(I) Lub tswvyim ntawmepoxy cob
Epoxy resin yog hais txog cov qauv saw hlau muaj ob lossis ntau dua epoxy pawg hauv cov khoom sib xyaw polymer, belongs rau cov thermosetting resin, tus neeg sawv cev resin yog bisphenol A hom epoxy resin.
(II) Cov yam ntxwv ntawm epoxy resins (feem ntau hu ua bisphenol A hom epoxy resins)
1. Tus kheej epoxy resin daim ntawv thov tus nqi qis heev, nws yuav tsum tau siv nrog rau kev kho tus neeg sawv cev kom muaj txiaj ntsig zoo.
2. High bonding zog: lub zog sib txuas ntawm epoxy resin nplaum yog nyob rau pem hauv ntej ntawm hluavtaws nplaum.
3. Curing shrinkage yog me me, nyob rau hauv cov nplaum epoxy resin adhesive shrinkage yog qhov tsawg tshaj plaws, uas tseem yog epoxy resin adhesive curing adhesive siab ib qho ntawm cov laj thawj.
4. Cov tshuaj tiv thaiv zoo: cov ether pawg, benzene nplhaib thiab aliphatic hydroxyl pawg hauv cov txheej txheem kho tsis yooj yim eroded los ntawm acid thiab alkali. Hauv dej hiav txwv, roj av, kerosene, 10% H2SO4, 10% HCl, 10% HAc, 10% NH3, 10% H3PO4 thiab 30% Na2CO3 tuaj yeem siv tau ob xyoos; thiab nyob rau hauv 50% H2SO4 thiab 10% HNO3 immersion ntawm chav tsev kub rau ib nrab xyoo; 10% NaOH (100 ℃) immersion rau ib lub hlis, qhov kev ua tau zoo tseem tsis hloov.
5. Cov khoom siv hluav taws xob zoo heev: qhov tawg ntawm epoxy resin tuaj yeem ua tau ntau dua 35kv / mm 6. Cov txheej txheem kev ua tau zoo, cov khoom loj ruaj khov, kev ua haujlwm zoo thiab kev nqus dej tsawg. Bisphenol A-type epoxy resin zoo yog qhov zoo, tab sis kuj muaj nws qhov tsis zoo: ①. Kev khiav hauj lwm viscosity, uas zoo li yuav tsis yooj yim rau kev tsim kho ②. Cov khoom kho yog nkig, elongation yog me me. ③. Tsawg peel zog. ④. Tsis zoo tiv thaiv mechanical thiab thermal shock.
(III) daim ntawv thov thiab kev loj hlob ntawmepoxy cob
1. Cov keeb kwm kev loj hlob ntawm epoxy resin: epoxy resin tau thov rau Swiss patent los ntawm P.Castam xyoo 1938, qhov ntxov tshaj plaws epoxy nplaum yog tsim los ntawm Ciba hauv 1946, thiab epoxy txheej yog tsim los ntawm SOCreentee ntawm lub teb chaws USA xyoo 1949, thiab industrialized zus tau tej cov epoxy resin tau pib nyob rau hauv 1958.
2. Daim ntawv thov ntawm epoxy resin: ① Txheej kev lag luam: epoxy resin hauv kev lag luam txheej yuav tsum muaj cov txheej txheem dej ntau tshaj plaws, cov hmoov coatings thiab cov txheej txheem siab yog siv ntau dua. Nws tuaj yeem siv dav hauv cov thawv ntim, tsheb, nkoj, aerospace, electronics, khoom ua si, khoom siv tes ua thiab lwm yam lag luam. ② kev lag luam hluav taws xob thiab hluav taws xob: epoxy resin nplaum tuaj yeem siv rau cov khoom siv hluav taws xob rwb thaiv tsev, xws li rectifiers, transformers, sealing potting; sealing thiab tiv thaiv cov khoom siv hluav taws xob; electromechanical khoom, rwb thaiv tsev thiab kev sib txuas; sealing thiab sib txuas ntawm cov roj teeb; capacitors, resistors, inductors, nto ntawm lub cloak. ③ Kub hniav nyiaj hniav kub, khoom siv tes ua, khoom ua kis las kev lag luam: tuaj yeem siv rau cov paib, cov hniav nyiaj hniav kub, cov cim lag luam, khoom siv kho vajtse, rackets, nuv ntses tackle, khoom ntaus pob tesniv, khoom siv tes ua thiab lwm yam khoom. ④ Optoelectronic kev lag luam: nws yuav siv tau rau encapsulation, filling thiab bonding ntawm lub teeb-emitting diodes (LED), cov hlab, pixel tubes, electronics, LED teeb thiab lwm yam khoom. ⑤ Kev tsim kho kev lag luam: Nws tseem yuav tau siv dav hauv txoj kev, choj, pem teb, steel qauv, kev tsim kho, phab ntsa txheej, pas dej ua ke, kev tsim kho vaj tse, kev kho kab lis kev cai thiab lwm yam lag luam. ⑥ Adhesives, sealants thiab composites teb: xws li cua turbine blades, handicrafts, ceramics, iav thiab lwm yam kev sib txuas ntawm cov khoom, carbon fiber sheet composite, microelectronic cov ntaub ntawv sealing thiab lwm yam.
