Qhov sib txawv tseem ceeb ntawm bakelite thiab melamine yog tias bakelite yog thermosetting phenol-formaldehyde resin whereas melamine yog ib qho amine organic compound.
Bakelite yog cov yas thermosetting. Melamine yog cov khoom siv thermoplastic, tab sis thaum sib txuas nrog formaldehyde, nws muab cov khoom siv thermosetting zoo, melamine resin.
Bakelite yog dab tsi?
Bakelite yog thawj cov yas ua los ntawm cov khoom siv hluavtaws. Bakelite yog ib qho thermosetting phenol-formaldehyde resin. Cov tshuaj no yog tsim los ntawm condensation cov tshuaj tiv thaiv ntawm phenol thiab formaldehyde. Cov khoom raug tshawb pom thiab tsim los ntawm tus kws kho mob Leo Baekeland, thiab nws tau patented hauv xyoo 1909. Qhov kev tshawb pom no tau hloov pauv vim nws muaj ntau yam sib txawv thiab tseem ceeb hauv ntau qhov chaw.
Daim duab 01: Cov Qauv Tshuaj ntawm Bakelite
Kev tsim cov bakelite yog txheej txheem ntau yam uas pib nrog cua sov ntawm phenol thiab formaldehyde nyob rau hauv lub xub ntiag ntawm catalyst. Feem ntau, HCl, zinc chloride, lossis ammonia puag yog siv los ua cov catalyst ntawm no. Cov tshuaj tiv thaiv no tsim cov kua dej condensation npe hu ua Bakelite A. Nws yog soluble hauv cawv, acetone, thiab phenol. Tom qab cua sov ntxiv, cov kua no zoo li ib nrab soluble thiab dhau los ua cov pos hniav nyuaj insoluble. Thaum siv cov kub kub rau qhov ntau lawm, nws tuaj yeem ua npuas dej. Muab cov khoom condensation kawg rau hauv lub qe-zoo li Bakelizer uas tuaj yeem cuam tshuam cov foaming, uas ua rau cov khoom uas nyuaj heev, infusible, thiab insoluble.
Muaj ntau yam khoom tseem ceeb ntawm bakelite. Piv txwv li, peb tuaj yeem pwm cov khoom no, tab sis nws tsis tuaj yeem molded tau yooj yim, thiab molding yog irreversible, thiab nws muaj lub sij hawm ntau lawm. Ntxiv mus, cov moldings no du heev thiab tuaj yeem khaws lawv cov duab. Tsis tas li ntawd, cov khoom siv tiv taus hluav taws xob, cua sov, khawb, thiab cov kuab tshuaj.
melamine yog dab tsi?
Melamine yog cov organic compound uas muaj cov tshuaj formula C3H6N6. Nws zoo nkaus li cov khoom siv dawb dawb uas yog ib qho trimer ntawm cyanamide thiab muaj 1, 3, 5-triazine skeleton. Zoo ib yam li cyanimide, qhov sib xyaw no kuj muaj txog 67% nitrogen los ntawm huab hwm coj. Cov qauv siv lead ua ntawm cov tshuaj no yog monoclinic.
Lub npe no tau muaj koob meej nyob rau hauv ob peb xyoos dhau los vim qhov tsis raug cai ntawm melamine ntxiv rau hauv qee yam khoom noj nrog lub hom phiaj ntawm kev nce cov ntsiab lus pom tseeb. Txawm li cas los xij, kev noj cov tshuaj melamine tuaj yeem ua rau muaj kev puas tsuaj rau cov menyuam yaus, kev puas tsuaj rau lub raum thiab zais zis; Nws tseem ua rau mob qog noj ntshav. Ntxiv mus, cov tshuaj no yog ib qho khaus thaum nqus los yog thaum nws los rau ntawm daim tawv nqaij lossis ob lub qhov muag.
Daim duab 02: Ib qho Melamine Dinnerware
Txawm tias nws muaj kev phom sij txaus ntshai, nws muaj ntau daim ntawv thov siv tau. Thaum ua ke nrog formaldehyde, melamine yog qhov tsim nyog los tsim cov melamine resins, uas yog cov yam ntxwv ruaj khov thermosetting yas siv rau hauv high-pressure hniav laminates, xws li. Formica. Tsis tas li ntawd, melamine ua npuas ncauj yog ib qho tseem ceeb raws li cov khoom siv insulating, cov khoom siv suab nrov thiab ua cov khoom siv tu polymeric, xws li. Khawv koob Eraser, thiab lwm yam. Tsis tas li ntawd, cov khoom no thiab nws cov ntsev muaj txiaj ntsig zoo li hluav taws kub-retardant additives hauv cov xim, yas thiab ntawv.
Qhov txawv ntawm Bakelite thiab Melamine yog dab tsi?
Bakelite yog cov yas thermosetting. Melamine tsis yog yas, tab sis raws li kev sib txuas nrog formaldehyde, nws muab cov yam ntxwv ruaj khov thermosetting khoom melamine resin. Qhov sib txawv tseem ceeb ntawm bakelite thiab melamine yog tias bakelite yog thermosetting phenol-formaldehyde resin, whereas melamine yog ib qho amine organic compound. Ntxiv mus, bakelite yog siv rau kev tsim hluav taws xob hloov hluav taws xob thiab tshuab qhov chaw ntawm cov tshuab hluav taws xob, cov organic synthesis cov tshuaj tiv thaiv, thiab lwm yam, thaum melamine yog siv los tsim melamine resins uas yog cov yam ntxwv ruaj khov thermosetting yas uas muaj txiaj ntsig zoo hauv cov khoom siv hluav taws xob zoo nkauj.
Cov hauv qab no infographic teev qhov sib txawv ntawm bakelite thiab melamine hauv daim ntawv tabular rau sab sib piv
Summary – Bakelite vs Melamine
Bakelite thiab melamine yog cov khoom lag luam tseem ceeb organic. Bakelite yog thawj cov yas ua los ntawm cov khoom siv hluavtaws, uas suav nrog phenol thiab formaldehyde. Qhov sib txawv tseem ceeb ntawm bakelite thiab melamine yog tias bakelite yog thermosetting phenol-formaldehyde resin, whereas melamine yog ib qho amine organic compound. Bakelite yog ib qho tseem ceeb hauv kev tsim hluav taws xob hloov hluav taws xob thiab tshuab qhov chaw ntawm cov tshuab hluav taws xob, cov khoom siv hluav taws xob sib txuas, thiab lwm yam thaum melamine yog siv los tsim cov melamine resins uas yog cov yam ntxwv ruaj khov thermosetting yas uas muaj txiaj ntsig zoo hauv cov khoom siv hluav taws xob zoo nkauj
