Kev Paub Txog Epoxy Resins thiab Epoxy Adhesives

(Kuv) Lub tswv yim ntawmepoxy resin

Epoxy resin yog hais txog cov qauv ntawm cov saw polymer uas muaj ob lossis ntau pawg epoxy hauv cov tshuaj polymer, uas yog cov thermosetting resin, thiab cov resin sawv cev yog bisphenol A hom epoxy resin.

(II) Cov yam ntxwv ntawm epoxy resins (feem ntau hu ua bisphenol A hom epoxy resins)

1. Tus nqi thov epoxy resin tus kheej yog qis heev, nws yuav tsum tau siv ua ke nrog tus neeg sawv cev kho kom muaj txiaj ntsig zoo.

2. Lub zog sib txuas siab: lub zog sib txuas ntawm cov nplaum epoxy resin yog nyob rau pem hauv ntej ntawm cov nplaum hluavtaws.

3. Kev kho kom qhuav me me, hauv cov nplaum epoxy resin nplaum shrinkage yog qhov me tshaj plaws, uas kuj yog epoxy resin nplaum curing nplaum siab ib qho ntawm cov laj thawj.

4. Kev tiv thaiv tshuaj lom neeg zoo: pawg ether, lub nplhaib benzene thiab pawg aliphatic hydroxyl hauv lub kaw lus kho tsis yooj yim raug kua qaub thiab alkali. Hauv dej hiav txwv, roj av, kerosene, 10% H2SO4, 10% HCl, 10% HAc, 10% NH3, 10% H3PO4 thiab 30% Na2CO3 siv tau ob xyoos; thiab hauv 50% H2SO4 thiab 10% HNO3 immersion ntawm chav tsev kub rau ib nrab xyoo; 10% NaOH (100 ℃) immersion rau ib hlis, qhov kev ua tau zoo tseem tsis hloov pauv.

5. Kev rwb thaiv hluav taws xob zoo heev: lub zog tawg ntawm epoxy resin tuaj yeem siab dua 35kv / hli 6. Kev ua haujlwm zoo, qhov loj me ntawm cov khoom ruaj khov, kev tiv taus zoo thiab kev nqus dej tsawg. Cov txiaj ntsig ntawm Bisphenol A-hom epoxy resin zoo, tab sis kuj muaj nws qhov tsis zoo: ①. Kev ua haujlwm viscosity, uas zoo li tsis yooj yim hauv kev tsim kho ②. Cov khoom kho yog brittle, elongation yog me me. ③. Lub zog tev tawv qis. ④. Kev tiv taus tsis zoo rau kev siv tshuab thiab thermal poob siab.

(III) daim ntawv thov thiab kev tsim kho ntawmepoxy resin

1. Keeb kwm kev loj hlob ntawm epoxy resin: epoxy resin tau thov rau Swiss patent los ntawm P.Castam hauv xyoo 1938, cov nplaum epoxy thaum ntxov tshaj plaws tau tsim los ntawm Ciba hauv xyoo 1946, thiab cov txheej epoxy tau tsim los ntawm SOCreentee ntawm Tebchaws Meskas hauv xyoo 1949, thiab kev tsim khoom lag luam ntawm epoxy resin tau pib hauv xyoo 1958.

2. Kev siv cov epoxy resin: ① Kev lag luam txheej: epoxy resin hauv kev lag luam txheej xav tau cov dej ntau tshaj plaws, cov hmoov txheej thiab cov txheej txheem khov kho tau siv dav dua. Siv tau dav hauv cov thawv xa dej, tsheb, nkoj, aerospace, electronics, cov khoom ua si, khoom siv tes ua thiab lwm yam lag luam. ② Kev lag luam hluav taws xob thiab hluav taws xob: cov nplaum epoxy resin siv tau rau cov ntaub ntawv rwb thaiv tsev hluav taws xob, xws li rectifiers, transformers, sealing potting; sealing thiab tiv thaiv cov khoom siv hluav taws xob; cov khoom siv hluav taws xob, rwb thaiv tsev thiab kev sib txuas; sealing thiab kev sib txuas ntawm cov roj teeb; capacitors, resistors, inductors, qhov chaw ntawm lub cloak. ③ Cov hniav nyiaj hniav kub, khoom siv tes ua, kev lag luam khoom siv kis las: siv tau rau cov cim, hniav nyiaj hniav kub, cov cim lag luam, kho vajtse, rackets, nuv ntses, khoom siv kis las, khoom siv tes ua thiab lwm yam khoom. ④ Kev lag luam Optoelectronic: siv tau rau encapsulation, sau thiab sib txuas ntawm lub teeb-emitting diodes (LED), cov raj digital, cov raj pixel, cov zaub hluav taws xob, LED teeb pom kev zoo thiab lwm yam khoom. ⑤Kev lag luam tsim kho: Nws kuj tseem yuav siv dav hauv kev, choj, pem teb, qauv hlau, kev tsim kho, txheej phab ntsa, pas dej tauv, kev tsim kho vaj tse, kev kho cov khoom qub txeeg qub teg thiab lwm yam lag luam. ⑥ Cov nplaum, cov khoom foob thiab cov khoom sib xyaw: xws li cov hniav cua tshuab, cov khoom siv tes ua, cov khoom siv av nplaum, iav thiab lwm yam kev sib txuas ntawm cov khoom, cov ntawv carbon fiber composite, cov khoom siv microelectronic sealing thiab lwm yam.

