Koya muku yadda ake zaɓar wakilin warkar da epoxy resin?

Maganin warkar da epoxy wani sinadari ne da ake amfani da shi wajen warkar daresin epoxyta hanyar yin martani ta hanyar sinadarai tare da ƙungiyoyin epoxy a cikin resin epoxy don samar da tsari mai alaƙa da juna, don haka ya sa resin epoxy ya zama abu mai tauri da ɗorewa.
Babban aikin magungunan warkar da epoxy shine haɓaka tauri, juriyar gogewa, da juriyar sinadarai na resin epoxy, wanda hakan ke sanya su zama kayan da za su daɗe kuma masu ɗorewa, wanda wani ɓangare ne na haɗakar epoxy da aka ƙera. Wannan labarin ya raba yadda ake zaɓar wakilin warkar da epoxy da ya dace bisa ga dalilai daban-daban:
Dangane da yanayin warkarwa
- Warkewa a zafin ɗaki: Idan ana buƙatar warkewa cikin sauri a zafin ɗaki, za a iya zaɓar magungunan warkewa na aliphatic amine kamar ethylenediamine da diethylenetriamine; idan ba a buƙatar saurin warkewa ya zama mai yawa ba, kuma a mai da hankali kan lokacin aiki, za a iya zaɓar magungunan warkewa na polyamide.
- Magance zafi: Don juriya ga zafi da kuma halayen injiniya, ana iya amfani da sinadaran warkar da amine masu ƙanshi, kamar diaminodiphenylsulfone (DDS), da sauransu; don warkarwa cikin sauri mai ƙarancin zafi, ana iya la'akari da magungunan warkar da amine masu gyara tare da masu hanzartawa.
- Warkewa a ƙarƙashin yanayi na musamman: don warkewa a cikin yanayi mai danshi, ana iya zaɓar maganin warkewa mai danshi; don tsarin warkewa mai sauƙi, ana iya zaɓar maganin warkewa mai photoinitiator da epoxy acrylate.
Bisa ga buƙatun aiki
- Halayen Inji: idan ana buƙatar tauri mai yawa da ƙarfi mai yawa, ana iya zaɓar magungunan warkar da anhydride; idan ana buƙatar sassauci mai kyau da juriya ga tasiri, magungunan warkar da tauri kamar robar polysulfide sun fi dacewa.
- Juriyar sinadarai: babban buƙata a cikin juriyar acid, alkali, da narkewar abubuwa,resin phenolicmaganin warkarwa ko wani maganin warkarwa na amine da aka gyara ya fi dacewa.
- Juriyar Zafi: Ga yanayin zafi mai yawa, kamar sama da 200℃, ana iya la'akari da wakilin maganin silicone ko wakilin maganin warkarwa tare da tsarin polyaromatic.
Dangane da yanayin amfani
- Muhalli na cikin gida: buƙatun kariya daga muhalli masu yawa, maganin warkar da epoxy mai tushen ruwa ko maganin warkar da aliphatic amine mai ƙarancin canzawa ya fi dacewa.
- Muhalli a waje: ana buƙatar juriya mai kyau ga yanayi, magungunan warkar da alicyclic amine masu juriya ga UV sun fi dacewa.
- Muhalli na musamman: A cikin muhallin da ke da buƙatar tsafta kamar abinci da magani, ana buƙatar zaɓar magungunan warkar da epoxy marasa guba ko marasa guba kamar su magungunan warkar da polyamide waɗanda aka tabbatar da amincin abinci.
Yi la'akari da buƙatun tsari
- Lokacin aiki: Don tsawon lokacin aiki, zaɓi maganin warkarwa mai ɓoye, kamar dicyandaamide, da sauransu. Don ɗan gajeren lokaci na aiki da lokacin warkarwa, zaɓi maganin warkarwa mai sauri na aliphatic amine.
- Bayyanar Gyara: Domin samun bayyanar warkarwa mara launi da haske, zaɓi magungunan warkarwa na alicyclic amine, da sauransu. Don buƙatun launuka masu ƙarancin launi, zaɓi magungunan warkarwa na amine na yau da kullun masu rahusa.
Haɗe da factor na farashi
- A ƙarƙashin manufar biyan buƙatun aiki, a kwatanta farashi da yawan magungunan warkarwa daban-daban. Farashin magungunan warkarwa na amine na yau da kullun yana da ƙarancin yawa, yayin da wasu magungunan warkarwa na musamman kamar magungunan warkarwa masu ɗauke da fluorine da silicone sun fi tsada.