Crosslinked polyethylene: ntchito ndi makhalidwe

Polyethylene ndi zinthu zimene ntchito m'mafakitale zosiyanasiyana. Zamgululi ku izo amagwiritsidwa ntchito pa moyo wake. polyethylene Common akuzisunga mphamvu yake mpaka madigiri 130. Komabe, nthawi zambiri zofunikira kugwiritsa ntchito zinthu izi, ndi zinthu kwambiri pa kutentha ndi kuthamanga, mwachitsanzo mu dongosolo Kutentha ndi madzi otentha.

Kufunika zachititsa kuti apeze njira kupeza chuma cholimba. Anapeza luso choti crosslinked polyethylene lomwe lili ndi maselo kulemera lalikulu poyerekeza ndi zinthu ochiritsira, ndi bwino makhalidwe. Pogwirizanitsa kumvetsa njira imene chimagwirizanitsa mamolekyulu chifukwa mapangidwe mtanda olipira ogwirizana mu atatu azithunzi omwe tikunena gululi shirokoyacheistuyu.

Malinga ndi zotsatira ntchito kusiyanitsa mankhwala ndi crosslinking thupi. Zikatero, chitoliro (mtanda zogwirizana polyethylene ntchito kulenga zinthu deta) ndi irradiated ndi X-ray okhwima. Njira imeneyi imayenda kwambiri, ndipo mu miniti mukhoza kupeza mpaka mamita 80 zakuthupi.

A sangathe njira ndi kuti polyethylene crosslinked ali makulidwe m'goli wa chitoliro lapansi. Mu mkati mwa akutembenukira kuchuluka wotsikitsitsa mamolekyulu pawiri, ndi pa kunja M'malo mwake, wapamwamba. Choncho, katundu osiyana ndi katundu mu chochuluka. Chifukwa ndi crosslinked polyethylene gulu C (PEX).

Pamene ntchito njira mankhwala a m'malo maatomu wa hydrogen mu mamolekyulu ntchito yapadera mankhwala silane. Choncho, ndi silane crosslinked polyethylene. Mu kupanga mipope kudutsa osamba wapadera wodzazidwa ndi mankhwala. Zimenezi zimathandiza kuti yunifolomu crosslinking ndondomeko ya kali mkati ndi kunja kwa mpanda chitoliro mwakuya. Njira imeneyi zimathandiza kuti alandire chitoliro ndi amaposa wa processing ndiponso chuma chokhazikitsidwa PEX-B.

Pali njira processing ndi polyethylene asafe ankafuna kusintha zinthu mopitirira anachokera zinthu zinaperekedwa PEX-D. Komabe, njira imeneyi si applicable chifukwa Mwachangu otsika.

Mundisonyeze mtanda yolumikiza peroxides. Pankhaniyi, ndondomeko kupanga limapangidwa kuyanjana kwa peroxide ndi polyethylene, kenako boma lamkuwa ndi pansi mkulu kutentha analandira crosslinked polyethylene PEX-A gulu.

Conduits zipangizo (magulu B, C) ntchito madzi ndi magetsi, Koma iwo sangachite zambiri zomwe zikukhudza kulimba ndi mankhwala ductility.

The bwino kwambiri ndi mapaipi zopangidwa polyethylene gulu A, iwo ndi mkulu kutopa mphamvu osokoneza kukana, ooneka enieni bata, kutakasuka, kupirira kudabwitsa.

Kutentha mipope PEX ankagwiritsa ntchito yoti munthu, boma ndi kumanga mafakitale. Ndi thandizo lawo kunyamula Opunthira Redieta mawonekedwe ndi kulenga dongosolo pansi magetsi.