Gene ndi chiyaniral Makhalidwe a Polyethylene Resin
General Makhalidwe a Polyethylene Resin
Polyethylene utomoni ndi wopanda poizoni, wopanda fungo ufa woyera kapena granule, yoyera yamkaka m'mawonekedwe, ndi kumva ngati sera, ndi mayamwidwe otsika madzi, zosakwana 0.01%. Filimu ya polyethylene ndi yowonekera ndipo imachepa ndi kuwonjezeka kwa crystallinity. Filimu ya polyethylene imakhala ndi madzi otsika pang'ono koma kutsekemera kwa mpweya wambiri, komwe sikuli koyenera kusungirako mwatsopano koma koyenera kusungirako chinyezi. Imayaka, yokhala ndi index ya okosijeni ya 17.4, utsi wochepa ukayaka, madontho ochepa osungunuka, achikasu pamoto ndi buluu pansi, ndi fungo la parafini. Polyethylene ili ndi kukana madzi bwino. Pamwamba pa mankhwalawa ndi osakhala polar, ovuta kugwirizanitsa ndi kusindikiza, ndipo asinthidwa ndi chithandizo chapamwamba. Unyolo wambiri wanthambi uli ndi kukana koyipa kwa photodegradation ndi okosijeni.
Kulemera kwake kwa mamolekyulu kumakhala pakati pa 10,000 mpaka 100,000. Ngati molecular kulemera kuposa 100,000, ndi kopitilira muyeso-mkulu maselo kulemera polyethylene. The apamwamba maselo kulemera, bwino thupi ndi makina katundu, ndi kuyandikira mlingo chofunika cha zomangamanga zipangizo. Koma kulemera kwa mamolekyu kukakhala kokwera, m’pamenenso kumakhala kovuta kwambiri kukonza. Polyethylene ili ndi malo osungunuka a 100-130 ° C ndipo imakhala ndi kutentha kochepa kwambiri. Ikhoza kukhalabe ndi makina abwino pa -60 °C, koma kutentha kwa ntchito ndi 80 ~ 110 °C.
Sisungunuke muzosungunulira zilizonse zodziwika kutentha kwa chipinda, ndipo zimatha kusungunuka pang'ono mu toluene, amyl acetate, trichlorethylene ndi zosungunulira zina zopitilira 70 ° C.
Mphamvu Zamagetsi za Polyethylene Resin
Chifukwa polyethylene si polar, ili ndi magetsi abwino kwambiri okhala ndi kuchepa kwa dielectric komanso mphamvu yayikulu ya dielectric. Itha kugwiritsidwa ntchito ngati ma frequency module insulating material, corona-resistant pulasitiki, and high-voltage insulating material.
Thermal Properties
Kutentha kukana polyethylene si mkulu, ndipo bwino ndi kuwonjezeka wachibale maselo kulemera ndi crystallinity. Good otsika kutentha kukana, Chimaona kutentha akhoza jinirally kufika pansi -50 ℃; ndi kuwonjezeka kwa wachibale maselo misa, otsika kwambiri akhoza kufika -140 ℃. Mzere wokulirapo wa polyethylene ndi yayikulu, mpaka (20 ~ 24) × 10-5/K. Mkulu matenthedwe madutsidwe.