(IV) Cov yam ntxwv ntawmepoxy resin nplaum
1. epoxy resin adhesive yog raws li epoxy resin yam ntxwv ntawm reprocessing los yog hloov kho, yog li ntawd nws cov kev ua tau zoo tsis nyob rau hauv txoj kab nrog rau cov kev cai tshwj xeeb, feem ntau epoxy resin nplaum kuj yuav tsum muaj ib tug curing tus neeg sawv cev nyob rau hauv thiaj li yuav siv, thiab yuav tsum tau. sib xyaw ua ke txhawm rau txhawm rau kho kom zoo, feem ntau epoxy resin nplaum hu ua A kua nplaum lossis tus neeg sawv cev tseem ceeb, tus neeg sawv cev kho lub npe hu ua B kua nplaum lossis tus neeg saib xyuas (hardener).
2. xav txog cov yam ntxwv tseem ceeb ntawm epoxy resin nplaum ua ntej kho yog: xim, viscosity, tshwj xeeb lub ntiajteb txawj nqus, piv, gel lub sij hawm, muaj lub sij hawm, curing lub sij hawm, thixotropy (stop flow), hardness, nto nro thiab lwm yam. Viscosity (Viscosity): yog qhov kev sib txhuam sab hauv ntawm cov colloid hauv cov dej ntws, nws tus nqi yog txiav txim siab los ntawm hom khoom, kub, concentration thiab lwm yam.
Lub sijhawm gel: kev kho cov kua nplaum yog cov txheej txheem ntawm kev hloov pauv ntawm cov kua mus rau lub zog, txij li thaum pib cov tshuaj tiv thaiv ntawm cov kua nplaum mus rau lub xeev tseem ceeb ntawm cov gel nyhav rau lub sijhawm khoom rau lub sijhawm gel, uas yog txiav txim los ntawm qhov sib xyaw ntawm epoxy resin. kua nplaum, kub thiab lwm yam.
Thixotropy: Cov yam ntxwv no yog hais txog lub colloid kov los ntawm sab nraud quab yuam (tswj, nplawm, vibration, ultrasonic nthwv dej, thiab lwm yam), nrog rau sab nraud quab yuam los ntawm tuab mus rau nyias, thaum lwm yam tseem ceeb los nres lub luag hauj lwm ntawm lub colloid rov qab mus rau qhov qub thaum qhov sib xws ntawm qhov tshwm sim.
Hardness: yog hais txog qhov tsis kam ntawm cov khoom siv rau sab nraud xws li embossing thiab khawb. Raws li cov kev sim sib txawv ntawm ntug dej hiav txwv (Shore) hardness, Brinell (Brinell) hardness, Rockwell (Rockwell) hardness, Mohs (Mohs) hardness, Barcol (Barcol) hardness, Vickers (Vichers) hardness thiab hais txog. Tus nqi ntawm hardness thiab hardness tester yam uas feem ntau siv hardness tester, Shore hardness tester qauv yog yooj yim, haum rau ntau lawm soj ntsuam, Shore hardness tester yuav muab faib ua hom A, C hom, D hom, A-hom rau ntsuas mos colloid, C thiab D-hom rau kev ntsuas ntawm semi-hard thiab hard colloid.
Ntog nro: lub attraction ntawm cov molecules nyob rau hauv cov kua kom cov molecules nyob rau saum npoo ntawm lub sab hauv ib tug quab yuam, qhov quab yuam no ua rau cov kua ntau npaum li sai tau kom txo tau nws cov deg cheeb tsam thiab tsim ntawm parallel mus rau saum npoo ntawm lub zog, hu ua nto nro. Los yog kev sib nrig sib traction ntawm ob qhov chaw nyob ib sab ntawm cov dej ntawm ib chav tsev ntev, nws yog ib qho kev tshwm sim ntawm molecular quab yuam. Chav tsev ntawm qhov nro yog N / m. Qhov loj ntawm qhov nro yog cuam tshuam nrog qhov xwm txheej, purity thiab kub ntawm cov kua.
