Zifundise ukuthi ungakhetha kanjani i-epoxy resin elaphayo?

I-epoxy curing agent iyikhemikhali esetshenziselwa ukwelaphaama-epoxy resinsngokusabela ngamakhemikhali namaqembu e-epoxy ku-epoxy resin ukwakha isakhiwo esixhumene, ngaleyo ndlela yenza i-epoxy resin ibe yinto eqinile, eqinile eqinile.
Iqhaza eliyinhloko lama-epoxy therapy ejenti ukuthuthukisa ubulukhuni, ukumelana nemihuzuko, nokumelana namakhemikhali e-epoxy resins, okuwenza abe yimpahla ehlala isikhathi eside futhi eqinile, okuyingxenye ebalulekile yezinhlanganisela ze-epoxy pultruded. Lesi sihloko sabelana ngokuthi ungakhetha kanjani i-ejenti efanele yokwelapha i-epoxy ngokusekelwe ezintweni ezihlukene:
Ngokwezimo zokuphulukisa
- Ukwelapha ekamelweni lokushisa: Uma ukuphulukiswa ngokushesha ekamelweni lokushisa kuyadingeka, ama-aliphatic amine zokwelapha anjenge-ethylenediamine ne-diethylenetriamine angakhethwa; uma isivinini sokuphulukisa singadingeki ukuba sibe phezulu, futhi sigxile esikhathini sokusebenza, ama-agent okwelapha e-polyamide angakhethwa.
- Ukwelapha ukushisa: Ukumelana nokushisa okuphezulu kanye nezakhiwo zemishini, ama-amine amnandi elaphayo, njenge-diaminodiphenylsulfone (DDS), njll., angasetshenziswa; ekwelapheni okushesha kwezinga lokushisa eliphansi, ama-amine aguquliwe elapha ama-accelerator angacatshangelwa.
- Ukwelapha ngaphansi kwezimo ezikhethekile: ukwelapha endaweni enomswakama, i-ejenti yokwelapha ephulukisayo emanzi ingakhethwa; ngohlelo lokwelapha olukhanyayo, i-ejenti yokwelapha ene-photoinitiator ne-epoxy acrylate ingakhethwa.
Ngokwezidingo zokusebenza
- Izakhiwo zemishini: uma ubulukhuni obuphezulu namandla aphezulu, ama-anhydride elaphayo angakhethwa; uma kudingeka ukuguquguquka okuhle kanye nokumelana nomthelela, ama-ejenti okwelapha aqinile njengerabha ye-polysulfide afaneleka kakhulu.
- Ukumelana namakhemikhali: izidingo eziphezulu ku-asidi, i-alkali, nokumelana ne-solvent,i-phenolic resini-ejenti yokwelapha noma i-ejenti ethile eguquliwe yokwelapha i-amine ifaneleka kakhulu.
- Ukumelana nokushisa: Ezindaweni ezinezinga lokushisa eliphezulu, njengenhla kuka-200 ℃, i-ejenti yokwelapha ye-silicone noma i-ejenti yokwelapha enesakhiwo se-polyaromatic ingacatshangelwa.
Ngokusho kwemvelo yokusetshenziswa
- Imvelo yasendlini: izidingo eziphakeme zokuvikela imvelo, i-ejenti yokwelapha ye-epoxy esekelwe emanzini noma i-amine ephulukisayo ephansi ye-aliphatic amine ifaneleka kakhulu.
- Indawo yangaphandle: ukumelana nesimo sezulu esihle kuyadingeka, ama-alicyclic amine elaphayo anokumelana okuhle kwe-UV afaneleka kakhulu.
- Izindawo ezikhethekile: Ezindaweni ezinezidingo zenhlanzeko eziphezulu njengokudla nemithi, izinto zokwelapha i-epoxy ezingenabuthi noma ezinobuthi obuphansi njengama-ejenti okwelapha e-polyamide aqinisekisa ukuphepha kokudla kudingeka kukhethwe.
Cabangela izidingo zenqubo
- Isikhathi sokusebenza: Isikhathi eside sokusebenza, khetha i-ejenti yokwelapha ecashile, njenge-dicyandiamide, njll. Ukuze usebenze isikhashana nesikhathi sokwelapha, khetha ukwelapha okusheshayo kwe-aliphatic amine elapha.
- Ukubukeka Okuphulukisayo: Ukuze uthole ukubukeka okwelaphayo okungenambala nokusobala, khetha ama-alicyclic amine elapha ama-amine, njll. Ukuze uthole izimfuneko zombala ophansi, khetha ama-amine ajwayelekile zokwelapha anenani eliphansi.
Kuhlanganiswe nenani lezindleko
- Ngaphansi kwesisekelo sokuhlangabezana nezidingo zokusebenza, qhathanisa intengo nomthamo wama-ejenti ahlukene ezokwelapha. Intengo yama-ejenti ajwayelekile okwelapha i-amine iphansi uma kuqhathaniswa, kanti amanye ama-ejenti okwelapha akhethekile afana ne-fluorine-containing kanye nama-silicone aqukethe ama-ejenti okwelapha abiza kakhulu.