ʻIkepili o ka Epoxy Resin Formulation e pono i nā ʻenehana ke hoʻomaopopo

Hoʻohana pinepine ʻia ka resin epoxy me nā mea hoʻohui e loaʻa ai ka waiwai noi. Hiki ke koho ʻia nā mea hoʻohui e like me nā kumu like ʻole, a ʻo nā mea hoʻohui i hoʻohana pinepine ʻia e komo pū me nā mea hoʻōla, nā mea hoʻololi, nā mea hoʻopiha, nā mea hoʻoheheʻe, a me nā mea ʻē aʻe.

  Ma waena o lākou, he mea hoʻohui pono nā mea hoʻolaʻa, a pono no nā adhesives, coatings, a me ka hoʻolei ʻana; a i ʻole, ʻaʻole hiki i ka epoxy resin ke hoʻōla. Ma muli o nā koi hana like ʻole, epoxy resins, curing agents, modifiers, fillers, diluents, a me nā mea hoʻohui ʻē aʻe he mau koi like ʻole.

  I. Koho o ka Epoxy Resin

  1. E koho ma muli o ke kumu

No nā mea hoʻopili, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i nā resins me nā waiwai epoxy waena (0.25-0.45), e like me 6101 a me 634; no nā mea hoʻoheheʻe ʻia, makemake ʻia nā resins me nā waiwai epoxy kiʻekiʻe (0.40), e like me E51/YD128 a me 6101/E44 ; no nā uhi maʻamau, koho pinepine ʻia nā resins me nā waiwai epoxy haʻahaʻa (<0.25), e like me 901, 904, 907, a me 909.

  2. E koho ma muli o ka ikaika mechanical

ʻOi aku ka ikaika o nā resins me nā waiwai epoxy kiʻekiʻe akā ʻoi aku ka palupalu; ʻO nā resins me nā waiwai epoxy waena he ikaika maikaʻi ma nā mahana kiʻekiʻe a me nā haʻahaʻa haʻahaʻa; ʻO nā resins me nā waiwai epoxy haʻahaʻa he haʻahaʻa ka ikaika ma nā wela kiʻekiʻe. ʻO kēia ma muli o ka pilina ma waena o ka ikaika a me ka crosslinking. ʻO nā kumu waiwai epoxy kiʻekiʻe ka hopena i ka hoʻopili ʻana ma hope o ka hoʻōla ʻana, ʻoiai ʻo nā kumu waiwai epoxy haʻahaʻa e hopena i ka crosslinking haʻahaʻa, e alakaʻi ana i nā ʻokoʻa o ka ikaika.

  3. E koho ma muli o nā koi hana

No nā noi ʻaʻole makemake i ke kūpaʻa wela kiʻekiʻe a me nā koi haʻahaʻa haʻahaʻa, hiki ke koho ʻia nā resins me nā waiwai epoxy haʻahaʻa e maloʻo wikiwiki a emi ʻole i ka poho. No nā noi e koi ana i ke komo maikaʻi a me ka ikaika kiʻekiʻe, hiki ke koho ʻia nā resins me nā koina epoxy kiʻekiʻe.

  II. Koho ana i na mea hoola

  1. Nā ʻano lāʻau lapaʻau

  ʻO nā mea lapaʻau epoxy resin maʻamau i hoʻohana ʻia he aliphatic amines, cycloaliphatic amines, aromatic amines, polyamides, anhydride, resin type, and tertiary amines. Eia kekahi, ma lalo o ka hana a nā photoinitiators, hiki i ke kukui ultraviolet a i ʻole ke kukui ke hoʻōla i ka resin epoxy. Hoʻohana maʻamau ka hoʻōla ʻana ma ka lumi wela a i ʻole ka wela haʻahaʻa i nā lāʻau lapaʻau ʻano amine, aʻo ka hoʻōla ʻana me ka hoʻohana maʻamau i ka anhydride a me nā mea hoʻōla ʻala.

