I-Epoxy Resin

1,Intshayelelo

I-epoxy resin idla ngokusetyenziswa kunye nezongezo. Izongezo zingakhethwa ngokweendlela ezahlukeneyo zokusetyenziswa. Izongezo eziqhelekileyo ziquka i-Agent yokuNyanga, i-Moderifier, i-Filler, i-Diluent, njl.

I-arhente yokunyanga sisongezo esiyimfuneko. Ingaba i-epoxy resin isetyenziswe njenge-adhesive, i-coating, i-castable, i-ejenti yokunyanga kufuneka yongezwe, ngaphandle koko ayinakunyangwa. Ngenxa yeemfuno ezahlukeneyo zesicelo kunye nokusebenza, kukho iimfuno ezahlukeneyo ze-epoxy resin, i-arhente yokunyanga, i-modifier, i-filler, i-diluent kunye nezinye izongezo.

2,Ukukhethwa kwe-Epoxy Resin

(1) Khetha ngokosetyenziso

① Xa isetyenziswe njenge-adhesive, kungcono ukhethe i-resin enexabiso eliphakathi le-epoxy (0.25-0.45);

② Xa isetyenziswe njenge-castable, kungcono ukhethe i-resin enexabiso eliphezulu le-epoxy (0.40);

③ Xa isetyenziswe njengengubo, i-resin enexabiso eliphantsi le-epoxy (<0.25) ikhethwa ngokubanzi.

(2) Khetha ngokweMechanical Strength

Amandla anxulumene neqondo lokuwela. Ixabiso le-epoxy liphezulu, kwaye idigri ye-crosslinking nayo iphezulu emva kokunyanga. Ixabiso le-epoxy liphantsi kwaye idigri ye-crosslinking iphantsi emva kokunyanga. Ixabiso elahlukileyo le-epoxy liya kubangela amandla ahlukeneyo.

① I-resin enexabiso eliphezulu le-epoxy inamandla aphezulu kodwa i-brittle;

② I-resin enexabiso eliphakathi le-epoxy inamandla amahle kwiqondo lokushisa eliphezulu neliphantsi;

③ I-resin enexabiso eliphantsi le-epoxy inamandla amabi kwiqondo lokushisa eliphezulu.

(3) Khetha ngokweeMfuno zokuSebenza

① Kwabo abafuni ukumelana nobushushu obuphezulu kunye namandla, banokukhetha i-resin enexabiso eliphantsi le-epoxy elinokoma ngokukhawuleza kwaye akukho lula ukulahleka.

② Kwabo bafuna ukunyanzeliswa okulungileyo kunye namandla, banokukhetha i-resin enexabiso eliphezulu le-epoxy.

3,Ukukhethwa kweArhente yokuNyanga

(1) Uhlobo lwe-Arhente yokuNyanga:

Iiarhente eziqhelekileyo zokunyanga i-epoxy resin ziquka i-aliphatic amine, i-alicyclic amine, i-amine enuka kamnandi, i-polyamide, i-anhydride, i-resin kunye ne-tertiary amine. Ukongeza, phantsi kwefuthe le-photoinitiator, i-UV okanye ukukhanya kunokwenza ukuba i-epoxy resin inyangwe. Iarhente yokunyanga i-amine iqhele ukusetyenziselwa ubushushu begumbi okanye ukunyanga ubushushu obuphantsi, ngelixa i-anhydride kunye nearhente yokunyanga enevumba elimnandi ziqhele ukusetyenziselwa ukufudumeza ukunyanga.

(2) Umthamo we-Agent yokunyanga

① Xa i-amine isetyenziswa njenge-arhente edibanisayo, ibalwa ngolu hlobo lulandelayo:

Idosi ye-amine = MG / HN

M = ubunzima bemolekyuli ye-amine;

HN = inani le-hydrogen esebenzayo;

G = ixabiso le-epoxy (i-epoxy ilingana nge-100 g ye-epoxy resin)

Uluhlu lokutshintsha alukho ngaphezu kwe-10-20%. Ukuba iphiliswe nge-amine eninzi, i-resin iya kuba brittle. Ukuba idosi incinci kakhulu, ukunyanga akugqibelelanga.

