Ukusetyenziswa kwezincamathelisi ze-epoxy resin

I-epoxy resin adhesive(ebizwa ngokuba yi-epoxy adhesive okanye i-epoxy adhesive) yavela malunga nowe-1950, iminyaka engaphezu kwama-50 kuphela. Kodwa phakathi kwenkulungwane yama-20, inkolelo-mbono yokuncamathelisa eyahlukeneyo, kunye nekhemistri yokuncamathelisa, i-rheology yokunamathela kunye nendlela yomonakalo wokunamathela kunye neminye imisebenzi yophando olusisiseko iqhubekile, kangangokuba iipropati zokuncamathelisa, iintlobo ngeentlobo kunye nokusetyenziswa kwazo zenze inkqubela phambili ngokukhawuleza. I-epoxy resin kunye nenkqubo yayo yokunyanga kunye nokusebenza kwayo okugqwesileyo kunye ne-epoxy resin entsha, i-arhente yokunyanga entsha kunye nezongezo ziyaqhubeka zivela, ziba ludidi lwezincamathelisi ezibalulekileyo ezisebenza kakuhle, iintlobo ngeentlobo, kunye nokuzivumelanisa ngokubanzi.
I-epoxy resin adhesive ukongeza kwiiplastiki ezingezizo ze-polar ezifana ne-polyolefin bonding ayilunganga, kwiintlobo ngeentlobo zezinto zesinyithi ezifana ne-aluminium, intsimbi, isinyithi, ubhedu: izinto ezingezizo zesinyithi ezifana neglasi, umthi, ikhonkrithi, njl.njl.: kunye neeplastiki ze-thermosetting ezifana ne-phenolics, i-aminos, i-polyester engagcwaliyo, njl.njl. zineempawu ezibalaseleyo zokuncamathelisa, ngoko ke kukho i-adhesive yendalo yonke eyaziwa ngokuba yi-. I-epoxy adhesive yi-adhesive yolwakhiwo lwe-epoxy resin enzima.
Uhlu ngokweemeko zokuphilisa
Iglu yokuncamathelisa ebandayo (iglu yokuncamathelisa engenabushushu). Yahlulwe yangala:

• Iglu yokuncamathelisa eshushu ephantsi, ubushushu bokuncamathelisa <15 ℃;
• Iglu yokuncamathelisa yobushushu begumbi, ubushushu bokuncamathelisa yi-15-40 ℃.
• Iglu yokuncamathelisa ubushushu. Ingahlulwahlulwa ngakumbi ibe:
• Iglu yokuncamathelisa yobushushu obuphakathi, ubushushu bokuncamathelisa malunga ne-80-120 ℃;
• Iglu yokuncamathelisa eshushu kakhulu, ubushushu bokuncamathelisa > 150 ℃.
• Ezinye iindlela zokuncamathelisa, ezifana ne-adhesive ekhaphukhaphu, i-adhesive emanzi kunye ne-adhesive ecoca amanzi, i-adhesive efihlakeleyo.

Izincamathelisi ze-Epoxy zinezibonelelo ezilandelayo ngaphezu kwezinye iintlobo zezincamathelisi:

