Dzina lazogulitsa:Polyirethane

Zosankha Zogulitsa:

Mankhwala:

Ma polyirethanes adapangidwa koyamba ndikufufuzidwa ndi Dr. Otto Bayar mu 1937. Polyirethane ndi polymer pomwe gawo lomwe limakhala ndi uretanet. Urethanes ndi zotumphukira za ma carbamic acid omwe amangokhala ngati mawonekedwe a esters. Ubwino waukulu wa pu ndikuti unyolo sunapangidwe ka ma atomu a kaboni koma m'malo mwake, mpweya ndi nayitrogeni [4]. Kwa mapulogalamu ogwiritsa ntchito mafakitale, polyhydroxyl amapanga. Mofananamo, mankhwala a nayitrogen ogwirira ntchito amatha kugwiritsidwa ntchito polumikizana. Mwa kusintha ndikusintha ma polyhydroxyl ndi polypununal mankhwala a nayitrogen, mafinya osiyanasiyana amatha kuphatikizidwa [15]. Polyesterte kapena polyther assure omwe ali ndi magulu a hydroxyl amagwiritsidwa ntchito kupanga polyesterror Polyteter-PU, motero [6]. Kusintha kwa kuchuluka kwa zolowa m'malo ndi kukwera pakati ndi kumapangidwe a nthambi kumatulutsa mafinya kuchokera ku mzere mpaka nthambi komanso yolimba. Mafinya a mzere amagwiritsidwa ntchito popanga ulusi ndikuwumba [6]. Mapulogalamu osinthika amagwiritsidwa ntchito popanga othandizira ndikukuphikira [5]. Zosinthika ndi zolimba zopukutira za pulasitiki, zomwe zimapangitsa mafinya ambiri omwe amapanga, imatha kupezeka m'makampani osiyanasiyana pa mafakitale [7]. Pogwiritsa ntchito minyewa yotsika maselo, opumira osiyanasiyana a chitukuko amatha kupangidwa. Gulu la hydroxyl la hydroxyl limalola kusintha mabatani, otchedwa magawo, kuti aikidwe mu unyolo. Kusintha m'magawo awa kumapangitsa kuti madigiri amphamvu ndi kuchuluka. Mabatani omwe amapereka gawo lokhwima la Rigid ndikukhala ndi wolemba unyolo amatchulidwa kuti ndi magawo 7]. Iwo omwe amapereka gawo la amorphous rubery ndi okhala ndi polyester / Polyther amatchedwa magawo ofewa. Pamalonda, izi tsekani ma polima amadziwika kuti mafinya ophatikizika

Ntchito:

Polyirethane polyirethane makamaka mawonekedwe a thermoplaty, omwe ali ndi bata bwino, kukana kwa mankhwala, kulimba ndi kumakina kuposa kusintha kwa PVC, ndi kusiyanasiyana kosiyanasiyana. Ili ndi kuteteza kwamitundu yabwino, kusokonekera, kukana mantha ndi anti-toicaties. Chifukwa chake, imagwiritsidwa ntchito ngati mabungwe, makulidwe omveka ndi kusema zinthu. Chiptiki chokhazikika cha polyurethane ndi chopepuka, chimamveka chipilala champhamvu, chotupa chamagetsi, kukana mankhwala, magetsi osavuta, ndi mayamwidwe amadzi. Amagwiritsidwa ntchito makamaka ngati zinthu zomangamanga, magalimoto, mpweya wabwino, kutentha kuyikapo komanso kukumbutsa. Polyurethane elastomer magwiridwe pakati pa pulasitiki ndi mphira, kukana mafuta, kuvala kutentha pang'ono, kukana kwamphamvu, kuuma kwakukulu. Amagwiritsidwa ntchito makamaka pamakampani opanga mabizinesi ndi makampani azachipatala. Polyurethane amathanso kutsatsa, zofukizira, zikopa zopangidwa, etc.