Iyini i-resin ye-thermosetting?
I-resin ye-thermosetting noma i-thermosetting resin iyi-polymer eselashwayo noma ebunjwe ibe yisimo esiqinile kusetshenziswa izindlela zokuphulukisa ezifana nokushisisa noma imisebe.Inqubo yokwelapha iyinqubo engenakuhlehliswa.Ihlanganisa inethiwekhi ye-polymer ngokusebenzisa isibopho samakhemikhali esihlangene.
Ngemuva kokufudumeza, okokusebenza kwe-thermosetting kuhlala kuqinile kuze kube yilapho izinga lokushisa lifinyelela izinga lokushisa lapho iqala ukwehla khona.Lo mshini uphambene nepulasitiki ye-thermoplastic.Izibonelo ezimbalwa ze-thermosetting resins yilezi:
I-Phenolic resin
- I-amino resin
- I-polyester resin
- I-Silicone resin
- Epoxy resin, futhi
- I-polyurethane resin
Phakathi kwazo, i-epoxy resin noma i-phenolic resin ingenye yezinhlobo ezivame kakhulu ze-thermosetting.Kulezi zinsuku, zisetshenziswa kabanzi ekusetshenzisweni kwezinto ezibonakalayo nezikhethekile eziyinhlanganisela.Ngenxa yamandla abo aphezulu nokuqina (ngenxa yokuxhumanisa kwawo okuphezulu), cishe afaneleka kunoma yisiphi isicelo.
Yiziphi izinhlobo eziyinhloko zama-epoxy resins asetshenziswa ezintweni ezihlanganisiwe?
Izinhlobo ezintathu eziyinhloko zama-epoxy resins asetshenziswa ekusetshenzisweni kwempahla eyinhlanganisela yilezi:
- I-Phenolic aldehyde glycidyl ether
- I-amine glycidyl amine
- I-cyclic aliphatic compounds
Yiziphi izici ezibalulekile ze-epoxy resin?
Sibhale ngezansi izakhiwo ezibalulekile ezinikezwe i-epoxy resin.
- Amandla aphezulu
- Izinga lokushwabana eliphansi
- Inamathela kahle kuma-substrates ahlukahlukene
- Ukufakwa ugesi okusebenzayo
- Ukumelana namakhemikhali nokumelana ne-solvent, kanye
- Izindleko eziphansi kanye nobuthi obuphansi
Ama-epoxy resins kulula ukwelapha futhi ahambisana nama-substrates amaningi.Kulula ukumanzisa ingaphezulu futhi afaneleka ngokukhethekile ekusetshenzisweni kwezinto ezibonakalayo eziyinhlanganisela.I-epoxy resin iphinde isetshenziselwe ukuguqula ama-polymer amaningana, njenge-polyurethane noma i-polyester engasetshenzisiwe.Bathuthukisa izakhiwo zabo zomzimba namakhemikhali.Nge-thermosetting epoxy resins:
- Ibanga lamandla e-tensile lisuka ku-90 liye ku-120MPa
- Ububanzi be-tensile modulus yi-3100 kuya ku-3800MPa
- Izinga lokushisa lokushintsha kwengilazi (Tg) liyi-150 kuya ku-220 ° C
I-Epoxy resin inezithiyo ezimbili eziyinhloko, okungukuthi i-brittleness yayo kanye nokuzwela kwamanzi.
Isikhathi sokuthumela: Jan-29-2024