(IV) Cov yam ntxwv ntawmcov kua nplaum epoxy resin

1. Cov nplaum epoxy resin yog raws li cov yam ntxwv ntawm epoxy resin ntawm kev rov ua dua lossis kev hloov kho, yog li nws cov kev ua tau zoo raws li cov kev cai tshwj xeeb, feem ntau epoxy resin nplaum kuj yuav tsum muaj tus neeg sawv cev kho kom siv tau, thiab yuav tsum tau sib xyaw kom sib npaug kom kho tau tag nrho, feem ntau epoxy resin nplaum hu ua A kua nplaum lossis tus neeg sawv cev tseem ceeb, tus neeg sawv cev kho hu ua B kua nplaum lossis tus neeg sawv cev kho (hardener).

2. qhia txog cov yam ntxwv tseem ceeb ntawm cov nplaum epoxy resin ua ntej kho yog: xim, viscosity, lub ntiajteb txawj nqus tshwj xeeb, piv, lub sijhawm gel, lub sijhawm muaj, lub sijhawm kho, thixotropy (nres ntws), hardness, nto nro thiab lwm yam. Viscosity (Viscosity): yog qhov tsis kam sab hauv ntawm cov colloid hauv cov dej ntws, nws tus nqi yog txiav txim siab los ntawm hom tshuaj, kub, concentration thiab lwm yam.

Lub sijhawm siv gel: kev kho cov kua nplaum yog cov txheej txheem ntawm kev hloov pauv los ntawm kua mus rau solidification, txij thaum pib ntawm cov tshuaj tiv thaiv ntawm cov kua nplaum mus rau lub xeev tseem ceeb ntawm cov gel feem ntau yog lub sijhawm khov rau lub sijhawm gel, uas yog txiav txim siab los ntawm qhov sib tov ntawm cov kua nplaum epoxy resin, kub thiab lwm yam.

Thixotropy: Tus cwj pwm no hais txog lub colloid kov los ntawm sab nraud rog (co, stirring, vibration, ultrasonic waves, thiab lwm yam), nrog rau sab nraud quab yuam los ntawm tuab mus rau nyias, thaum cov yam ntxwv sab nraud kom nres lub luag haujlwm ntawm lub colloid rov qab mus rau qhov qub thaum qhov sib xws ntawm qhov tshwm sim.

Qhov nyuaj: hais txog qhov tsis kam ntawm cov khoom siv rau sab nraud xws li embossing thiab khawb. Raws li ntau txoj kev xeem Shore (Shore) hardness, Brinell (Brinell) hardness, Rockwell (Rockwell) hardness, Mohs (Mohs) hardness, Barcol (Barcol) hardness, Vickers (Vichers) hardness thiab lwm yam. Tus nqi ntawm qhov nyuaj thiab hom hardness tester cuam tshuam nrog cov feem ntau siv hardness tester, Shore hardness tester qauv yog yooj yim, haum rau kev tshuaj xyuas ntau lawm, Shore hardness tester tuaj yeem faib ua A hom, C hom, D hom, A-hom rau kev ntsuas mos colloid, C thiab D-hom rau kev ntsuas semi-hard thiab nyuaj colloid.

Kev nruj ntawm qhov chaw: qhov kev nyiam ntawm cov molecule hauv cov kua kom cov molecule ntawm qhov chaw ntawm sab hauv muaj lub zog, lub zog no ua rau cov kua ntau li ntau tau kom txo nws thaj chaw thiab tsim kom sib luag rau qhov chaw ntawm lub zog, hu ua qhov nro ntawm qhov chaw. Los yog qhov sib txhuam ntawm ob qhov chaw sib ze ntawm qhov chaw ntawm cov kua ib chav ntev, nws yog qhov tshwm sim ntawm lub zog molecular. Lub chav ntawm qhov nro ntawm qhov chaw yog N / m. Qhov loj ntawm qhov nro ntawm qhov chaw muaj feem cuam tshuam nrog qhov xwm txheej, kev huv thiab qhov kub ntawm cov kua.

