Cov txheej txheem:

Yuav ua li cas polymers tsim?
Yuav ua li cas polymers tsim?

Video: Yuav ua li cas polymers tsim?

Video: Yuav ua li cas polymers tsim?
Video: La Yang Ft. Phuab Vaj - Yuav Ua Li Cas [Official MV] 2024, Kaum ib hlis
Anonim

Thaum ntau cov molecules ntawm ib qho yooj yim compound koom ua ke, cov khoom yog hu ua a polymer thiab cov txheej txheem polymerization. Cov yooj yim tebchaw uas nws cov molecules koom ua ke los ua tus polymers hu ua monomers. Cov polymer yog ib txoj saw ntawm atoms, muab ib tug txha caj qaum, uas atoms los yog pab pawg neeg ntawm atoms koom.

Ib yam li ib tug yuav nug, ua li cas cov polymers tsim?

Polymers yog tsim los ntawm ob txoj kev tseem ceeb hu ua ntxiv thiab condensation polymerization . Ntxiv rau, polymerization , tus pib (los yog catalyst) reacts nrog ib tug pib monomer. Nyob rau hauv condensation polymerization , monomer nrog rau H (hydrogen) atom raug khi nrog lub monomer nrog OH (oxygen-hydrogen) atoms raug.

Ib yam li ntawd, cov polymers ua haujlwm li cas? Thaum monomers koom nrog lwm cov monomers los ntawm cov txheej txheem ntawm kev tsim cov ntawv cog lus, lawv tsim cov molecules loj, hu ua polymers . Yog tias nws txuas nrog peb lossis ntau dua molecules ces peb-dimensional, cross-linked structures tuaj yeem tsim [qhov chaw: Innovate Us]. Polymers tuaj yeem tshwm sim, lossis peb tuaj yeem tsim lawv.

Hauv qhov no, cov polymers tuaj ntawm qhov twg thiab lawv ua li cas?

Polymers feem ntau yog ua ntawm roj av, tab sis tsis tas li. Ntau polymers yog ua ntawm repeat units muab tau los ntawm natural gas los yog coal los yog crude roj. Tab sis lub tsev thaiv rov ua dua tuaj yeem qee zaum ua los ntawm cov ntaub ntawv txuas mus ntxiv xws li polylactic acid los ntawm pob kws lossis cellulosics los ntawm paj rwb linters.

Yuav ua li cas cov yas ua ib kauj ruam?

Ua cov yas

  1. Npaj cov khoom nyoos thiab monomers.
  2. Ua cov tshuaj tiv thaiv polymerization.
  3. Ua cov polymers rau hauv qhov kawg polymer resins.
  4. Tsim cov khoom tiav.

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