Qhov sib txawv ntawm ETFE thiab PTFE ntaub ntawv
ETFE (ethylene-tetrafluoroethylene copolymer) thiab PTFE (polytetrafluoroethylene) yog ob qhov kev ua tau zoo fluoroplastics, sib txawv hauv cov qauv tshuaj, cov khoom siv kho tshuab, cov yam ntxwv ua haujlwm, thiab kev siv. ETFE, thaum tuav PTFE's zoo heev tshuaj tiv thaiv, ho txhim kho txhua yam muaj zog thiab kev ua tau zoo, tab sis nws kub kuj yog me ntsis qis. PTFE, ntawm qhov tod tes, muaj npe nrov rau nws qhov kub thiab txias tsis kam thiab tshuaj lom neeg ruaj khov, tab sis nws nyuaj rau kev ua haujlwm ntau dua. Hauv qab no yog cov ncauj lus kom ntxaws sib piv ntawm ob los ntawm ntau qhov kev xav.
Chemical Structure thiab Basic Properties
- PTFE: Polymerized los ntawm tetrafluoroethylene monomers, nws cov qauv molecular yog tag nrho encapsulated los ntawm fluorine atoms. Nws muaj crystallinity siab thiab tsis tshua muaj zog chemical inertness, tau txais nws lub npe ntawm "King of Plastics."
- ETFE: Ib qho alternating copolymer ntawm ethylene thiab tetrafluoroethylene. Kev taw qhia ntawm ethylene units mus rau hauv cov saw molecular txo cov fluorine cov ntsiab lus, yog li txhim kho toughness thiab processability, tab sis nws cov tshuaj tiv thaiv yog me ntsis qis dua. PTFE.
Mechanical Properties Sib piv
- Lub zog thiab Toughness: ETFE boasts lub zog tensile txog li 50 MPa, ob zaug ntawm PTFE, thiab elongation ntawm 100% -300%, nthuav tawm kev cuam tshuam zoo heev; PTFE, ntawm qhov tod tes, yog tus nkig tab sis muaj siab dua tsim kua muag.
- Coefficient of Friction: Ob leeg muaj coefficient tsis tshua muaj kev sib txhuam, tab sis PTFE muaj kev hnav zoo dua, thaum ETFE yog qhov tsim nyog rau cov khoom siv uas xav tau siab toughness.
Kev ua tau zoo
- ETFE: Melt-processable (xws li, extrusion, txhaj tshuaj molding), nrog ib tug qis molding kub (240-270 ℃), haum rau tsim complex duab.
- PTFE: High melting point (327 ℃) thiab melting viscosity siab heev, ua melt-processable; feem ntau ua tiav siv sintering lossis nias cov txheej txheem, ua rau cov nqi ua haujlwm siab.
