Kev siv cov nplaum epoxy resin

Cov nplaum epoxy resin(hu ua epoxy nplaum lossis epoxy nplaum) tau tshwm sim los ntawm kwv yees li xyoo 1950, tsuas yog ntau tshaj 50 xyoo. Tab sis nrog rau nruab nrab xyoo pua 20th, ntau yam kev tshawb fawb nplaum, nrog rau cov tshuaj nplaum, cov nplaum rheology thiab cov nplaum puas tsuaj mechanism thiab lwm yam kev tshawb fawb yooj yim ua haujlwm tob tob, yog li cov khoom nplaum, ntau yam thiab daim ntawv thov tau ua tiav sai. Epoxy resin thiab nws lub kaw lus kho nrog nws qhov tshwj xeeb, kev ua tau zoo heev thiab epoxy resin tshiab, tus neeg sawv cev kho tshiab thiab cov khoom ntxiv txuas ntxiv mus, dhau los ua ib chav kawm ntawm cov nplaum tseem ceeb nrog kev ua tau zoo heev, ntau yam, kev hloov pauv dav.
Cov nplaum epoxy resin ntxiv rau cov yas uas tsis yog polar xws li polyolefin bonding tsis zoo, rau ntau yam khoom siv hlau xws li txhuas, hlau, hlau, tooj liab: cov khoom siv tsis yog hlau xws li iav, ntoo, pob zeb, thiab lwm yam: nrog rau cov yas thermosetting xws li phenolics, aminos, unsaturated polyester, thiab lwm yam muaj cov khoom nplaum zoo heev, yog li muaj cov nplaum thoob ntiaj teb hu ua. Cov nplaum epoxy yog cov nplaum uas siv rau cov qauv epoxy resin hnyav.
Kev faib tawm los ntawm kev kho mob
Cov nplaum kho kom txias (tsis muaj cov nplaum kho kom sov). Kuj muab faib ua:

• Cov nplaum uas kub tsawg, kub kho <15 ℃;
• Chav tsev kub kho cov nplaum, kho kub 15-40 ℃.
• Cov nplaum kho cua sov. Muaj peev xwm muab faib ua:
• Qhov kub nruab nrab kho cov nplaum, kho kub txog 80-120 ℃;
• Cov nplaum kub kub, kub kho > 150 ℃.
• Lwm txoj hauv kev los kho cov nplaum, xws li cov nplaum kho lub teeb, cov nplaum ntub dej thiab cov nplaum kho dej, cov nplaum kho latent.

Cov nplaum epoxy muaj cov txiaj ntsig zoo li no piv rau lwm hom nplaum:

1. Cov tshuaj epoxymuaj ntau yam pawg polar thiab pawg epoxy nquag heev, yog li nws muaj lub zog nplaum zoo nrog ntau yam khoom siv polar xws li hlau, iav, cement, ntoo, yas, thiab lwm yam, tshwj xeeb tshaj yog cov uas muaj kev ua haujlwm siab, thiab tib lub sijhawm lub zog sib koom ua ke ntawm cov khoom siv epoxy kho kuj loj heev, yog li nws lub zog nplaum siab heev.
2. Thaum cov epoxy resin kho, yeej tsis muaj cov khoom uas tsis tshua muaj molecular volatiles tsim tawm. Qhov ntim ntawm cov nplaum txheej yog me me, li ntawm 1% txog 2%, uas yog ib qho ntawm cov hom uas muaj qhov me tshaj plaws ntawm kev kho shrinkage hauv thermosetting resins. Tom qab ntxiv cov filler tuaj yeem txo qis dua 0.2%. Tus coefficient ntawm linear expansion ntawm cov khoom siv epoxy kho kuj me me heev. Yog li ntawd, qhov kev ntxhov siab sab hauv yog me me, thiab tsis muaj feem cuam tshuam rau lub zog sib txuas. Tsis tas li ntawd, qhov nkag ntawm cov khoom siv epoxy kho yog me me, yog li qhov ruaj khov ntawm cov nplaum txheej yog qhov zoo.
3. Muaj ntau ntau yam epoxy resins, cov neeg sawv cev kho thiab cov khoom hloov kho, uas tuaj yeem tsim tau zoo thiab txawj ntse los ua cov nplaum nrog cov txheej txheem xav tau (xws li kho sai, kho qhov kub hauv chav, kho qhov kub qis, kho hauv dej, viscosity qis, viscosity siab, thiab lwm yam), thiab nrog kev siv kev ua tau zoo (xws li tiv taus qhov kub siab, kub qis, muaj zog siab, yooj ywm, tiv taus kev laus, hluav taws xob conductivity, magnetic conductivity, thermal conductivity, thiab lwm yam).
4. Nrog ntau yam khoom siv organic (monomer, resin, roj hmab) thiab cov khoom inorganic (xws li cov khoom sau, thiab lwm yam) muaj kev sib raug zoo thiab kev ua haujlwm zoo, yooj yim rau copolymerization, crosslinking, blending, filling thiab lwm yam kev hloov kho kom txhim kho kev ua tau zoo ntawm cov txheej nplaum.
5. Zoo tiv taus corrosion thiab dielectric zog. Tiv taus acid, alkali, ntsev, cov kuab tshuaj thiab lwm yam corrosion media. Volume resistivity 1013-1016Ω-cm, dielectric zog 16-35kV/mm.
6. Cov epoxy resins, cov neeg sawv cev kho thiab cov khoom ntxiv rau kev siv dav dav muaj ntau keeb kwm, ntau lawm, yooj yim rau kev tsim, tuaj yeem tiv tauj siab molding, tuaj yeem siv rau ntawm qhov loj.

Yuav xaiv li casepoxy resin

Thaum xaiv cov epoxy resin, muaj ntau yam yuav tsum xav txog, suav nrog:

1. Siv: Puas siv tau epoxy rau lub hom phiaj dav dav lossis ntau daim ntawv thov kev lag luam?
2. Lub neej ua haujlwm: Yuav siv cov epoxy ntev npaum li cas ua ntej kho?
3. Lub Sijhawm Kho: Nws yuav siv sijhawm ntev npaum li cas rau cov khoom kom kho thiab kho tag nrho siv cov epoxy?
4. Kub: Qhov kub ntawd yuav ua haujlwm li cas? Yog tias xav tau yam ntxwv, puas tau kuaj cov epoxy uas xaiv rau qhov kub siab tshaj?

Cov yam ntxwv:

• Muaj cov khoom thixotropic siab, tuaj yeem siv rau kev tsim kho façade.
• Cov yam ntxwv muaj kev nyab xeeb rau ib puag ncig (kev kho kom tsis muaj kuab tshuaj).
• Kev yooj ywm siab.
• Lub zog sib txuas siab.
• Kev rwb thaiv hluav taws xob siab.
• Cov khoom siv kho tshuab zoo heev.
• Kev tiv taus kub thiab dej zoo heev.
• Kev ruaj khov zoo heev, lub sijhawm cia khoom txog li 1 xyoos.

Daim Ntawv Thov:Rau kev sib txuas ntawm ntau yam hlau thiab cov hlau tsis yog hlau, xws li hlau nplaum, txhuas alloys, sensors, thiab lwm yam.