3. xav txog cov yam ntxwv ntawmepoxy resin nplaumTom qab kho cov yam ntxwv tseem ceeb yog: tsis kam, voltage, dej nqus, compressive zog, tensile (tensile) lub zog, shear lub zog, tev lub zog, cuam tshuam lub zog, kub distortion kub, iav hloov kub, sab hauv kev ntxhov siab, tshuaj tiv thaiv, elongation, shrinkage coefficient , thermal conductivity, hluav taws xob conductivity, weathering, aging kuj, thiab hais txog.
Kev tiv thaiv: Piav qhia txog cov yam ntxwv ntawm cov khoom siv feem ntau nrog rau qhov chaw tiv thaiv lossis ntim tsis kam. Surface resistance tsuas yog tib qhov chaw nruab nrab ntawm ob lub electrodes ntsuas tus nqi tiv thaiv, chav tsev yog Ω. Cov duab ntawm cov electrode thiab tus nqi kuj tuaj yeem xam los ntawm kev sib txuas ntawm qhov chaw tiv thaiv ib cheeb tsam. Volume resistance, tseem hu ua ntim resistivity, ntim tsis kam coefficient, hais txog tus nqi tiv thaiv los ntawm cov thickness ntawm cov khoom, yog ib qho tseem ceeb qhia rau characterize cov hluav taws xob cov khoom ntawm dielectric los yog insulating cov ntaub ntawv. Nws yog ib qho tseem ceeb Performance index rau characterizes hluav taws xob khoom ntawm dielectric los yog insulating cov ntaub ntawv. 1cm2 dielectric tsis kam rau cov xau tam sim no, chav tsev yog Ω-m lossis Ω-cm. qhov loj dua qhov resistivity, qhov zoo dua cov khoom insulating.
Pov thawj voltage: tseem hu ua lub zog tiv thaiv hluav taws xob (lub zog rwb thaiv tsev), qhov siab dua qhov hluav taws xob ntxiv rau qhov kawg ntawm lub colloid, qhov ntau dua tus nqi ntawm cov khoom raug rau lub zog hluav taws xob, qhov ntau dua yuav ionize qhov kev sib tsoo, ua rau kev tawg ntawm colloid. Ua kom cov insulator tawg ntawm qhov qis tshaj voltage yog hu ua cov khoom ntawm qhov tawg voltage. Ua 1 hli tuab insulating khoom tawg, yuav tsum tau ntxiv cov voltage kilovolts hu ua insulating cov ntaub ntawv rwb thaiv tsev tiv thaiv voltage zog, hu ua withstand voltage, chav tsev yog: Kv / mm. insulating cov ntaub ntawv rwb thaiv tsev thiab kub muaj kev sib raug zoo. Qhov siab dua qhov kub, qhov ua tau zoo ntawm kev rwb thaiv tsev ntawm cov khoom siv insulating. Txhawm rau kom ntseeg tau tias cov rwb thaiv tsev muaj zog, txhua cov khoom siv insulating muaj qhov tsim nyog siab tshaj plaws ua haujlwm kub, nyob rau hauv qhov kub thiab txias hauv qab no, tuaj yeem siv tau ntev ntev, ntau tshaj qhov kub ntawm qhov no yuav sai sai.
Kev nqus dej: Nws yog ib qho kev ntsuas ntawm qhov uas cov khoom nqus dej. Nws hais txog qhov feem pua nce hauv huab hwm coj ntawm cov khoom immersed hauv dej rau qee lub sijhawm ntawm qhov kub thiab txias.
Tensile zog: Lub zog tensile yog qhov siab tshaj plaws tensile kev nyuaj siab thaum lub gel yog ncab kom tawg. Kuj tseem hu ua tensile force, tensile zog, tensile zog, tensile zog. Unit yog MPa.
Shear zog: tseem hu ua shear zog, hais txog lub tsev tsev cog khoom cheeb tsam tuaj yeem tiv taus qhov siab tshaj plaws thauj khoom mus rau qhov chaw sib txuas, feem ntau siv chav tsev ntawm MPa.
Peel zog: tseem hu ua tev lub zog, yog qhov siab tshaj plaws kev puas tsuaj rau ib chav tsev dav tuaj yeem tiv taus, yog ib qho kev ntsuas ntawm txoj kab ntawm lub zog muaj peev xwm, chav tsev yog kN / m.
Elongation: hais txog lub colloid nyob rau hauv lub tensile quab yuam nyob rau hauv qhov kev txiav txim ntawm qhov ntev ntawm qhov nce nyob rau hauv thawj qhov ntev ntawm qhov feem pua.
