He aha ka resin thermosetting?
ʻO ka resin thermosetting a i ʻole thermosetting resin he polymer i ho'ōla ʻia a ʻano ʻano paʻakikī paha me ka hoʻohana ʻana i nā ʻano hoʻōla e like me ka hoʻomehana ʻana a i ʻole ka radiation.ʻO ke kaʻina hana hoʻōla he hana hiki ʻole ke hoʻololi.Hoʻopili ʻo ia i kahi pūnaewele polymer ma o kahi paʻa kemika covalent.
Ma hope o ka hoʻomehana ʻana, paʻa ka mea thermosetting a hiki i ka wela i ka wela i hoʻomaka ai e hoʻohaʻahaʻa.He kū'ē kēia ʻano hana me nā plastic thermoplastic.ʻO kekahi mau hiʻohiʻona o nā resins thermosetting:
Phenolic resin
- Amino resin
- poliester resin
- Silika resine
- Epoxy resin, a
- Polyurethane resin
I waena o lākou, epoxy resin a i ʻole phenolic resin kekahi o nā resins thermosetting maʻamau.I kēia mau lā, hoʻohana nui ʻia lākou i ka hoʻolālā ʻana a me nā noi mea hoʻohui kūikawā.Ma muli o ko lākou ikaika kiʻekiʻe a me ka ʻoʻoleʻa (ma muli o ko lākou kiʻekiʻe kiʻekiʻe o ka hoʻopili ʻana), ua aneane kūpono lākou no kēlā me kēia noi.
He aha nā ʻano nui o nā resins epoxy i hoʻohana ʻia i nā mea hana?
ʻO nā ʻano nui ʻekolu o nā resins epoxy i hoʻohana ʻia i nā noi mea hoʻohui:
- Phenolic aldehyde glycidyl ether
- Aromatic glycidyl amine
- Pūhui aliphatic cyclic
He aha nā waiwai nui o ka epoxy resin?
Ua helu mākou ma lalo o nā waiwai nui i hāʻawi ʻia e ka epoxy resin.
- Ka ikaika kiʻekiʻe
- Haʻahaʻa haʻahaʻa haʻahaʻa
- Loaʻa ka pili maikaʻi i nā substrate like ʻole
- Hoʻopili uila kūpono
- Ke kū'ē kemika a me ke kū'ē'ē, e like me
- Haʻahaʻa kumu kūʻai a haʻahaʻa ʻona
He maʻalahi ka ho'ōla ʻana i nā resins epoxy a kūpono me ka hapa nui o nā substrate.He maʻalahi lākou e pulu i ka ʻili a kūpono loa no nā noi mea hoʻohui.Hoʻohana ʻia ka resin epoxy e hoʻololi i kekahi mau polymers, e like me ka polyurethane a i ʻole ka polyester unsaturated.Hoʻonui lākou i ko lākou mau waiwai kino a me kemika.No ka thermosetting epoxy resins:
- ʻO ka pae ikaika tensile mai 90 a 120MPa
- ʻO ka laulā o ka modulus tensile he 3100 a 3800MPa
- ʻO ke anawaena hoʻololi aniani (Tg) he 150 a 220 ° C
ʻElua mau hemahema nui ka epoxy resin, ʻo ia ka brittleness a me ka ʻike wai.
Ka manawa hoʻouna: Jan-29-2024