3. qhia txog cov yam ntxwv ntawmcov kua nplaum epoxy resinTom qab kho cov yam ntxwv tseem ceeb yog: kev tiv taus, hluav taws xob, kev nqus dej, lub zog compressive, tensile (tensile) lub zog, shear lub zog, tev tawv lub zog, lub zog cuam tshuam, kub hloov pauv kub, kub hloov iav, kev ntxhov siab sab hauv, kev tiv taus tshuaj lom neeg, elongation, shrinkage coefficient, thermal conductivity, hluav taws xob conductivity, weathering, laus tiv taus, thiab lwm yam.

Kev Tiv Thaiv: Piav qhia txog cov yam ntxwv ntawm cov khoom siv tiv thaiv feem ntau nrog kev tiv thaiv ntawm qhov chaw lossis qhov ntim tiv thaiv. Kev tiv thaiv ntawm qhov chaw tsuas yog tib qho chaw ntawm ob lub electrodes ntsuas tus nqi tiv thaiv, chav tsev yog Ω. Cov duab ntawm lub electrode thiab tus nqi tiv thaiv tuaj yeem suav los ntawm kev sib txuas qhov tiv thaiv ntawm qhov chaw ib cheeb tsam. Kev tiv thaiv ntim, tseem hu ua ntim tiv thaiv, coefficient tiv thaiv ntim, hais txog tus nqi tiv thaiv los ntawm qhov tuab ntawm cov khoom siv, yog ib qho cim tseem ceeb los piav qhia txog cov khoom siv hluav taws xob ntawm dielectric lossis insulating cov ntaub ntawv. Nws yog ib qho cim tseem ceeb los piav qhia txog cov khoom siv hluav taws xob ntawm dielectric lossis insulating cov ntaub ntawv. 1cm2 dielectric tiv thaiv rau qhov xau tam sim no, chav tsev yog Ω-m lossis Ω-cm. qhov loj dua qhov tiv thaiv, qhov zoo dua qhov rwb thaiv tsev.

Qhov hluav taws xob pov thawj: tseem hu ua lub zog tiv taus hluav taws xob (lub zog rwb thaiv tsev), qhov siab dua qhov hluav taws xob ntxiv rau qhov kawg ntawm colloid, qhov ntau dua qhov them hauv cov khoom siv raug rau lub zog hluav taws xob, qhov ntau dua yuav ionize qhov kev sib tsoo, ua rau muaj kev tawg ntawm colloid. Ua kom lub insulator tawg ntawm qhov hluav taws xob qis tshaj plaws hu ua lub hom phiaj ntawm qhov hluav taws xob tawg. Ua kom 1 hli tuab insulating khoom tawg, xav tau ntxiv qhov hluav taws xob kilovolts hu ua insulating khoom rwb thaiv tsev withstand voltage zog, hu ua withstand voltage, chav tsev yog: Kv / mm. insulating khoom rwb thaiv tsev thiab kub muaj kev sib raug zoo. Qhov kub siab dua, qhov phem dua qhov kev ua haujlwm rwb thaiv tsev ntawm cov khoom rwb thaiv tsev. Txhawm rau kom ntseeg tau tias lub zog rwb thaiv tsev, txhua cov khoom rwb thaiv tsev muaj qhov kub siab tshaj plaws tso cai ua haujlwm, hauv qhov kub hauv qab no, tuaj yeem siv tau zoo rau lub sijhawm ntev, ntau dua qhov kub no yuav laus sai.

Kev nqus dejNws yog ib qho kev ntsuas ntawm qhov uas ib yam khoom nqus dej. Nws yog hais txog feem pua ​​​​​​ntawm qhov hnyav ntawm ib yam khoom uas tau muab tso rau hauv dej rau ib lub sijhawm ntawm qhov kub thiab txias.

Lub zog tensileLub zog tensile yog qhov siab tshaj plaws tensile thaum lub gel raug ncab kom tawg. Kuj tseem hu ua tensile force, tensile strength, tensile strength, tensile strength. Chav tsev yog MPa.

Lub zog txiav: tseem hu ua lub zog shear, hais txog thaj chaw sib txuas uas tuaj yeem tiv taus qhov siab tshaj plaws thauj khoom sib luag rau thaj chaw sib txuas, feem ntau siv chav ntawm MPa.

Lub zog tev tawv: tseem hu ua lub zog tev tawv, yog qhov siab tshaj plaws ntawm kev puas tsuaj rau ib chav dav uas tuaj yeem tiv taus, yog qhov ntsuas ntawm lub peev xwm ntawm kab ntawm lub zog, chav tsev yog kN / m.