Kub deflection kub: yog hais txog kev ntsuas kub ntawm cov khoom siv kho, yog cov khoom siv kho kom zoo nkauj rau hauv ib hom isothermal tshav kub hloov nruab nrab haum rau kev hloov hluav taws xob, nyob rau hauv qhov zoo li qub bending load ntawm cov nqaj txhawb nqa yooj yim, ntsuas cov qauv khoov deformation rau ncav cuag tus nqi ntawm qhov ntsuas kub, uas yog, qhov kub thiab txias deflection, hu ua kub deflection kub, lossis HDT.
iav hloov kub: yog hais txog cov khoom kho los ntawm cov iav daim ntawv mus rau amorphous los yog heev elastic los yog lub xeev hloov pauv (los yog qhov ntxeev ntawm qhov kev hloov) ntawm qhov nqaim kub ntawm qhov kwv yees nruab nrab ntawm qhov taw tes, lub npe hu ua iav hloov qhov kub, feem ntau qhia hauv Tg, yog ib qho qhia txog kev tiv thaiv tshav kub.
Shrinkage ration: txhais raws li qhov feem pua ntawm qhov sib piv ntawm shrinkage rau qhov loj me ua ntej shrinkage, thiab shrinkage yog qhov sib txawv ntawm qhov loj me ua ntej thiab tom qab shrinkage.
Kev ntxhov siab sab hauv: hais txog qhov tsis muaj zog ntawm sab nraud, cov khoom siv colloid vim muaj qhov tsis xws luag, qhov kub thiab txias hloov, cov kuab tshuaj, thiab lwm yam vim li cas rau kev ntxhov siab sab hauv.
Tshuaj tiv thaiv: hais txog lub peev xwm tiv taus acids, alkalis, ntsev, kuab tshuaj thiab lwm yam tshuaj.
nplaim taws kuj: yog hais txog lub peev xwm ntawm cov khoom siv los tiv thaiv combustion thaum nyob rau hauv kev sib cuag nrog nplaim taws los yog tiv thaiv kev txuas ntxiv ntawm combustion thaum nyob deb ntawm nplaim taws.
Huab cua tsis kam: yog hais txog cov khoom raug tshav ntuj, tshav kub thiab txias, cua thiab nag thiab lwm yam huab cua.
Kev laus: curing colloid nyob rau hauv kev ua, cia thiab siv cov txheej txheem, vim muaj lwm yam (kub, lub teeb, oxygen, dej, rays, mechanical rog thiab chemical media, thiab lwm yam), ib tug series ntawm lub cev los yog tshuaj hloov, kom lub polymer cov ntaub ntawv crosslinking brittle, cracking nplaum, discoloration cracking, ntxhib blistering, nto chalking, delamination flaking, qhov kev ua tau zoo ntawm gradual deterioration ntawm txhua yam khoom ntawm qhov poob ntawm qhov poob ntawm qhov tsis tuaj yeem siv, qhov tshwm sim no hu ua kev laus. Qhov tshwm sim ntawm qhov kev hloov no yog hu ua kev laus.
Dielectric tsis tu ncua: kuj hu ua tus nqi capacitance, induced tus nqi (Permittivity). Hais txog txhua "unit ntim" ntawm cov khoom, nyob rau hauv txhua chav tsev ntawm "muaj peev xwm gradient" yuav txuag tau "electrostatic zog" (Electrostatic Zog) ntawm ntau npaum li cas. Thaum lub colloid "permeability" ntau dua (uas yog, qhov zoo dua qhov zoo), thiab ob qho tib si ze rau cov hlau tam sim no ua haujlwm, qhov nyuaj dua kom ncav cuag cov txiaj ntsig ntawm kev rwb thaiv tsev tiav, hauv lwm lo lus, qhov ntau dua yuav tsim tau qee qhov kev ua haujlwm. leak. Yog li ntawd, qhov dielectric tas li ntawm cov khoom siv insulating feem ntau, qhov me dua qhov zoo dua. Lub dielectric qhov tsis tu ncua ntawm dej yog 70, noo noo tsawg heev, yuav ua rau muaj kev hloov pauv loj.
4. feem ntau ntawm covepoxy resin nplaumyog lub tshav kub-teeb nplaum nplaum, nws muaj cov yam ntxwv tseem ceeb hauv qab no: qhov kub siab dua qhov kev kho sai dua; ib tug sib tov ntawm ntau qhov ceev ntawm curing; txheej txheem curing muaj exothermic phenomenon.
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Post lub sij hawm: Oct-31-2024