② Xa i-anhydride isetyenziswa njenge-agent edibanisayo, ibalwa ngolu hlobo lulandelayo:

Umthamo we-anhydride = MG (0.6 ~ 1) / 100

M = ubunzima bemolekyuli ye-anhydride;

G = ixabiso le-epoxy (0.6 ~ 1) ngumlinganiso wokulinga.

(3) UmGaqo wokuKhetha uMmeli wokuNyanga

① Iimfuno zoMsebenzi.

Ezinye zifuna ukumelana nobushushu obuphezulu, ezinye zifuna ukuguquguquka, kwaye ezinye zifuna ukuxhathisa okulungileyo kokuhlwa. I-arhente yokunyanga efanelekileyo ikhethwa ngokweemfuno ezahlukeneyo.

② Indlela yokunyanga.

Ezinye iimveliso azikwazi ukufudumeza, ngoko i-agent ephilisayo yokunyanga ukushisa ayikwazi ukukhethwa.

③ Ixesha lesicelo.

Ixesha elibizwa ngokuba lixesha lesicelo libhekisela kwixesha elivela kwixesha apho i-epoxy resin yongezwa kunye ne-ejenti yokunyanga ukuya kwixesha elingenakusetyenziswa. Ukusetyenziswa ixesha elide, i-anhydrides okanye i-latent curing agents zisetyenziswa ngokubanzi.

④ Ukhuseleko.

Ngokubanzi, iarhente yokunyanga enetyhefu encinci ingcono kwaye ikhuselekile kwimveliso.

⑤ Iindleko.

4,UKhetho lwesilungisi

Impembelelo yesilungisi kukuphucula ukusukwa, ukuxhathisa ukucheba, ukuxhathisa ukugoba, ukuxhathisa impembelelo kunye nokusebenza kokufakwa kwe-epoxy resin.

(1) IiModyuli eziqhelekileyo kunye neempawu

① Irabha yePolysulfide: phucula amandla empembelelo kunye nokumelana nokuxobuka;

② I-Polyamide resin: ukuphucula i-brittleness kunye nokubambelela;

③ Utywala bePolyvinyl TERT butyraldehyde: phucula ukuxhathisa ukusulwa kwempembelelo;

④ I-NBR: phucula ukunganyangeki kolusu;

⑤ I-phenolic resin: phucula ukumelana nobushushu kunye nokumelana nokugqwala;

⑥ I-polyester resin: phucula ukuxhathisa ukuvela kwempembelelo;

⑦ Urea formaldehyde melamine resin: ukwandisa ukumelana neekhemikhali kunye namandla;

⑧ I-resin ene-Furfural: phucula ukusebenza kokugoba okumileyo, phucula ukuxhathisa kweasidi;

⑨ I-Vinyl resin: phucula ukuxhathisa ukuxobuka kunye namandla empembelelo;

⑩ Isocyanate: ukunciphisa ukunyameka komswakama kunye nokwandisa ukumelana kwamanzi;

11 ISilicone: phucula ukumelana nobushushu.

(2) Umthamo

① Irabha yePolysulfide: 50-300% (kunye ne-agent yokunyanga);

② I-Polyamide resin kunye ne-phenolic resin: 50-100%;

③ I-polyester resin: 20-30% (ngaphandle kwe-arhente yokunyanga, okanye inani elincinci le-arhente yokunyanga ukukhawulezisa ukusabela.

Ngokubanzi, okukhona isilungisi sisetyenziswa, kokukhona ukuguquguquka okukhulu, kodwa ubushushu bokutshintsha kwe-thermal yeemveliso ze-resin buyancipha ngokufanelekileyo. Ukuze kuphuculwe ukuguquguquka kwe-resin, i-toughening agents ezifana ne-dibutyl phthalate okanye i-dioctyl phthalate zihlala zisetyenziswa.

