Polymer Properties - PCTFE & ETFE & ECTFE Properties

PCTFE yog semicrystalline polymer nrog helical polymer saw thiab pseudohexagonal siv lead ua.PVDF thiab equimolar ETFE yog isomers tab sis tom kawg muaj cov ntsiab lus melting ntau dua thiab qis dielectric poob dua li qub.Similar to ETFE, ECTFE terpolymer (tib yam termonomers) muaj cov tshuab zoo dua qub thiab puas thiab hluav taws xob tsis zoo dua li PTFE thiab lwm yam perfluoropolymers.

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PCTFE Khoom

PCTFE yog semicrystalline polymer nrog helical polymer saw thiab pseudohexagonal siv lead ua.Crystal kev loj hlob yog spherulitic thiab muaj folded chains.Loj loj ntawm chlorine txwv recrystallization tom qab melting thaum ua.Cov resin no muaj cov khoom zoo ntawm qhov kub thiab txias, piv rau cov yas feem ntau, txawm tias lawv tsis zoo rau lwm cov fluoropolymer tshwj tsis yog PVDF.

PCTFE muaj cov khoom thaiv tshwj xeeb thiab cov tshuaj lom neeg zoo heev.Nws raug tawm tsam los ntawm ntau cov organic solvents.

PCTFE tsis tshua muaj thermal stability thiab degrades thaum ncav cuag nws melting point, yuav tsum tau kev saib xyuas tshwj xeeb thaum lub sij hawm ua.

ETFE Properties

PVDF thiab equimolar ETFE yog isomers tab sis tom kawg muaj qhov siab dua melting point thiab qis dielectric poob dua li qub.ETFE crystallizes rau hauv chav tsev ntseeg tias yog orthorhombic lossis monoclinic.Lub molecular conformation ntawm ETFE yog ib tug ncua zigzag.Qhov no polymer yog yaj nyob rau hauv ib co boiling esters saum toj no 230 C, yog li tso cai rau kev txiav txim ntawm molecular hnyav (qhov hnyav-nruab nrab) los ntawm lub teeb tawg.ETFE muaj ntau qhov kev hloov pauv, alpha so ntawm 110 C (hloov mus rau 135 C ntawm crystallinity siab dua), beta ntawm 25 C, thiab gamma so ntawm 120 C.

ETFE terpolymers muaj cov khoom siv zoo xws li tensile thiab txiav-los ntawm kev ua haujlwm thiab qis qis dua perfluoropolymer.ETFE tiv taus hluav taws xob ntau dua li perfluoropolymers (feem ntau cuam tshuam txog 20 Mrad) thiab tuaj yeem cuam tshuam los ntawm hluav taws xob xws li hluav taws xob hluav taws xob.Crosslinking yog siv los ntxiv dag zog txiav-los ntawm kev tiv thaiv ntawm ETFE hlau rwb thaiv tsev.

ETFE muaj qhov dielectric tas li ntawm 2.6e3.4 thiab dissipation yam ntawm 0.0006e0.010 raws li zaus nce ntawm 102 mus rau 1010 Hz.

ETFE terpolymers tiv taus kev ntxhov siab tawg thiab tshuaj tua kab mob los ntawm feem ntau cov tebchaw.Muaj zog oxidizing acids, concentrated boiling sulfonic acids, thiab organic bases (amines) tua ETFE thiab txhua yam tshuaj uas cuam tshuam rau PTFE, PFA, thiab FEP.

ECTFE Khoom

ECTFE yog semicrystalline (50e60%) thiab melts ntawm 240 C. Nws muaj alpha so ntawm 140 C, beta ntawm 90 C, thiab gamma so ntawm 65 C. Conformation ntawm ECTFE yog ib tug txuas zigzag nyob rau hauv uas ethylene thiab CTFE alternate.Chav tsev ntawm ECTFE's Crystal yog hexagonal.

Zoo ib yam li ETFE, ECTFE terpolymer (tib yam termonomers) muaj cov tshuab zoo dua qub thiab puas thiab hluav taws xob tsis zoo dua li PTFE thiab lwm yam perfluoropolymer.

Dielectric qhov tsis tu ncua ntawm ECTFE yog 2.5e2.6, thiab ywj siab ntawm qhov kub thiab txias.Dissipation factor yog 0.02 thiab ntau dua li ETFE's.

ECTFE tiv taus cov tshuaj feem ntau tsuas yog cov polar kub thiab cov kuab tshuaj chlorinated.Nws tsis ntxhov siab tawg yaj hauv cov kuab tshuaj.ECTFE muaj cov khoom thaiv zoo dua rau SO2, Cl2, HCl, thiab dej dua FEP thiab PVDF.