  2. Ka nui o nā lāʻau lapaʻau

  (1) Ka helu ʻana no nā mea hoʻohui crosslinking ma muli o ka amine:

ʻAmina ʻai = mg/hn

ʻAuhea: m = amine molecular weight, hn = helu o nā ʻātoma hydrogen ikaika, g = waiwai epoxy (helu o nā mea like epoxy no 100 grams o ka resin epoxy)

ʻAʻole pono ka nui o ka loli ma mua o 10-20%. ʻO ka hoʻohana nui ʻana i ka amine no ka hoʻōla ʻana hiki ke hana i ka resin brittle, ʻoiai ʻaʻole lawa ka hoʻohana hiki ke alakaʻi i ka hoʻōla piha ʻole.

(2) Ka helu ʻana no nā mea hana anhydride:

ʻAiʻa anhydride = mg(0.6~1)/100

Kahi: m = anhydride molecular weight, g = epoxy waiwai, (0.6~1) ka helu hoʻokolohua

  3. Nā loina no ke koho ʻana i nā lāʻau lapaʻau

(1) E koho ma muli o nā koi hana: E koho i nā mea lapaʻau kūpono e pili ana i nā koi like ʻole e like me ke kūpaʻa wela kiʻekiʻe, hiki ke maʻalahi, a me ka pale ʻana i ka corrosion.

(2) E koho ma muli o ke ʻano hoʻōla: ʻAʻole pono nā huahana hiki ʻole ke hoʻomehana ʻia ke hoʻohana i nā mea hoʻōla wela.

(3) E koho ma muli o ke ola o ka ipuhao: E koho i ka lāʻau lapaʻau kūpono e pili ana i ke ola o ka ipuhao, e pili ana i ka manawa mai ka hoʻohui ʻana i ka lāʻau lapaʻau i ka resin epoxy a hiki ʻole ke hoʻohana hou ʻia. No ka lōʻihi o ke ola o ka ipuhao, koho maʻamau ka anhydride a i ʻole nā ​​​​mea hoʻōla huna.

(4) E koho ma muli o ka palekana: E koho i nā lāʻau lapaʻau me ka haʻahaʻa haʻahaʻa e hoʻomaʻamaʻa i ka hana palekana.

(5) E koho ma muli o ke kumukūʻai.

  III. Ke koho ʻana i nā mea hoʻololi

  Hoʻohana ʻia nā mea hoʻololi e hoʻomaikaʻi i ka maʻalahi, ka ikaika shear, ka ikaika kulou, ka pale ʻana i ka hopena, a me nā waiwai insulation o nā resins epoxy. Hōʻike pōkole ʻia nā mea hoʻololi maʻamau a me ko lākou mau ʻano.

(1) Polythiol rubber: Hoʻomaikaʻi i ka ikaika o ka hopena a me ka pale ʻili;

(2) Polyamide resin: Hoʻonui i ka brittleness a hoʻonui i ka pili;

(3) Polyvinyl butyral: Hoʻonui i ka hopena hopena;

(4) Nitrile rubber: Hoʻonui i ka hopena hopena;

(5) Phenolic resin: Hoʻomaikaʻi i ka mahana a me ka pale ʻana i ka corrosion;

(6) Polyester resin: Hoʻonui i ka hopena hopena;

(7) Melamine formaldehyde resin: Hoʻonui i ke kū'ē a me ka ikaika;

(8) Furfural resin: Hoʻomaikaʻi i nā waiwai flexural a me ka pale ʻana i ka waikawa;

(9) Vinyl resin: Hoʻonui i ka pale ʻili a me ka ikaika hopena;

(10) Isocyanate: E ho'ēmi i ka mois permeability a hoʻonui i ka pale wai;

(11) Silicone resin: Hoʻonui i ka pale wela.

  ʻO ka nui o ka polythiol rubber a me nā mea hoʻololi ʻē aʻe hiki ke piʻi mai ka 50-300% a e koi aku i nā mea hoʻōla. ʻO ka hoʻohana ʻana i ka resin polyamide a me ka resin phenolic ma ke ʻano he 50-100%, aʻo ka hoʻohana ʻana i ka resin polyester he 20-30%. Hiki ke hoʻohui ʻia nā lāʻau lapaʻau hou i nā mea liʻiliʻi e wikiwiki ai ka hopena.

ʻO ka maʻamau, ʻoi aku ka nui o nā mea hoʻololi i hoʻohana ʻia, ʻoi aku ka nui o ka maʻalahi, akā e emi iho ana ka wela wela o ka huahana resin. No ka hoʻomaikaʻi ʻana i ka maʻalahi o ka resin, hoʻohana pinepine ʻia nā mea paʻakikī e like me dibutyl phthalate a i ʻole dioctyl phthalate.

