseous discharge.

Highlights

The problem of investigation of mechanical and electrophysical properties of polymeric materials crosslinked by X-ray radiation from a gaseous electric discharge is considered
It is shown that the mechanical strength and hardness of LDPE and HDPE can be increased by at least 30% and 60% respectively via radiation crosslinking by X-ray from a gaseous discharge
Что радиационное сшивание полиэтилена низкой плотности (ПЭНП) и полиэтилена высокой плотности (ПЭВП) при определенных режимах облучения рентгеновским излучением электрического газового разряда (ЭГР) позволяет увеличить выход гель-фракции, механическую прочность и твердость радиационно сшиваемых полимеров приблизительно на 40 60%

Summary

Introduction

The problem of investigation of mechanical and electrophysical properties of polymeric materials crosslinked by X-ray radiation from a gaseous electric discharge is considered. В работах [3 8] показано, что рентгеновское излучение ЭГР вызывает в полимерных кабельных диэлектриках обратимые и необратимые изменения электрофизических и механических свойств, аналогичные вызванным действием электронного пучка (обратимая радиационная электропроводность, обратимые радиационные изменения электретной поляризации, спектров токов термостимулированной деполяризации ТСД, механический радиационный эффект памяти формы, адгезионный поверхностный эффект склеивания и т.д.). Результаты определения δ1/2 для образцов ПЭНП разной толщины, облученных рентгеновским излучением ЭГР различной жесткости, представлены на рис.

Results

Conclusion