Nkhani

Mapepala a polyethylene izi zili choncho chifukwa nthawi zina maunyolo a mamolekyu amatseka makristalo awo, ndikusiya dera lalikulu lopanda mawonekedwe mu biomolecule, ma polyethylene plates amatha kuyamwa mphamvu zambiri za impact kinetic. Malinga ndi zomwe zanenedwa, njira ya ASTM-D256 imagwiritsidwa ntchito kudziwa momwe mphamvu ya pulasitiki imakhudzira. Malinga ndi kuyerekeza, mphamvu ya polyethylene board ingagawidwe mu polycarbonate, polycarbonate imadziwika ndi kukana kwake impact, ndipo ingagwiritsidwe ntchito ngati zinthu za rabara wamba.

Kukana kukangana kwa mbale ya polyethylene ndi kochepa kwambiri. Bolodi ya polyethylene ili ndi kukana bwino kukangana, kukana kukangana kochepa komanso kunyowa bwino. Ndi zinthu zodziwika bwino zopangira bushing, roller ndi bushing. Kusankha bolodi ya polyethylene ngati friction pair, sikuti kungowonjezera nthawi yogwirira ntchito yowonongeka ya malo, komanso board ya polyethylene komanso kungathandize kusunga ndalama.

Bolodi la polyethylene lili ndi kukana kwabwino kwa mankhwala. Bolodi la polyethylene lili ndi kukana kwabwino kwa mankhwala. Kuwonjezera pa nitric acid yokhazikika ndi sulfuric acid, bolodi la polyethylene silili losavuta kujambulidwa mu yankho lililonse la alkaline kapena acidic. Lingagwiritsidwe ntchito ngati hydrochloric acid yochepetsedwa pa 80℃, mu sodium cyanide & LT; Hydrochloric acid & lt; 75% yosalala, lingagwiritsidwenso ntchito ndi madzi ndi kuyeretsa madzi. Monga momwe aliyense akudziwira, bolodi la polyethylene ndi losavuta kutupa mu aliphatic hydrocarbons kapena halogenates (makamaka kutentha kosalekeza), kotero chisamaliro chiyenera kuperekedwa pakugwiritsa ntchito kwake.

Kukweza kukana kwa polyethylene board. Kukana kwa kuvala kwambiri ndi chimodzi mwa zinthu zomwe zimakopa, polyethylene board m'mapulojekiti ambiri pogwiritsa ntchito phindu lofunika kwambiri. Pa gawoli, pulasitiki yonse ya polyethylene board imakhala ndi kukana kwabwino kwa kuvala, ndipo ngakhale zipangizo zambiri zachitsulo sizili bwino monga kale. Pamene kulemera kwa molekyulu ya polyethylene yopanikizika kwambiri kukukwera, kukana kwa kuvala kwa mtundu uwu wa zinthu kumakulanso. Kukana kwa kuvala kwa polyethylene board. Mphamvu yokakamiza ya polyethylene plate imagwirizana ndi kulemera kwake kwa molekyulu. Pamene kulemera kwa molekyulu kuli kochepera 2 miliyoni, mphamvu yokakamiza ya polyethylene plate imawonjezeka ndi kuwonjezeka kwa kulemera kwa molekyulu, ndipo mtengo wake ndi pafupifupi 2 miliyoni. Pakadali pano, mphamvu yokakamiza ya kuvala imachepa ndi kuwonjezeka kwa kulemera kwa molekyulu.