  IV. Ke koho ana i na mea hoopiha

  ʻO ka hana o nā mea hoʻopihapiha ka hoʻomaikaʻi ʻana i kekahi mau waiwai o ka huahana, hoʻomaikaʻi i nā kūlana dissipation wela i ka wā resin curing, hoʻemi i ka nui o ka epoxy resin i hoʻohana ʻia, a me nā kumu haʻahaʻa. Hiki ke koho ʻia nā mea hoʻopihapiha like ʻole ma muli o ka noi. ʻOi aku ka maikaʻi no ka nui o nā mea hoʻopihapiha ma lalo o 100 mesh, a ʻo ka nui i hoʻohana ʻia ma muli o ka noi. ʻO nā hoʻolauna pōkole i nā mea hoʻopihapiha maʻamau penei:

ʻO nā pulu Asbestos a me nā kīʻaha aniani: E hoʻonui i ka paʻakikī a me ke kū'ē i ka hopena;

ʻO ka pauda Quartz, ka pauda seramika, ka pauda hao, ka sima, a me ka corundum: Hoʻonui i ka paʻakikī;

ʻO ka alumina, nā seramika, ka pauka asbestos, ka pauka silica gel, a me ka sima wela kiʻekiʻe: E hoʻomaikaʻi i ka adhesion a me ka ikaika mechanical;

ʻO ka pauka Asbestos, ka pauda quartz, a me ka pauda pōhaku: E hoʻemi i ka emi ʻana;

ʻO ka pauka aluminika, ka pauka keleawe, ka pauka hao, a me nā pauka metala ʻē aʻe: E hoʻonui i ka hoʻoili wela a me ka uila;

ʻO ka pauka Graphite, ka pauka talcum, ka pauka quartz: E hoʻomaikaʻi i ke kūpaʻa a me ka lubricity;

Corundum a me nā mea abrasive ʻē aʻe: E hoʻomaikaʻi i ka pale ʻana i ke kapa;

ʻO ka pauka Mika, ka pauda seramika, ka pauda quartz: E hoʻonui i ka hoʻokuʻu;

Nā puaʻa like ʻole a me ka graphite: Hāʻawi i ke kala;

Eia kekahi, ua hōʻike ʻia ʻo ka hoʻohui ʻana o nā pūhui oxide e like me P, As, Sb, Bi, Ge, Sn, a me Pb i nā liʻiliʻi liʻiliʻi (27-35%) hiki ke mālama i ka adhesion ma lalo o ke kiʻekiʻe o ka mahana a me ke kaomi.

  V. Koho ana i na mea hoohehee

  ʻO ka hana o nā diluents e hōʻemi i ka viscosity a hoʻomaikaʻi i ka penetrability o ka resin. Hiki ke hoʻokaʻawale ʻia nā diluents i nā ʻano inert a me nā ʻano hana, a ʻo ka hoʻohana maʻamau ʻaʻole ʻoi aku ma mua o 30%. ʻO nā mea hoʻoheheʻe maʻamau: diglycidyl ether o bisphenol A, triglycidyl ether o glycerol, glycidyl ether o propylphenol, glycidyl ether o butylphenol, glycidyl ether o ethylphenol, glycidyl ether o propylphenol, inert diluents, xylene, toluene, acetone.

  Ma mua o ka hoʻohui ʻana i ka lāʻau lapaʻau, pono e nānā i nā mea āpau i hoʻohana ʻia, me ka resin, curing agent, filler, modifier, diluent, etc., i mea e hoʻokō ai lākou i kēia mau koi:

(1) ʻAʻohe o ka wai: Pono e hoʻomaloʻo mua ʻia nā mea i loaʻa i ka wai, a e hoʻohana ʻia nā mea hoʻoheheʻe me ka liʻiliʻi o ka wai.

(2) Maʻemaʻe: ʻO ka ʻike haumia, me ka ʻole o ka wai, pono ke emi ma lalo o 1%. I ka hoʻohana ʻana i kahi mea liʻiliʻi, makemake ʻia nā mea papa reagent.

(3) E hoʻomaopopo inā ua pau nā mea.