Kodi thermosetting resin ndi chiyani?
Thermosetting resin kapena thermosetting resin ndi polima yomwe imachiritsidwa kapena kupangidwa kukhala yolimba pogwiritsa ntchito njira zochiritsira monga kutentha kapena ma radiation.Kuchiritsa ndi njira yosasinthika.Imawoloka netiweki ya polima kudzera mu mgwirizano wamankhwala.
Pambuyo pakuwotcha, zinthu zopangira thermosetting zimakhalabe zolimba mpaka kutentha kumafika kutentha komwe kumayamba kutsika.Makinawa amatsutsana ndi mapulasitiki a thermoplastic.Zitsanzo zingapo za resins thermosetting ndi:
Phenolic utomoni
- Amino utomoni
- Polyester utomoni
- Silicone utomoni
- Epoxy utomoni, ndi
- Polyurethane utomoni
Pakati pawo, epoxy resin kapena phenolic resin ndi imodzi mwazinthu zodziwika bwino za thermosetting.Masiku ano, amagwiritsidwa ntchito kwambiri popanga zinthu zopangidwa mwaluso komanso zapadera.Chifukwa cha kulimba kwawo komanso kuuma kwawo (chifukwa cha kuphatikizika kwawo kwakukulu), amakhala pafupifupi oyenera kugwiritsa ntchito kulikonse.
Ndi mitundu iti ikuluikulu ya ma epoxy resins omwe amagwiritsidwa ntchito muzinthu zophatikizika?
Mitundu itatu ikuluikulu ya ma epoxy resins omwe amagwiritsidwa ntchito popanga zinthu zambiri ndi awa:
- Phenolic aldehyde glycidyl ether
- Onunkhira glycidyl amine
- Cyclic aliphatic mankhwala
Kodi zinthu zazikulu za epoxy resin ndi ziti?
Talemba pansipa zofunikira zomwe zimaperekedwa ndi epoxy resin.
- Mphamvu zapamwamba
- Mtengo wochepa wochepa
- Imamatira bwino ku magawo osiyanasiyana
- Kugwiritsa ntchito mphamvu zamagetsi
- Chemical resistance ndi zosungunulira kukana, komanso
- Mtengo wotsika komanso kawopsedwe wochepa
Ma epoxy resins ndi osavuta kuchiza ndipo amagwirizana ndi magawo ambiri.Ndizosavuta kunyowetsa pamwamba ndipo ndizoyenera kwambiri kugwiritsa ntchito zinthu zophatikizika.Epoxy resin imagwiritsidwanso ntchito kusintha ma polima angapo, monga polyurethane kapena polyester wosaturated.Iwo kumapangitsanso thupi ndi mankhwala katundu.Kwa thermosetting epoxy resins:
- Kuchuluka kwamphamvu kumayambira 90 mpaka 120MPa
- Mitundu yamakomedwe modulus ndi 3100 mpaka 3800MPa
- Kutentha kwa magalasi (Tg) ndi 150 mpaka 220 ° C
Utomoni wa epoxy uli ndi zovuta ziwiri zazikulu, zomwe ndi brittleness komanso kumva kwamadzi.
Nthawi yotumiza: Jan-29-2024