1. I-resin ye-epoxyIqulethe iindidi ezahlukeneyo zamaqela e-polar kunye neqela le-epoxy elisebenza kakhulu, ngoko ke inamandla okuncamathelisa anamandla aneentlobo ngeentlobo zezinto ze-polar ezifana nesinyithi, iglasi, isamente, umthi, iiplastiki, njl.njl., ingakumbi ezo zinomsebenzi ophezulu womphezulu, kwaye kwangaxeshanye amandla adibeneyo ezinto ezicociweyo ze-epoxy nawo makhulu kakhulu, ngoko ke amandla ayo okuncamathelisa aphezulu kakhulu.
2. Akukho zi-volatiles eziphantsi ze-molecular eziveliswayo xa i-epoxy resin inyangwa. Ukuncipha komthamo womaleko wokuncamathelisa kuncinci, malunga ne-1% ukuya kwi-2%, enye yeentlobo ezinokuncipha okuncinci kokulungisa kwii-resin ze-thermosetting. Emva kokongeza i-filler ingancitshiswa ibe ngaphantsi kwe-0.2%. I-coefficient yokwandiswa okuthe ngqo kwezinto ezinyangwayo ze-epoxy nayo incinci kakhulu. Ke ngoko, uxinzelelo lwangaphakathi luncinci, kwaye alunampembelelo ingako kumandla okubopha. Ukongeza, ukuqhekeka kwezinto ezinyangwayo ze-epoxy kuncinci, ngoko ke uzinzo olulinganayo lomaleko wokunamathela lulungile.
3. Kukho iintlobo ngeentlobo zee-epoxy resins, ii-curing agents kunye nee-modifiers, ezinokwenziwa ngokufanelekileyo nangobuchule ukuze kwenziwe i-glue enokusebenza okufunekayo (njengokucocwa ngokukhawuleza, ukucocwa kobushushu begumbi, ukucocwa kobushushu obuphantsi, ukucocwa emanzini, ukuxinana okuphantsi, ukuxinana okuphezulu, njl.njl.), kunye nokusetyenziswa okufunekayo kokusebenza (njengokuxhathisa ubushushu obuphezulu, ubushushu obuphantsi, amandla aphezulu, ukuguquguquka okuphezulu, ukumelana nokwaluphala, ukucocwa kombane, ukucocwa kwemagnethi, ukucocwa kobushushu, njl.njl.).
4. Ngeentlobo ngeentlobo zezinto eziphilayo (i-monomer, i-resin, irabha) kunye nezinto ezingaphiliyo (ezifana nezizalisi, njl.njl.), zinokuhambelana kakuhle kunye nokusebenza kwakhona, kulula uku-copolymerization, ukuxutywa, ukuxuba, ukuzalisa kunye nezinye iinguqulelo ukuphucula ukusebenza komaleko wokuncamathelisa.
5. Ukumelana nokugqwala okuhle kunye neempawu ze-dielectric. Ukumelana ne-asidi, i-alkali, ityuwa, izinyibilikisi kunye nezinye izinto ezibangela ukugqwala. Ukumelana nomthamo yi-1013-1016Ω-cm, amandla e-dielectric yi-16-35kV/mm.
6. Ii-epoxy resins ezisetyenziselwa iinjongo ngokubanzi, ii-ejenti zokuphilisa kunye nezongezo zinemvelaphi emininzi, imveliso enkulu, kulula ukuyila, inokuba yi-contact pressure molding, ingasetyenziswa ngomlinganiselo omkhulu.

Indlela yokukhethai-epoxy resin

Xa ukhetha i-epoxy resin, kukho izinto ezininzi ekufuneka ziqwalaselwe, kuquka:

1. Ukusetyenziswa: Ngaba i-epoxy ingasetyenziselwa injongo ngokubanzi okanye ukusetyenziswa ngakumbi kwemizi-mveliso?
2. Ixesha lokusebenza: Kuza kufuneka i-epoxy isetyenziswe ixesha elingakanani ngaphambi kokuba inyibilike?
3. Ixesha Lokunyanga: Kuza kuthatha ixesha elingakanani ukuba imveliso inyangeke ize inyangeke ngokupheleleyo kusetyenziswa i-epoxy?
4. Ubushushu: Inxalenye iza kusebenza kubushushu obungakanani? Ukuba uphawu lufunwa, ngaba i-epoxy ekhethiweyo ivavanyiwe ukuze ibone ukuba ingakanani na iqondo lobushushu?

Iimpawu:

• Iipropati eziphezulu ze-thixotropic, zingasetyenziswa ekwakheni i-façade.
• Iimpawu eziphezulu zokhuseleko lokusingqongileyo (inkqubo yokunyanga engenazo izinyibilikisi).
• Ukuguquguquka okuphezulu.
• Amandla aphezulu okubopha.
• Ubushushu obuphezulu bombane.
• Iipropati ezibalaseleyo zoomatshini.
• Ukumelana kakuhle nobushushu kunye namanzi.
• Uzinzo oluhle kakhulu lokugcina, ixesha lokugcina ukuya kuthi ga kunyaka omnye.

Isicelo:Ukubopha iintlobo ngeentlobo zeesinyithi kunye neesinyithi ezingezizo ezesinyithi, ezinje ngeemagnethi, ii-alloys ze-aluminium, ii-sensors, njl.