Uruhare rw'ibirwanya okisidasiyo mu kongera igihe cy'ubuzima bw'insinga zishyushya za polyethylene (XLPE)
Polyethylene ifatanye n'ibindi (XLPE)ni ibikoresho by'ingenzi bikingira ubushyuhe bikoreshwa mu nsinga zifite ingufu ziciriritse n'izifite ingufu nyinshi. Mu gihe cyose zikora, izi nsinga zihura n'ibibazo bitandukanye, birimo imiterere y'ikirere itandukanye, ihindagurika ry'ubushyuhe, imbaraga za mekanike, n'imikoranire ya shimi. Ibi bintu bigira ingaruka ku kuramba no kuramba kw'insinga.
Akamaro k'ibirwanya ogisijeni muri sisitemu ya XLPE
Kugira ngo insinga zishyushye za XLPE zikomeze gukora igihe kirekire, guhitamo antioxydant ikwiye muri sisitemu ya polyethylene ni ingenzi cyane. Antioxydants zigira uruhare runini mu kurinda polyethylene kwangirika kwa oxidative. Mu kwihutisha gukorana na radicals libre zikorwa muri ibyo bintu, antioxydants zigira ibintu bihamye kurushaho, nka hydroperoxides. Ibi ni ingenzi cyane kuko inzira nyinshi zo guhuza XLPE zishingiye kuri peroxide.
Uburyo bwo kwangirika kwa polimeri
Uko igihe kigenda gihita, polymer nyinshi zigenda zicika intege buhoro buhoro bitewe no kwangirika gukomeje. Impera y'ubuzima bwa polymers ikunze gusobanurwa nk'aho uburebure bwazo mu gihe cyo gucika bugabanuka bukagera kuri 50% by'agaciro k'umwimerere. Uretse iki gipimo, ndetse no gupfundika gato k'insinga bishobora gutuma zicika kandi zikananirwa. Amabwiriza mpuzamahanga akunze gukoresha iki gipimo kuri poliolefini, harimo na poliolefini zifatanye, kugira ngo harebwe imikorere y'ibikoresho.
Icyitegererezo cya Arrhenius cyo guhanura ubuzima bw'insinga
Isano iri hagati y'ubushyuhe n'igihe cy'ubuzima bw'insinga ikunze gusobanurwa hakoreshejwe ikigereranyo cya Arrhenius. Iyi moderi y'imibare igaragaza igipimo cy'ingaruka z'imiti mu buryo bukurikira:
K= D e(-Ea/RT)
Aho:
K: Igipimo cyihariye cy'ingaruka
D: Ihoraho
Ea: Ingufu zo gukora
R: Gazi ihoraho ya Boltzmann (8.617 x 10-5 eV/K)
T: Ubushyuhe busesuye muri Kelvin (Ubushyuhe burenze 273 muri °C)
Isubiwemo mu buryo bwa aljebra, ikigereranyo gishobora kugaragazwa nk'uburyo bukurikira: y = mx+b
Muri iki kigereranyo, ingufu zo gukora (Ea) zishobora guturuka hakoreshejwe amakuru y’amashusho, bigatuma habaho guhanura neza ubuzima bw’insinga mu bihe bitandukanye.
Ibipimo byihuse byo gusaza
Kugira ngo hamenyekane igihe insinga zishyushye za XLPE zimara, ingero z'ibizamini zigomba gukorerwa igerageza ryihuse ryo gusaza nibura ku bushyuhe butatu (cyangwa bune). Ubu bushyuhe bugomba kuba buri ku rugero ruhagije kugira ngo hamenyekane isano iri hagati y'igihe n'ubushyuhe. Ikigaragara ni uko ubushyuhe bwo hasi bugomba gutuma impuzandengo y'igihe kugeza ku iherezo ya nibura amasaha 5.000 kugira ngo amakuru y'ibizamini abe afatika.
Gukoresha ubu buryo buhamye no guhitamo antioxydants zikora neza, imikorere myiza n'uburambe bw'insinga zishyushya za XLPE bishobora kongerwa cyane.
Igihe cyo kohereza: Mutarama-23-2025