Qhov sib txawv tseem ceeb ntawm Delrin thiab acetal yog tias Delrin yog cov khoom siv polymer uas muaj qhov rov ua dua (CH2O) thaum acetal yog ib pawg ua haujlwm muaj cov tshuaj formula R2C(OR') 2.
Cov khoom siv polymer Delrin yog qee zaum hu ua acetal; Yog li, nws feem ntau tsis meej pem nrog lub sij hawm acetal, uas piav txog ib hom kev ua haujlwm hauv cov organic chemistry.
Delrin (los yog POM) yog dab tsi?
Delrin yog lub npe lag luam rau cov khoom siv polymer polyoxymethylene lossis POM. Nws tseem muaj npe hu ua acetal, polyacetal thiab polyformaldehyde hauv polymer chemistry. Nws yog ib yam khoom siv thermoplastic engineering uas muaj txiaj ntsig zoo hauv cov khoom precision uas yuav tsum tau muaj kev nruj nruj, tsis muaj kev sib txhuam, thiab qhov zoo ntawm qhov ntev. Nws yog ib hom khoom siv hluavtaws polymer. Cov khoom no yog tsim los ntawm cov tuam txhab tshuaj sib txawv nrog cov qauv sib txawv me ntsis, thiab cov no yog muag siv cov npe sib txawv, suav nrog Delrin, Kocetal, Ultraform, Celcon, thiab lwm yam.
Daim duab 01: Cov qauv ntawm Kev Rov Ua Haujlwm ntawm Delrin Polymer
Raws li cov yam ntxwv, peb tuaj yeem soj ntsuam lub zog siab, hardness thiab rigidity ntawm qhov kub thiab txias. Intrinsically, cov khoom no yog opaque dawb, uas tshwm sim vim nws siab crystalline muaj pes tsawg leeg. Txawm li cas los xij, nws muaj nyob rau hauv cov xim sib txawv thiab hauv kev lag luam nplai.
Thaum xav txog kev tsim khoom ntawm Delrin, peb tuaj yeem tsim nws hauv homopolymer lossis hauv daim ntawv copolymer. Peb tuaj yeem tsim cov homopolymer los ntawm cov tshuaj tiv thaiv ntawm aqueous formaldehyde nrog cawv los tsim cov hemiformal, lub cev qhuav dej ntawm hemiformal / dej sib tov, ua raws li kev tso tawm ntawm formaldehyde los ntawm cua sov lub hemiformal. Tom qab ntawd, lub hemiformal yog polymerized los ntawm anionic catalysis kom tau cov khoom xav tau.
Acetal yog dab tsi?
Acetal yog pab pawg ua haujlwm muaj cov tshuaj formula R2C(OR')2. Nyob rau hauv cov tshuaj no, cov pawg R yog cov organic fragments los yog hydrogen thaum lub R' pawg tsuas yog cov organic fragments tab sis tsis hydrogen. Ntxiv mus, ob pawg R' tuaj yeem sib npaug rau ib leeg, muab qhov sib luag acetal. Yog tias lawv tsis sib npaug, ces peb tuaj yeem tau txais kev sib xyaw acetal.
Daim duab 02: Cov qauv tshuaj ntawm Acetal Functional Group hauv Organic Chemistry
Feem ntau, acetals hloov mus rau aldehydes lossis ketones. Yog li ntawd, lawv muaj tib lub xeev oxidation ntawm lub hauv paus carbon atom. Txawm li cas los xij, cov ntaub ntawv hloov pauv tau muaj qhov sib txawv ntawm cov tshuaj lom neeg ruaj khov thiab muaj kev cuam tshuam thaum piv rau cov tshuaj sib xyaw carbonyl. Ntxiv mus, lub hauv paus carbon atom ntawm ib pawg acetal muaj qhov valency ntawm plaub - lub ntsiab lus, plaub covalent bonds nyob ib ncig ntawm nws, ua rau cov pa roj carbon monoxide saturated. Tsis tas li ntawd, qhov chaw carbon no muaj tetrahedral geometry.
Qhov txawv ntawm Delrin thiab Acetal yog dab tsi?
Delrin thiab acetal yog cov organic tebchaw tseem ceeb. Delrin yog lub npe lag luam rau cov khoom siv polymer polyoxymethylene lossis POM. Qhov sib txawv tseem ceeb ntawm Delrin thiab acetal yog tias Delrin yog cov khoom siv polymer uas muaj qhov rov ua dua tshiab (CH2O) thaum acetal yog pawg ua haujlwm muaj cov tshuaj formula R2C (OR') 2. Tsis tas li ntawd, Deril muaj ntau qhov rov ua dua ntawm CH2O thaum acetal muaj cov saturated tetrahedral carbon centre bonded rau ib pawg R (los yog hydrogen atom), ob pawg R'O thiab hydrogen atom.
Hauv qab infographic teev qhov sib txawv ntawm Delrin thiab acetal hauv daim ntawv tabular.
Summary – Delrin vs Acetal
Feem ntau, lo lus acetal yog siv los ua ib lo lus dav dav los piav txog Delrin. Txawm li cas los xij, lo lus acetal hauv organic chemistry piav qhia txog cov organic chemical functional group. Qhov sib txawv tseem ceeb ntawm Delrin thiab acetal yog tias Delrin yog cov khoom siv polymer uas muaj qhov rov ua dua tshiab (CH2O) thaum acetal yog pawg ua haujlwm muaj cov tshuaj formula R2C (OR') 2.
