YPolypropylene vs Nylon
Polymers yog cov molecules loj, uas muaj tib lub qauv tsim rov ua dua. Cov units rov ua dua yog hu ua monomers. Cov monomers no yog sib koom ua ke nrog covalent bonds los tsim ib lub polymer. Lawv muaj qhov hnyav molecular thiab muaj ntau dua 10,000 atoms. Nyob rau hauv cov txheej txheem synthesis, uas yog hu ua polymerization, ntev polymer chains tau txais.
Muaj ob hom polymers tseem ceeb nyob ntawm lawv txoj kev sib txuas. Yog hais tias cov monomers muaj ob daim ntawv cog lus ntawm carbons, polymers tuaj yeem ua ke los ntawm kev sib txuas ntxiv. Cov polymers no hu ua ntxiv polymers. Hauv qee qhov kev cuam tshuam polymerization, thaum ob lub monomers koom nrog, ib qho me me zoo li dej raug tshem tawm. Xws li cov polymers yog condensation polymers. Polymers muaj qhov sib txawv ntawm lub cev thiab tshuaj lom neeg ntau dua li lawv cov monomers. Ntxiv mus, raws li tus naj npawb ntawm rov qab units hauv polymer, lawv cov khoom sib txawv.
Muaj ntau cov polymers tam sim no nyob rau hauv ib puag ncig ntuj, thiab lawv ua lub luag haujlwm tseem ceeb heev. Synthetic polymers kuj tau siv dav rau ntau lub hom phiaj. Polyethylene, polypropylene, PVC, nylon, thiab Bakelite yog ib co ntawm cov hluavtaws polymers. Thaum tsim cov khoom siv hluavtaws, cov txheej txheem yuav tsum tau tswj xyuas kom tau txais cov khoom xav tau ib txwm.
YPolypropylene
Polypropylene yog cov yas polymer. Nws cov monomer yog propylene, uas muaj peb cov pa roj carbon monoxide thiab ib daim ntawv cog lus ntawm ob ntawm cov pa roj carbon atom. Polypropylene yog tsim los ntawm propylene roj nyob rau hauv lub xub ntiag ntawm ib tug catalyst xws li titanium chloride. Nws yog ib qho ntxiv polymer. Nws yog ib qho yooj yim los tsim thiab tuaj yeem tsim nrog siab purity.
Polypropylene yog lub teeb hauv qhov hnyav, muaj kev tiv thaiv siab rau kev tawg, acids, organic solvents, electrolytes, thiab muaj qhov kub siab melting point. Polypropylene tsis muaj tshuaj lom thiab muaj cov khoom zoo dielectric. Polypropylene kav ntev vim nws muaj kev tiv thaiv zoo rau qaug zog. Nws yog tawv, tib lub sijhawm nws hloov tau. Feem ntau nws yog opaque. Nws tuaj yeem ua translucent lossis xim siv cov xim.
Polypropylene muaj tus nqi lag luam siab, tab sis nws yog qhov pheej yig dua piv rau lwm tus. Lawv siv rau cov kav dej, ntim khoom, khoom siv hauv tsev, thiab ntim khoom thiab cov khoom siv tsheb. Polypropylene yog degraded thaum raug tshav kub los yog UV hluav taws xob. Yog li ntawd, los ntawm kev siv UV absorbing additives, degradation yuav txo tau.
Nylon Nylon
Nylon yog polymers nrog amide ua haujlwm pab pawg. Lawv yog cov chav kawm ntawm hluavtaws polymers, thiab nws yog thawj cov khoom siv hluavtaws zoo. Tsis tas li ntawd, nws yog ib qho ntawm feem ntau siv polymers. Nylon yog cov thermoplastic thiab cov khoom siv silky.
Thaum ua ke cov polyamide zoo li nylon, molecule nrog carboxylic pawg tau hnov mob nrog cov molecule uas muaj amine pawg ntawm ob qho kawg. Nylon tau tsim los hloov cov ntaub lo lo ntxhuav los ua cov ntaub thiab cov ntaub ntawv zoo li no. Nylon tuaj yeem yog lustrous, semi-lustrous lossis npub. Lawv tuaj yeem raug rau siab elongation. Nylon tiv taus kev puas tsuaj, kab, fungi, thiab ntau yam tshuaj.
YPolypropylene vs Nylon
