Nkwadebe nke Carboxylterminated maka Fusion-bonded-epoxy Powder mkpuchi

Nkwadebe na njirimara nke Carboxylterminated Poly (butadiene-co-acrylonitrile) -epoxy Resin Prepolymer for Fusion-bonded-epoxy Nkọcha ntụ ntụ

1 Okwu Mmalite

Ngwakọta-njide-epoxy (FBE) mkpuchi ntụ ntụ nke 3M Co., nke mbụ mepụtara, na-eji ya eme ihe mgbe nchebe corrosion ogologo oge dị oke egwu dị ka ụlọ ọrụ mmanụ, ígwè, gas na mmiri pipeline. Otú ọ dị, ihe ndị chọrọ ịrụ ọrụ maka mkpuchi ntụ ntụ FBE bụ ihe ịma aka n'ihi njupụta ha na-ejikọta ọnụ. Ihe njiri mara nke mkpuchi a gwọrọ bụ otu n'ime ihe mgbochi na-egbochi ngwa ngwa maka epoxies na ụlọ ọrụ. Ya mere, ọ ga-ekwe omume imeziwanye arụmọrụ nke mkpuchi FBE site n'ịbawanye ike nke mkpuchi ahụ. A na-eji ọtụtụ usoro siri ike mee ihe maka usoro epoxy siri ike, na-emekarị na ngwa ndị mejupụtara, gụnyere roba, elastomer, ihe na-ekpo ọkụ, copolymer, nanoparticle gbanwetụrụ epoxies na nchikota nke n'elu.
N'agbanyeghị na enwere ọtụtụ nyocha maka mgbanwe siri ike nke sistemụ epoxy, ihe ka ọtụtụ n'ime ya
Ọmụmụ ihe metụtara mgbanwe kemịkalụ nke resin epoxy na rọba mmiri na-arụ ọrụ, ọkachasị carboxyl-terminated butadiene-co-acrylonitrile (CTBN). McGarry et al jiri CTBN nke molecular arọ 3000 na DGEBA epoxies dị iche iche gwọọ ya na piperidine. Kinloch et al kpughere ndabere siri ike na sistemu DGEBA/CTBN/piperidine site n'ịgbakọ mmetụta mgbaji siri ike n'ụdị ọgụ dị iche iche na ịnweta mmụba okpukpu abụọ dị nso na ike siri ike. Enwere ike iwebata CTBN na sistemụ epoxy dị ka diglycidyl ether nke bisphenol-A (DGEBA) epoxy resins. Mgbe a na-agwọta resins epoxy dị otú ahụ yana roba mmiri mmiri, ike nke ngalaba nwere ike ime ka ọ dịkwuo mma site n'inweta ike mmetụta. A maara nke ọma na resins ndị a gwọrọ gụnyere sistemu akụkụ abụọ[26] nke a na-agbasasị rọba mmiri mmiri na matrix nke epoxy nwere usoro ngalaba okirikiri ma ọ bụ ihe na-aga n'ihu.
Ya mere, ruo ugbu a, na toughening nke epoxy resins ka tumadi lekwasịrị anya na mmiri mmiri epoxy resins, na obere nnyocha lekwasịrị anya toughening siri ike epoxy resins. N'akwụkwọ a, anyị kwadebere CTBN-EP prepolymers na-enweghị iji ihe ọ bụla organic solvents. Mgbe ahụ, a na-emepụta ihe mkpuchi ntụ ntụ FBE nke jupụtara na CTBN-EP prepolymers. Dabere na akụrụngwa akụrụngwa yana nyocha morphological, a nwalere iji nyochaa usoro siri ike na-enwe na matriks nke kewapụrụ agba. Nyocha nke mmekọrịta ihe onwunwe nke usoro CTBN-EP bụ mgbalị ọhụrụ maka ihe ọmụma anyị kacha mma. Ya mere, teknụzụ na-emesi ike akwụkwọ akụkọ a nwere ike gbasaa mpaghara ngwa nke mkpuchi ntụ ntụ FBE na ụlọ ọrụ.

2 Nnwale

Ngwa 2.1

Epoxy resin e ji mee ihe bụ diglycidyl ether siri ike nke bisphenol A (DGEBA) (DOW, DER663) nwere oke epoxide nhata nke 750-900. Liquid, carboxyl-treminated poly (butadiene-co-acrylonitrile) (CTBN) (Eme)rald, Hypro 1 300 × 1323) nwere ọdịnaya acrylonitrile nke 26% ejiri mee ihe. A na-eji Triphenyl phosphine mee ihe dị ka ihe na-akpali akpali na usoro a. Onye na-agwọ ọrịa (HTP-305) bụ phenolic. A zụtara Phenolic epoxy resin (GT7255) n'aka HUNTSMAN Co.,Pigment(L6900), nke BASF Co wetara, onye Degassing na onye na-eme ọkwa ọkwa ka zụtara n'aka Aisitelun.

