Video: Polymer txheej yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A polymer txheej yog xim los yog txheej uas yog ua nrog polymers . A polymer yog ib yam khoom uas muaj cov qauv molecular uas feem ntau muaj ntau qhov sib xws. Qhov no suav nrog cov khoom siv hluavtaws organic xws li resins thiab plastics.
Hais txog qhov no, dab tsi yog polymer txheej ntawm cov puav?
Peb shaved cov puav muag los yog ib bat shavingservice tuaj nrog ib tug tshwj xeeb formulated polymer txheej . Nws yuav yog qhov zoo tshaj plaws piav raws li cov khoom siv roj hmab uas khi rau lub thoob rau lub foob zoo. Peb Yooj Yim Polymer chim Txheej yog sprayed rau kom durability thiab txo cov sib xyaw ua ke.
Ib yam li ntawd, coatings siv rau dab tsi? Polymeric txheej txheej tiv thaiv cov khoom kho los ntawm huab cua, UV rays thiab corrosion. Nonporous thiab nonreactive txheej txheej kuj yog siv rau kab tso tsheb hlau luam uas muaj dej, roj thiab tshuaj lom neeg uas tuaj yeem ua rau cov hlau lossis pob zeb ua kom puas. Feem ntau muaj kev lag luam txheej txheej muaj ob peb hom ntawm cov saw ntev molecules hu ua polymers.
Kuj paub yog, dab tsi yog cov polymer siv rau kev luam ntawv thiab txheej?
Nto saib thiab ua tau zoo dua thaum coated nrog styrene acrylic thiab acrylic polymer emulsions los yog nrog astyrene-butadiene latex, tag nrho cov ntawm lawv tsim los txais tus cwj mem, tsim gloss, tsim ib qho thaiv, thiab lwm yam.
Polymer resin yog dab tsi?
Polymer yog ib tug loj molecule uas muaj ntau repeating subunits. Resin yog ib yam khoom khov los yog viscous uas muab ib polymer tom qab kho. Resins Nws tuaj yeem yog besynthetic lossis ntuj thiab feem ntau yog cov khoom sib xyaw ntawm cov organic. Tom qab polymerization los yog kho, resins daim ntawv polymers.
Pom zoo:
Dab tsi yog txheej txheej sab nraud ntawm lub hnub hu ua?
Cov txheej sab hauv yog Core, Radiative Zone thiab Convection Zone. Cov txheej txheej sab nrauv yog Photosphere, Chromosphere, Thaj Chaw Hloov Pauv thiab Corona
Dab tsi yog txheej txheej exosphere?
Sab saum toj ntawm exosphere cim kab ntawm lub ntiaj teb huab cua thiab interplanetary qhov chaw. Lub exosphere yog txheej txheej sab nraud ntawm lub ntiaj teb huab cua. Nws pib ntawm qhov siab ntawm 500 km thiab tawm mus txog 10,000 km
Dab tsi yog txheej txheej ntawm prokaryotic cell?
Ntau tus prokaryotes muaj cov nplaum nplaum sab nraud hu ua capsule, uas feem ntau yog ua los ntawm polysaccharides (qab zib polymers). Lub capsule pab prokaryotes cling rau ib leeg thiab rau ntau qhov chaw hauv lawv ib puag ncig, thiab tseem pab tiv thaiv lub cell los ntawm ziab tawm
Cov txheej txheej ntawm lub ntiaj teb yog dab tsi?
Lub ntiaj teb tuaj yeem muab faib ua peb txheej tseem ceeb: lub hauv paus, lub mantle thiab crust. Txhua txheej ntawm cov txheej no tuaj yeem muab faib ua ob ntu: sab hauv thiab sab nraud, sab sauv thiab qis mantle thiab sab av loj thiab dej hiav txwv crust
Dab tsi yog txheej txheej ntawm vuam rods ua los ntawm?
Cellulose coated electrodes tiv thaiv cov hlau molten nrog ib tug gaseous cheeb tsam nyob ib ncig ntawm lub arc thiab weld cheeb tsam. Cov pob zeb hauv av coated electrode tsim cov slag deposit. Lub shielded arc los yog hnyav coated electrodes yog siv rau vuam steels, cam khwb cia hlau, thiab nyuaj surfacing