Kugwiritsa ntchito zomatira za epoxy resin

Zomatira za epoxy resin(otchedwa epoxy zomatira kapena zomatira epoxy) adawonekera cha m'ma 1950, zaka zoposa 50 zokha. Koma ndi zaka za m'ma 20, zosiyanasiyana zomatira chiphunzitso, komanso zomatira umagwirira, rheology zomatira ndi zomatira kuwonongeka limagwirira ndi zina zofunika kafukufuku ntchito mozama patsogolo, kotero kuti zomatira katundu, mitundu ndi ntchito zapita patsogolo mofulumira. Epoxy resin ndi njira yake yochiritsa ndi yapadera, ntchito yabwino kwambiri komanso utomoni watsopano wa epoxy, mankhwala atsopano ochiritsa ndi zowonjezera zikupitiriza kuonekera, kukhala gulu la zomatira zofunika zomwe zimagwira ntchito bwino, mitundu yambiri, kusinthasintha kwakukulu.
Epoxy utomoni zomatira kuwonjezera sanali polar mapulasitiki monga polyolefin kugwirizana si zabwino, kwa zosiyanasiyana zitsulo monga aluminiyamu, chitsulo, chitsulo, mkuwa: zinthu sanali zitsulo monga galasi, matabwa, konkire, etc.: komanso mapulasitiki thermosetting monga phenolics, aminos, unsaturated poliyesitala ndi zomatira, ndi zomatira, ndi zomatira. Epoxy zomatira ndi zomatira zomata zolemera za epoxy resin.
Gulu ndi mikhalidwe yochiritsa
Zomatira zoziziritsa kuzizira (palibe zomatira zochiritsira kutentha). Komanso yagawidwa mu:

• Low kutentha kuchiritsa zomatira, kuchiritsa kutentha <15 ℃;
• Kutentha kwa chipinda kuchiritsa zomatira, kuchiritsa kutentha kwa 15-40 ℃.
• Kutentha kuchiza zomatira. Itha kugawidwanso kukhala:
• Kutentha kwapakati kuchiritsa zomatira, kuchiritsa kutentha pafupifupi 80-120 ℃;
• Kutentha kwakukulu kuchiritsa zomatira, kuchiritsa kutentha> 150 ℃.
• Njira zina zochiritsira zomatira, monga zomatira zowala, zomatira zonyowa ndi zomatira zochizira madzi, zomatira zobisika zochizira.

Zomatira za epoxy zili ndi zabwino izi kuposa zomatira zamitundu ina:

1. Epoxy utomonilili ndi magulu osiyanasiyana a polar ndi gulu logwira ntchito kwambiri la epoxy, motero limakhala ndi mphamvu zomatira zolimba ndi zinthu zosiyanasiyana za polar monga zitsulo, galasi, simenti, matabwa, mapulasitiki, ndi zina zotero, makamaka omwe ali ndi ntchito yapamwamba pamtunda, ndipo nthawi yomweyo mphamvu yogwirizana ya epoxy yochiritsidwa ndi yaikulu kwambiri, kotero kuti mphamvu zake zomatira ndizokwera kwambiri.
2. Palibe kutsika kwa ma molekyulu omwe amapangidwa pamene epoxy resin yachiritsidwa. Kutsika kwa voliyumu ya zomatira ndizochepa, pafupifupi 1% mpaka 2%, yomwe ndi imodzi mwa mitundu yokhala ndi shrinkage yaying'ono yochiritsa mu resins ya thermosetting. Pambuyo powonjezera zodzaza zitha kuchepetsedwa kukhala pansi pa 0.2%. The coefficient of linear extension of the epoxy healed material nawonso ndi ochepa kwambiri. Choncho, kupsinjika kwamkati kumakhala kochepa, ndipo kumakhala ndi zotsatira zochepa pa mphamvu yomangirira. Kuphatikiza apo, kukwawa kwa zinthu zochiritsidwa ndi epoxy ndikochepa, kotero kukhazikika kwa gawo lomatira ndikwabwino.
3. Pali mitundu yambiri ya epoxy, oyeserera ndi osungulumwa, omwe amatha kupangidwa mwaluso kuti apange zomata ndi njira yokhazikika, ndikuthira kutentha kwambiri, kutentha kwakukulu, kosinthika kukana, conductivity magetsi, maginito madutsidwe, matenthedwe conductivity, etc.).
4. Ndi zinthu zosiyanasiyana organic (monomer, utomoni, mphira) ndi inorganic zinthu (monga fillers, etc.) ndi ngakhale zabwino ndi reactivity, zosavuta copolymerization, crosslinking, kusanganikirana, kudzaza ndi zosintha zina kuti patsogolo ntchito wosanjikiza zomatira.
5. Zabwino kukana dzimbiri ndi dielectric katundu. Kugonjetsedwa ndi asidi, alkali, mchere, zosungunulira ndi zina zowonongeka. Volume resistivity 1013-1016Ω-cm, mphamvu ya dielectric 16-35kV/mm.
6. General-purpose epoxy resins, machiritso ndi zowonjezera zimakhala ndi zoyambira zambiri, zopanga zazikulu, zosavuta kupanga, zitha kukhala zolumikizira kukakamiza, zitha kugwiritsidwa ntchito pamlingo waukulu.

Momwe mungasankhireepoxy utomoni

Posankha utomoni wa epoxy, pali zinthu zambiri zomwe muyenera kuziganizira, kuphatikiza:

1. Gwiritsani ntchito: Kodi epoxy ingagwiritsidwe ntchito pazinthu wamba kapena ntchito zambiri zamafakitale?
2. Moyo wogwira ntchito: Kodi epoxy iyenera kugwiritsidwa ntchito mpaka liti musanachiritse?
3. Nthawi Yochiza: Zitenga nthawi yayitali bwanji kuti mankhwalawa achire ndikuchiritsidwa kwathunthu pogwiritsa ntchito epoxy?
4. Kutentha: Kodi mbaliyo idzagwira ntchito pa kutentha kotani? Ngati khalidwelo likufunidwa, kodi epoxy yosankhidwa yayesedwa kuti ikhale yotentha kwambiri?

Makhalidwe:

• Mkulu wa thixotropic katundu, angagwiritsidwe ntchito pomanga façade.
• Makhalidwe apamwamba achitetezo chachilengedwe (dongosolo lopanda zosungunulira).
• Kusinthasintha kwakukulu.
• High kugwirizana mphamvu.
• Kutsekemera kwamagetsi kwapamwamba.
• Wabwino makina katundu.
• Kutentha kwabwino kwambiri komanso kukana madzi.
• Kukhazikika kosungirako bwino, nthawi yosungira mpaka chaka chimodzi.

Ntchito:Kumangirira zitsulo zosiyanasiyana ndi zopanda zitsulo, monga maginito, ma aloyi a aluminiyamu, masensa, ndi zina.