Kev ntev: hais txog lub colloid hauv lub zog tensile nyob rau hauv qhov kev nqis tes ua ntawm qhov ntev ntawm qhov nce hauv qhov ntev thawj ntawm feem pua.

Kub ntawm qhov kub thiab txias: yog hais txog kev ntsuas qhov kub ntawm cov khoom siv kho, yog cov khoom siv kho uas muab tso rau hauv ib hom isothermal cua sov hloov pauv nruab nrab uas tsim nyog rau kev hloov pauv cua sov, hauv qhov thauj khoom zoo li qub ntawm hom nqaj hlau uas yooj yim txhawb nqa, ntsuas qhov kev hloov pauv ntawm cov qauv khoov kom ncav cuag tus nqi teev tseg ntawm qhov kub, uas yog, qhov kub hloov pauv, hu ua qhov kub hloov pauv cua sov, lossis HDT.

Kub hloov iav: hais txog cov khoom siv kho los ntawm daim iav mus rau qhov hloov pauv amorphous lossis siab elastic lossis kua dej (lossis qhov sib txawv ntawm qhov hloov pauv) ntawm qhov kub thiab txias nqaim ntawm qhov nruab nrab kwv yees, hu ua qhov kub hloov pauv iav, feem ntau qhia hauv Tg, yog qhov qhia txog kev tiv thaiv cua sov.

Kev txo qis: txhais tias yog feem pua ​​ntawm qhov sib piv ntawm kev ntsws rau qhov loj ua ntej ntsws, thiab ntsws yog qhov sib txawv ntawm qhov loj ua ntej thiab tom qab ntsws.

Kev ntxhov siab sab hauv: hais txog qhov tsis muaj zog sab nraud, cov colloid (khoom siv) vim muaj qhov tsis zoo, kev hloov pauv kub, cov kuab tshuaj, thiab lwm yam laj thawj rau kev ntxhov siab sab hauv.

Kev tiv thaiv tshuaj lom neeg: hais txog lub peev xwm los tiv taus cov kua qaub, alkalis, ntsev, cov kuab tshuaj thiab lwm yam tshuaj lom neeg.

Tiv thaiv nplaim taws: hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv kev sib xyaw thaum sib cuag nrog nplaim taws lossis cuam tshuam kev sib xyaw thaum nyob deb ntawm nplaim taws.

Kev tiv thaiv huab cua: hais txog cov khoom siv raug tshav ntuj, cua sov thiab txias, cua thiab nag thiab lwm yam huab cua.

Kev laus zuj zus: kho cov colloid hauv kev ua, khaws cia thiab siv cov txheej txheem, vim muaj cov yam ntxwv sab nraud (kub, lub teeb, oxygen, dej, rays, mechanical forces thiab chemical media, thiab lwm yam), ib qho kev hloov pauv ntawm lub cev lossis tshuaj, yog li ntawd cov khoom polymer crosslinking brittle, cracking nplaum, discoloration cracking, rough blistering, nto chalking, delamination flaking, qhov kev ua tau zoo ntawm qhov maj mam deterioration ntawm cov khoom siv kho tshuab ntawm qhov poob ntawm qhov poob ntawm qhov tsis tuaj yeem siv, qhov xwm txheej no hu ua kev laus. Qhov xwm txheej ntawm qhov kev hloov pauv no hu ua kev laus.

Dielectric tas mus li: tseem hu ua tus nqi capacitance, tus nqi induced (Permittivity). Hais txog txhua "unit volume" ntawm cov khoom, hauv txhua unit ntawm "potential gradient" tuaj yeem txuag "electrostatic zog" (Electrostatic Zog) ntawm ntau npaum li cas. Thaum lub colloid "permeability" ntau dua (uas yog, qhov phem dua qhov zoo), thiab ob qho ze rau cov xov hlau tam sim no ua haujlwm, qhov nyuaj dua los ncav cuag cov nyhuv ntawm kev rwb thaiv tsev tiav, hauv lwm lo lus, qhov ntau dua yuav tsim qee qib ntawm kev xau. Yog li ntawd, dielectric tas li ntawm cov khoom rwb thaiv tsev feem ntau, qhov me dua qhov zoo dua. Lub dielectric tas li ntawm dej yog 70, me ntsis noo noo, yuav ua rau muaj kev hloov pauv tseem ceeb.

4. feem ntau ntawm covcov kua nplaum epoxy resinyog cov nplaum uas ua kom sov, nws muaj cov yam ntxwv tseem ceeb hauv qab no: qhov kub siab dua qhov kho sai dua; qhov sib xyaw ntawm qhov ntau dua qhov kho sai dua; cov txheej txheem kho muaj qhov tshwm sim exothermic.

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