2.2 Synthesis na njirimara nke CTBNEP prepolymers

A na-etinye stoichiometric nke epoxy resins, CTBN na catalyst n'ime flask nke na-ekpo ọkụ ma kpalie n'ụzọ igwe na-akpalite na 150 ℃ maka 3.0 h. A kwụsịrị mmeghachi omume ahụ mgbe uru acid dara na 0. Akara prepolymer dị ka C0, C5, C10, C15, na C20 (ndebanye aha bụ ọdịnaya nke CTBN). E gosipụtara mmeghachi omume nwere ike ime na Fig.1.
A na-eji FTIR spectroscopy iji mara ihe owuwu ndị ahụ. Edere ihe nkiri FTIR site na FTLA2000-104 spectrophotometer n'ogo ogologo nke 4 500-500 cm-1 (ABB Bomem nke Canada). GPC kwadoro ihe ọ̀tụ̀tụ̀ molekul na nkesa arọ molekụla nke CTBN-EP prepolymers. A na-eji Tetrahydrofuran (THF) mee ihe dị ka eluent na ọnụego flw nke 1.0 ml / min. A na-ahazi usoro kọlụm ahụ site na iji polystyrene ọkọlọtọ mono dispersed.

2.3 Nkwadebe na njirimara nke ihe nkiri na-agwọ ọrịa

A kwadoro films ọgwụgwọ ise nwere 0wt%-20wt% CTBN. Ọnụ ọgụgụ nke DGEBA gbakọrọ (dị ka usoro e nyere na Tebụl 1) na HTP-305 kpalitere na 120 ℃ maka 10 min iji nweta ngwakọta otu. A na-awụsa ngwakọta ahụ n'ime mpempe ígwè a na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na oven dị ọkụ na 180 ℃ maka 10 min wee biputere maka 30 min na 200 ℃.

Emere ule nlegharị anya na igwe KD111-5 (KaiQiang Co., Ltd., China) na ọsọ isi nke 1 mm / min. Ewepụtara ụkpụrụ ndị ahụ site na nkezi nke nlele atọ dịka GB/2568-81 siri dị. A na-enyocha elongation na ebe nkwụsị nke ihe atụ ahụ. Achọpụtara ike mmetụta nke ihe nlele ahụ na igwe MZ-2056 na-eji ụdị akụkụ anọ nke 40 mm × 10 mm × 2 mm. Emere ule ndị a na ọnụ ụlọ okpomọkụ ma were ụkpụrụ sitere na nkezi nke nlele atọ dịka GB/T2571-1995 siri dị.

The iko mgbanwe okpomọkụ nke na-agwọ ihe nkiri e kpebisiri ike site na iji a dynamic mechanical analyzer (DMA) .The nha e rụrụ na a kpo oku ọnụego nke 2 ℃ / min si -90 ℃ ka 180 ℃ na a fi xed ugboro larịị nke 1 Hz. E nwetara modul nchekwa, modul ọnwụ na ihe mfu site na iji ụdị cantilever nke nwere ihe nlele nke nha 30 mm × 10 mm × 2 mm.

A na-enyocha microscopy eletrọnịkị (SEM) (Quanta-2000 model SEM, FEI of Dutch) na voltaji eletrọn nke 10 kV. A na-agbaji ihe atụ ndị ahụ n'okpuru mmiri mmiri nitrogen ma buru ụzọ gwọọ ya na toluene iji wepụ akụkụ rọba tupu akpọọ ya n'okpuru oghere. Achọpụtara nha na nkesa nke ụmụ irighiri ihe achụsasịrị site n'iwere onyonyo nke ọkara.

Atụle pasentị ibu arọ na njirimara mbelata okpomọkụ nke ihe nlele ndị a kwadebere site na onye nyocha thermogravimetric (TGA) nke edere na Ngwa (METTER Toledo nke Switzerland). Ọnụ ego nlele e weere dị ihe dịka 5-10 mg n'ime pan sample platinum. A na-edobe ọnụego kpo oku na ọsọ ọ bụla na 10 ℃ / min na ọnọdụ okpomọkụ dị na 800 ℃.