Qhov sib txawv ntawm ABS yas thiab polypropylene pp
Nyob rau hauv cov nqe lus ntawm cov khoom hardness thiab nqe, ABS yas muaj ntau dua hardness, zoo dua nruj me ntsis, thiab siab dua li pp yas. Qhov kub tsis kam yuav luag zoo ib yam. Txawm li cas los xij, PP muaj cov tshuaj zoo dua thiab tus nqi qis dua
Sib txawv siv
Feem ntau Abs Plastics yog cov tsis muaj tshuaj lom thiab tsis zoo, tab sis lawv yog me me nrog chav thiab muaj dej tsis haum. Tom qab soaking nyob rau hauv chav tsev rau ib xyoos, tus nqi nqus dej tsis pub tshaj 1% ntau dua li 1%, thiab cov khoom siv lub cev tsis hloov pauv. Cov nplaim dej ntawm Abs cov khoom lag luam tuaj yeem ua polished kom ua tiav kom ua tiav cov khoom zoo siab. Lub zog yog 3-5 lub sij hawm siab dua li cov yas zoo tib yam. ABS Yas siv dav hauv kev tsim khoom thiab tshuaj siv tshuaj xws li tshuab, lub dav hlau, thaum cov polypropylene PP yas muaj cov tshuaj ruaj khov zoo. Thaum pp yas yog corroded los ntawm concentrated sulfuric acid thiab hnyav hydrocarbons, thiab chloricated hydrocarbons tuaj yeem so thiab ntsws polypropylene. Lub caij no, raws li lub crystallinity nce, ua polypropylene haum rau kev tsim khoom ntau yam tshuaj lom neeg thiab cov fittings nrog kev ua haujlwm zoo.
Abs Plasticics nrog cov duab sib txawv yog cov duab ternolymers ntawm acrylonitrile (a), tab sis butadiene (b), thiab styrene (s). Cov txheeb ze cov ntsiab lus ntawm peb lub monomers tuaj yeem hloov kho kom tau yooj yim los ua ntau yam resins. ABS muaj cov yam ntxwv ntawm peb yam. Ib qho muab nws tshuaj lom neeg tawm tsam, kub tsis kam, thiab ib co degree ntawm sab nraud hardness, b muab nws cov yam ntxwv molding ntawm thermoplastic, thiab txhim kho kev ua haujlwm hluav taws xob. Yog li ntawd, ABS yas yog "cov khoom nyuaj thiab nyuaj, nrog cov khoom siv raw, zoo nqi, thiab kev thov tsawg, thiab thoob plaws kev thov nyiaj. PP yas feem ntau yog hais txog polypropylene. Cov methyl pawg npaj rau tib sab ntawm txoj saw tseem ceeb ntawm lub molecule hu ua onsotactic polypropylene. Yog tias cov methyl pawg tau teem tseg rau ob sab ntawm txoj saw tseem ceeb ntawm lub molecule, nws yog hu ua random polypropylene. Thaum methyl pab pawg ntawm ob sab ntawm cov molecular saw, lawv hu ua syndotactic polypropylene.
Yog li nyob rau hauv xaiv cov khoom xaiv zoo tib yam, peb yuav tsum txiav txim siab tag nrho cov khoom ntawm cov khoom lag luam kom txo cov nqi thiab txhim kho cov khoom lag luam thiab txhim kho cov khoom lag luam kev sib tw.