5,Ukukhethwa kweziFilisi

Umsebenzi wokuzalisa kukuphucula ezinye iimpawu zeemveliso kunye neemeko zokutshatyalaliswa kobushushu be-resin yokunyanga. Inokunciphisa inani le-epoxy resin kunye nokunciphisa iindleko. Iifayile ezahlukeneyo zingasetyenziselwa iinjongo ezahlukeneyo. Kufuneka ibe ngaphantsi kwe-100 mesh, kwaye i-dosage ixhomekeke kwisicelo sayo. Izihluzi eziqhelekileyo zezi zilandelayo:

(1) Ifayibha ye-asbestos kunye nefayibha yeglasi: ukwandisa ukuqina kunye nokumelana nempembelelo;

(2) Umgubo wequartz, umgubo weporcelain, umgubo wentsimbi, isamente, i-emery: ukwandisa ubulukhuni;

(3) I-alumina kunye ne-porcelain powder: ukwandisa amandla okubambelela kunye namandla omatshini;

(4) I-asbestos powder, i-silica gel powder kunye ne-samente yobushushu obuphezulu: ukuphucula ukumelana nobushushu;

(5) I-asbestos powder, i-quartz powder kunye nomgubo wamatye: ukunciphisa izinga lokunciphisa;

(6) Umgubo we-aluminium, umgubo wobhedu, umgubo wentsimbi kunye nezinye iipilisi zetsimbi: ukwandisa ukuqhutyelwa kwe-thermal kunye ne-conductivity;

(7) Ipowder yegraphite, i-talc powder kunye ne-quartz powder: ukuphucula ukusebenza okuchasene nokunxiba kunye nokusebenza kokuthambisa;

(8) I-Emery kunye nezinye iibrasives: ukuphucula ukusebenza okuchasene nokunxiba;

(9) I-Mica powder, i-porcelain powder kunye ne-quartz powder: ukwandisa ukusebenza kwe-insulation;

(10) Zonke iintlobo zeebala kunye negraphite: ezinombala;

Ukongezelela, ngokweenkcukacha, isixa esifanelekileyo (27-35%) se-P, As, Sb, Bi, Ge, Sn kunye ne-Pb oxides ezongeziweyo kwi-resin inokugcina ukunamathela phantsi kobushushu obuphezulu kunye noxinzelelo.

6,Ukukhethwa kweDiluent

Umsebenzi we-diluent kukunciphisa i-viscosity kunye nokuphucula ukugqithiswa kwe-resin. Inokwahlulwa ibe ngamacandelo amabini angasebenziyo kwaye asebenzayo, kwaye isixa ngokubanzi asikho ngaphezu kwama-30%. I-diluents eziqhelekileyo ziquka i-diglycidyl ether, i-polyglycidyl ether, i-propylene oxide butyl ether, i-propylene oxide phenyl ether, i-dicyclopropane ethyl ether, i-triethoxypropane propyl ether, i-inert diluent, i-xylene, i-toluene, i-acetone, njl.

7,IiMfuneko zezinto eziphathekayo

Phambi kokongeza i-ejenti yokunyanga, zonke izinto ezisetyenzisiweyo, ezinje nge-resin, i-ejenti yokunyanga, isihluzi, isilungisi, i-diluent, njl.njl., kufuneka ihlolwe, eya kuthi ihlangabezane nezi mfuno zilandelayo:

(1) Akukho manzi: izinto ezinamanzi zifanele zomiswe kuqala, yaye izinyibilikisi ezinomlinganiselo omncinane wamanzi zifanele zisetyenziswe kancinane kangangoko kunokwenzeka.

(2) Ubunyulu: umxholo wokungcola ngaphandle kwamanzi kufuneka ube ngaphantsi kwe-1%. Nangona isenokusetyenziswa kunye ne-5% -25% yobumdaka, ipesenti yezinye izixhobo kwifomula kufuneka yandiswe. Kungcono ukusebenzisa i-reagent grade kwixabiso elincinci.

(3) Ixesha lokuSebenza: Kuyimfuneko ukwazi ukuba izinto eziphathekayo azivumelekanga.