Utomoni wa phenolicndi zinthu zopangidwa ndi polima zopangidwa ndi ma phenols (monga phenol) ndi aldehydes (monga formaldehyde) zomwe zimasungunuka pogwiritsa ntchito asidi kapena base catalysis. Zili ndi mphamvu yabwino kwambiri yolimbana ndi kutentha, kutchinjiriza kutentha komanso kugwiritsa ntchito mphamvu zamagetsi ndipo zimagwiritsidwa ntchito pamagetsi, magalimoto, ndege ndi zina.
Phenolic resin (Phenolic Resin) ndi utomoni wopangidwa womwe wakhala ukugwiritsidwa ntchito m'mafakitale. Umapangidwa ndi condensation reaction ya phenol kapena zotumphukira zake (monga cresol, xylenol) ndi formaldehyde. Malinga ndi mtundu wa catalyst (acidic kapena alkaline) ndi chiŵerengero cha zipangizo zopangira, ukhoza kugawidwa m'magulu awiri: thermoplastic ndi thermosetting.
Makhalidwe Aakulu Makhalidwe Athupi:
1. Nthawi zambiri imakhala yolimba yopanda mtundu kapena yachikasu yowonekera bwino ya bulauni. Zinthu zomwe zimapezeka m'masitolo nthawi zambiri zimawonjezera utoto kuti ziwonetse mitundu yosiyanasiyana.
2. Ili ndi kukana kutentha kwambiri ndipo ingagwiritsidwe ntchito kwa nthawi yayitali pa kutentha kwa 180℃. Imapanga mpweya wotsalira wambiri (pafupifupi 50%) pa kutentha kwakukulu.
3. Makhalidwe ogwira ntchito:
Choteteza magetsi bwino kwambiri, choletsa moto (palibe chifukwa chowonjezera zinthu zoletsa moto) komanso chokhazikika muyeso.
Ili ndi mphamvu zambiri zamakanika, koma ndi yofooka komanso yosavuta kuyamwa chinyezi.
4. Kugawa ndi kapangidwe kake Thermoplastic phenolic resin : Kapangidwe ka mzere, kamafuna kuwonjezera mankhwala ochiritsa (monga hexamethylenetetramine) ku crosslink ndi kuchiritsa.
5. Kukonza kutenthaUtomoni wa Phenol-formaldehydeKapangidwe ka maukonde olumikizirana, kamatha kuchiritsidwa ndi kutentha, kali ndi kukana kutentha kwambiri komanso mphamvu yamakina
Utomoni wa phenolic umagwiritsidwa ntchito makamaka popanga mapulasitiki osiyanasiyana, zokutira, zomatira ndi ulusi wopangidwa.
Nthawi yotumizira: Julayi-17-2025
