Puas yog PVC yog ib qho kev sib txuas ntawm polymer?
Puas yog PVC yog ib qho kev sib txuas ntawm polymer?

Video: Puas yog PVC yog ib qho kev sib txuas ntawm polymer?

Video: Puas yog PVC yog ib qho kev sib txuas ntawm polymer?
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Polymer ; PVC ; Kev sib txuas; Grafting; FT-IR; Thermal stability. Poly (vinyl chloride) i.e. PVC yog ib qho ntawm cov khoom siv ntau yam polymers & dav siv thermoplastic vinyl polymer . Nyob rau hauv cov nqe lus ntawm cov nyiaj tau los generated, PVC yog ib qho ntawm cov khoom tseem ceeb tshaj plaws ntawm kev lag luam tshuaj.

Tsis tas li cov lus nug yog, dab tsi yog qhov cross linked polymer?

Hla - txuas yog ib daim ntawv cog lus uas txuas ib qho polymer saw mus rau lwm tus polymer saw hlau. Yog li ntoo khaub lig - txuas polymers yog polymers uas tau thaum ntoo khaub lig - txuas daim ntawv cog lus tsim ntawm monomeric units. Hla - txuas polymers yog insoluble nyob rau hauv tag nrho cov kuab tshuaj vim cov polymer chains yog khi ua ke los ntawm cov khoom muaj zog covalent bonds.

Puas yog Bakelite yog qhov sib txuas ntawm cov polymer? Bakelite yog a ntoo khaub lig - txuas condensation polymer ntawm phenol $$(C_{6}H_{5} - OH)$$ thiab formaldehyde $$(HCHO)$$. Nws yog thermosetting yas siv los ua hluav taws xob keyboards thiab hloov boards.

Qhov sib thooj, dab tsi yog cross linked polymers muab ob qho piv txwv?

Piv txwv ntawm crosslinked polymers Xws li: Polyester fiberglass, polyurethanes siv los ua txheej txheej, nplaum, roj hmab vulcanized, epoxy resins thiab ntau ntxiv.

Dab tsi yog qhov txawv ntawm linear polymer thiab cross-linked polymer?

Tus yuam sij qhov sib txawv ntawm tus ntoo khaub lig - txuas polymer thiab cov linear polymer yog hais tias cov monomer units ntawm linear polymers muaj qhov kawg-rau-kawg txuas, zoo li cov hlaws dai hauv caj dab, whereas ntoo khaub lig - txuas polymers yog ua los ntawm chains uas tau koom ua ke los ntawm ib tug series ntawm covalent bonds, hu ua ntoo khaub lig - txuas.

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