UV-229 na UV-B75 ni viŵiri vyakugwiriskira ntchito vya ultraviolet (UV) vyakukhazikika mu mafakitale gha polymer. Viŵiri ivi vyakukhazikika vikugwiriskirika nchito kuti vipangiske kuti ma polymers ghaleke kulimbana na UV radiation, ivyo vingapangiska kuti vinthu viŵe viheni pa katundu wakuwoneka na wa makina wa ma polima.
Nangauli ŵakuteŵetera chilato chimoza, pali vinyake ivyo vikupambana pakati pa UV-329 na UV-B75. Navi vinyake ivyo vikupambana:
1. Chilengedwe: UV-329 ni ya mbumba ya benzotriazole, apo UV-B75 ni chinthu chakufuma ku salicylate. Ici cikung’anamura kuti ŵali na vigaŵa vyakupambanapambana vya maselo, ivyo vikukhwaska umo vikugwilira nchito na kukolerana kwawo na ma polima ghakupambanapambana.
2. Kukolerana na ma polymers: UV-329 yikukolerana chomene na polyolefins, styrenics, na PVC, apo UV-B75 yikukolerana na mitundu yinandi ya ma polymers, kusazgapo PET, PBT, na polycarbonates.
3. UV absorption range: UV-329 yikugwira ntchito makora pakutora nkhongono za UV pakati pa 300-350 nm, apo UV-B75 yikugwira ntchito makora pakutora radiation ya UV pakati pa 280-320 nm.
4. Kuchita vinthu mu vigaŵa vyakupambanapambana: UV-329 yikukhazikika chomene pasi pa msinkhu wapachanya - temperature, ndiposo yikuchita makora mu malo gha asidi. Kumbali yinyake, UV-B75 yikukhazikika chomene pasi pa pH yikuru.
Paumaliro, wose UV-329 na UV-B75 ni vyakukhazikika vya UV vyakukhozga ivyo vikugwiriskirika nchito chomene mu mafakitale gha polymer. Kweni, kapangikiro kawo kakupambanapambana ka kemiko, kukolerana na ma polymers, UV absorption range, na kugwira ntchito mu vigaŵa vyakupambanapambana vikuŵapangiska kuŵa ŵakwenelera ku mapulogalamu ghakupambanapambana na mafakitale.
