Poyerekeza ndi zida zina, mapulasitiki ali ndi machitidwe asanu awa:
Kulemera kopepuka: Pulasitiki ndi chinthu chopepuka komanso kachulukidwe wachibale pakati pa 0.90 ndi 2.2.Chifukwa chake, kaya pulasitiki imatha kuyandama pamwamba pamadzi, makamaka pulasitiki ya thovu, chifukwa cha ma micropores omwe ali mmenemo, mawonekedwe ake ndi opepuka, ndipo kachulukidwe kake ndi 0,01.Katunduyu amalola kuti mapulasitiki agwiritsidwe ntchito popanga zinthu zomwe zimafuna kuchepetsa kulemera.
Kukhazikika kwamankhwala kwabwino: Mapulasitiki ambiri amakhala ndi kukana kwa dzimbiri kwamankhwala monga ma acid ndi alkalis.Makamaka polytetrafluoroethylene (F4) yomwe imadziwika kuti mfumu ya mapulasitiki, kukhazikika kwake kwa mankhwala kumakhala bwino kuposa golide, ndipo sikudzawonongeka ngati yophika mu "aqua regia" kwa maola oposa khumi.Chifukwa F4 ili ndi kukhazikika bwino kwa mankhwala, ndi chinthu choyenera kuti chisachite dzimbiri, monga F4 chitha kugwiritsidwa ntchito ngati zinthu zotumizira mapaipi amadzimadzi owononga komanso a viscous.
Kuchita bwino kwambiri kwamagetsi amagetsi: Mapulasitiki wamba ndi ma conductor osauka a magetsi, ndipo kukana kwawo komanso kukana kwa voliyumu ndikokulirapo, komwe kumatha kuwonetsedwa mu manambala mpaka 109-1018 ohms.Magetsi owonongeka ndi aakulu, ndipo mtengo wa dielectric tangent ndi wochepa.Chifukwa chake, mapulasitiki ali ndi ntchito zambiri m'mafakitale amagetsi ndi makina.
Ma conductor otsika kutentha amakhala ndi zotsatira zochepetsera phokoso komanso mayamwidwe owopsa: Nthawi zambiri, kutentha kwa mapulasitiki kumakhala kochepa, kofanana ndi 1/75-1/225 yachitsulo., kutsekereza bwino kwamawu komanso kukana kugwedezeka.Pankhani ya kutchinjiriza kwamafuta, mawindo apulasitiki agalasi amodzi ndi okwera 40% kuposa mawindo a aluminiyamu agalasi limodzi, ndipo mawindo agalasi awiri ndi 50% apamwamba.Pambuyo pawindo la pulasitiki likuphatikizidwa ndi galasi lotetezera, lingagwiritsidwe ntchito m'nyumba zogona, nyumba za maofesi, ma ward ndi mahotela, kupulumutsa kutentha m'nyengo yozizira komanso kupulumutsa ndalama zowononga mpweya m'chilimwe, ndipo phindu lake ndi loonekeratu.
Kugawidwa kwakukulu kwa mphamvu zamakina ndi mphamvu zenizeni zenizeni: mapulasitiki ena ndi olimba monga mwala ndi zitsulo, ndipo ena ndi ofewa monga mapepala ndi zikopa;kuchokera pamalingaliro azinthu zamakina monga kuuma, kulimba kwamphamvu, elongation ndi mphamvu zamapulasitiki, kugawa kosiyanasiyana, pali mwayi wosankha.Chifukwa cha mphamvu yokoka yaying'ono komanso mphamvu yayikulu ya pulasitiki, imakhala ndi mphamvu zapadera.Poyerekeza ndi zipangizo zina, mapulasitiki amakhalanso ndi zofooka zoonekeratu, monga kukhala kosavuta kuwotcha, osati kuuma kwambiri monga zitsulo, kusauka kwa ukalamba, komanso kusakhala ndi kutentha.
Nthawi yotumiza: Mar-19-2022