- 29
- Sep
Sharaxaadda kala -saaridda fasalka ee guddiga dahaarka ee cusbi epoxy
Sharaxaadda kala -saaridda fasalka ee guddiga dahaarka ee cusbi epoxy
Rinjiga Epoxy wuxuu guud ahaan tixraacayaa xeryahooda polymer -ka dabiiciga ah oo ay ku jiraan laba ama in ka badan kooxaha epoxy -ga ee molecule -ka. In yar mooyaane, tirada kiimikooyinkooda qaraabada ahi ma sarreeyaan. Qaab -dhismeedka molecular ee cusbi epoxy waxaa lagu gartaa kooxda epoxy firfircoon ee silsiladda molecular. Kooxda epoxy waxay ku yaalliin dhamaadka, dhexda ama qaab dhismeedka meerto ee silsiladda molecular. Sababtoo ah qaab-dhismeedka molecular-ku wuxuu ka kooban yahay kooxo epoxy firfircoon, waxay la kulmi karaan fal-celin isku-xiridda ah oo leh noocyo kala duwan oo wakiilo daaweynaya si ay u sameeyaan polymers-ka aan milmin oo aan la karin karin oo leh qaab-dhismeed saddex-dhinac ah.
Astaamaha dalabka ee guddiga dahaarka resin epoxy
1. Qaabab kala duwan. Rinjiga kala duwan, wakiilada dawaynta, iyo hababka wax -ka -beddelka ayaa ku dhawaad la qabsan kara shuruudaha dalabyada kala duwan ee foomka, iyo kala -duwanaantu waxay noqon kartaa mid aad u hooseeya ilaa dhibco dhalaalaya oo sare.
2. Daaweyn habboon. Dooro wakiilo kala duwan oo wax -ka -qabad leh oo kala duwan, nidaamka cusbi ee epoxy ayaa ku dhawaad lagu daaweyn karaa xaddiga heerkulka 0 ~ 180 ℃.
3. Adhesion xoog leh. Kooxaha hydroxyl -ka dabaysha ku jira iyo xidhmooyinka ether ee silsiladda molecular ee resins epoxy waxay ka dhigaan mid aad ugu dheggan walxaha kala duwan. Hoos -u -dhaca resin epoxy -ku wuu hooseeyaa marka la daaweynayo, iyo walbahaarka gudaha ka dhashay waa yar yahay, kaas oo waliba gacan ka geysanaya hagaajinta xoogga dhegdhegga.
4. Hoos u dhaca. Dareen-celinta u dhexaysa cusbi epoxy iyo wakiilka dawaynta ee la adeegsado waxaa lagu sameeyaa falcelin toos ah oo toos ah ama falcelinta furitaanka polymerization ee kooxaha epoxy-ga ee molecule-ka cusbada, oo wax biyo ah ama badeecado kale oo aan degganayn lama sii daayo. Marka la barbardhigo maaddada polyester -ka aan la dhergin iyo reexaanta phenolic, waxay muujiyaan yaraanshaha aadka u hooseeya (in ka yar 2%) inta lagu jiro daaweynta.
5. Guryaha farsamada. Nidaamka cusbi ee bogsaday wuxuu leeyahay sifooyin farsamo oo aad u fiican.
6. Waxqabadka korontada. Nidaamka cusbi ee bogsaday ee la daaweeyey waa qalab aad u fiican oo dahaar leh oo leh astaamo koronto oo aad u sarreeya, iska caabin daadinta dusheeda, iyo iska caabinta arc.
7. Degganaanshaha kiimikada. Guud ahaan, nidaamka cusbi epoxy la bogsiiyey leeyahay iska caabin alkali aad u fiican, iska caabin acid iyo iska caabin dareeraha. Sida guryaha kale ee nidaamka epoxy -ka la daweeyey, xasiloonida kiimikadu waxay kaloo ku xidhan tahay cusbi la doortay iyo wakiilka dawaynta. Xulashada habboon ee resin epoxy iyo wakiilka dawaynta ayaa ka dhigi kara inay leedahay xasillooni kiimiko oo gaar ah.
8. Degganaanshaha cabbirka. Isku -darka qaar badan oo ka mid ah guryaha kor ku xusan waxay siinayaan nidaamka xabagta saliidda xasiloonida iyo cimri dherer aad u fiican.
9. U adkaysta caaryada. Nidaamka cusbi ee la daaweeyey wuxuu u adkaysan karaa caaryada badankood waxaana loo adeegsan karaa xaaladaha kulul ee kulul.
Nooc kala soocid
Marka loo eego qaab dhismeedka kelliyeedka, dhalada epoxy -ga ayaa qiyaastii loo qaybin karaa shan qaybood:
1. Glycidyl ether resin epoxy
2. Glycidyl ester epoxy resin
3. Glycidylamine resin epoxy
4. cusbi aliphatic epoxy resin
5. cusbi Alxyclic epoxy