Nthawi yoyamba yomwe PVC idapezeka mwangozi mu 1872 ndi wasayansi waku Germany, Eugen Baumann.Idapangidwa ngati botolo la vinyl chloride yomwe idasiyidwa padzuwa pomwe idapangidwa polima.
Chakumapeto kwa zaka za m'ma 1800 gulu la amalonda a ku Germany linaganiza zogulitsa ndi kupanga acetylene yambiri, yomwe imagwiritsidwa ntchito ngati mafuta mu nyali.Mofanana njira zamagetsi zidayamba kugwira ntchito bwino ndipo posakhalitsa zidadutsa msika.Ndi Acetylene iyi inalipo yochuluka komanso yotsika mtengo.
Mu 1912, katswiri wina wa zamankhwala wa ku Germany, Fritz Klatte, anayesa zinthuzo n’kuzigwira ndi hydrochloric acid (HCl).Izi zidzatulutsa vinyl chloride ndipo alibe cholinga chomveka chomwe adachisiya pa alumali.Vinyl chloride yopangidwa polima pakapita nthawi, Klatte anali ndi kampani yomwe anali kuigwirira ntchito, Greisheim Electron, kuti ipange patent.Iwo sanapeze ntchito iliyonse ndipo patent inatha mu 1925.
Modziyimira pawokha wasayansi wina ku America, Waldo Semon yemwe amagwira ntchito ku BF Goodrich, anali kupeza PVC.Adawona kuti zitha kukhala zida zabwino zopangira makatani osambira ndipo adalemba chiphaso.Chimodzi mwazinthu zazikulu chinali kutsekereza madzi komwe kunapangitsa kuti pakhale milandu yambiri yogwiritsira ntchito ndipo PVC idakula mwachangu pamsika.
Kodi PVC granule ndi chiyani ndipo imagwiritsidwa ntchito pati?
PVC ndi zopangira zomwe sizingasinthidwe zokha poyerekeza ndi zida zina.Mapangidwe a PVC granules amachokera ku kuphatikiza kwa polima ndi zowonjezera zomwe zimapereka mawonekedwe ofunikira kuti agwiritse ntchito kumapeto.
Msonkhano wojambulira zowonjezera zowonjezera zimatengera magawo pa zana la PVC resin (phr).Chophimbacho chimapangidwa ndi kusakaniza pamodzi zosakaniza, zomwe pambuyo pake zimasandulika kukhala gelled nkhani chifukwa cha kutentha (ndi kukameta ubweya).
Mankhwala a PVC amatha kupangidwa, pogwiritsa ntchito mapulasitiki, kukhala zinthu zosinthika, zomwe nthawi zambiri zimatchedwa P-PVC.Mitundu yofewa kapena yosinthika ya PVC imagwiritsidwa ntchito kwambiri pa nsapato, mafakitale a chingwe, pansi, payipi, chidole ndi kupanga magolovesi.
Mapangidwe opanda plasticizer olimba ntchito amasankhidwa U-PVC.PVC yolimba imagwiritsidwa ntchito kwambiri pamapaipi, mbiri yazenera, zokutira khoma, ndi zina zambiri.
PVC mankhwala ndi osavuta pokonza kudzera jekeseni akamaumba, extrusion, kuwomba akamaumba ndi kujambula kwambiri.INPVC apanga zosinthika PVC mankhwala ndi flowability mkulu kwambiri, abwino akamaumba jekeseni, komanso magiredi viscous kwambiri kwa extrusion.
Nthawi yotumiza: Jun-21-2021
