Ngaba i-epoxy yeglasi yefayibha yentonga inetyhefu?

I-epoxy resins kunye ne-epoxy resin adhesives ayinayo ityhefu, kodwa ngenxa yokongezwa kwezinyibilikisi kunye nezinye izinto eziyityhefu kwinkqubo yokulungiselela, ii-resin ezininzi ze-epoxy ke ngoko “zinetyhefu”. Kwiminyaka yakutshanje, ishishini lasekhaya le-epoxy resin lisebenzisa uguquko olusekwe emanzini ukunqanda ukudibanisa kunye nezinye iindlela zokugcina ubume be-epoxy resin. Okwangoku, uninzi lwee-epoxy resin zityabeka ezisekwe kwisinyibilikisi, eziqulathe isixa esikhulu seekhompawundi ezinobungozi (VOC), ezinetyhefu nezinokutsha, oko ke kubangele ukonakaliswa kwendalo kunye nomzimba womntu.

I-epoxy resin isetyenziswa ngokubanzi kunye nezongezo ukufumana ixabiso lesicelo. Izongezo zinokukhethwa ngokweenjongo ezahlukeneyo. Izongezo eziqhelekileyo ezisetyenziswayo zibandakanya ezi ndidi zilandelayo: (1) iarhente yokuphilisa; (2) isilungisi; (3) ukugcwalisa; (4) ukuthambisa; abanye.

Ngaba i-epoxy yeglasi yefayibha yentonga inetyhefu? Phakathi kwabo, iarhente yokuphilisa sisongezo. Nokuba isetyenziswa njenge-adhesive, yokugquma, okanye yokuhambisa, kufuneka yongezwe nge-arhente yokuphilisa, kungenjalo i-epoxy resin ayinakunyangeka. I-epoxy resins ngokubanzi ibhekisa kwiikhompawundi zepolymer eziqukethe amaqela epoxy amabini nangaphezulu kwimolekyuli. Ngaphandle kwabambalwa, izihlobo zabo zeemolekyuli zazo aziphezulu. Ubume beemolekyuli ze-epoxy resin zibonakaliswa liqela elisebenzayo le-epoxy kwityathanga leemolekyuli. Iqela le-epoxy linokufumaneka ekugqibeleni, embindini okanye kubume bokujikeleza kwetyathanga leemolekyuli. Ngenxa yokuba ulwakhiwo lweemolekyuli luqukethe amaqela epoxy asebenzayo, banokuthi bangene ekuphenduleni okunxibelelanisa ngeendlela ezahlukeneyo zokunyanga iiarhente zokwenza iipholima ezingenakunyibilika kunye ne-infusible ezinendlela ezintathu zenethiwekhi.

Ukusebenza kunye neempawu ze-epoxy resin

1. Iifom ezahlukeneyo. Ii-resins ezahlukeneyo, iiarhente zokunyanga, kunye neenkqubo zokuguqula zinokuphantse zilungelelane neemfuno zezicelo ezahlukeneyo kwifom, kwaye uluhlu lunokuvela kwi-viscosity esezantsi kakhulu ukuya kwindawo ephezulu yokunyibilika.

2. Ukunyanga okufanelekileyo. Khetha iindidi zeearhente ezahlukeneyo zokuphilisa, inkqubo ye-epoxy resin inokuphiliswa kwinqanaba lobushushu le-0 ~ 180 ℃.

3. Ukunamathela okunamandla. Amaqela e-polar hydroxyl kunye ne-ether bond kwi-molecular chain ye-epoxy resins yenza ukuba inamathele kakhulu kwizinto ezahlukeneyo. Ukuncipha kwe-epoxy resin kusezantsi xa unyanga, kwaye uxinzelelo lwangaphakathi oluvelisiweyo lincinci, olunceda ukuphucula amandla okubambelela.

4. Ukuncipha okuphantsi. Impendulo phakathi kwe-epoxy resin kunye ne-arhente yokuphilisa esetyenziswayo yenziwa ngokudibanisa ngokuthe ngqo okanye ukuvulwa kwendandatho yokuphendula kwamaqela epoxy kwimolekyuli ye-resin, kwaye akukho manzi okanye ezinye iimveliso ezivelayo. Xa kuthelekiswa nentlaka ye-polyester engafakwanga kunye ne-phenolic resins, zibonisa ukuncipha okuphantsi kakhulu (ngaphantsi kwe-2%) ngexesha lokunyanga.

5. Iipropati zoomatshini. Inkqubo ye-epoxy resin ephilisiweyo ineempawu ezintle kakhulu zoomatshini.

6, ukusebenza kombane. Inkqubo ye-epoxy resin ephilisiweyo yinto efanelekileyo yokubambelela ngeempawu eziphezulu ze-dielectric, ukumelana nokuvuza komhlaba kunye nokuxhathisa kwe-arc.

7. Ukuzinza kwemichiza. Ngokubanzi, inkqubo ye-epoxy resin ephilisiweyo inokumelana nealkali, ukumelana neasidi kunye nokumelana nesinyibilikisi. Njengezinye iipropathi zenkqubo ye-epoxy yonyango, uzinzo lweekhemikhali luxhomekeke kwi-resin ekhethiweyo kunye nakwiarhente yokunyanga. Ukukhetha ngokufanelekileyo i-epoxy resin kunye ne-arhente yokuphilisa kunokuyenza ibe nozinzo olukhethekileyo lweekhemikhali.

8. Uzinzo lwendalo. Indibaniselwano yeepropati ezingentla inika inkqubo ye-epoxy resin yokuma okuzinzileyo kunye nokuqina.

9, ukumelana nokungunda. Inkqubo ye-epoxy resin enyangiweyo ayinyangeki kwinkoliso yomngundo kwaye inokusetyenziswa kwimo yetropiki enzima.