Yintoni umahluko phakathi kwe-PTFE, FEP kunye nePFA?

I-PTFE kunye ne-PFA banonyamezelo olunyusiweyo lobushushu xa kuthelekiswa ne-FEP.FEP kunye ne-PFA zicacile, kodwa i-PTFE iyaguquguquka.I-FEP kunye ne-PFA zineepropati ezingcono zoomatshini xa kuthelekiswa ne-PTFE.Owona mahluko uphambili umalunga nokungangeni kweekhemikhali, ukunganyangeki komhlwa, ukuvunywa, kunye nokuvunywa kwe-FDA.

Kukho iintlobo ezininzi ze-fluoropolymers ngoku kwaye nganye inenjongo eyahlukileyo.Umahluko omncinci kulwakhiwo lwe-PTFE, i-FEP kunye ne-PFA zonke zibonelela ngeyantlukwano ezinika uluhlu olubanzi lweempawu ezingabambekiyo.

PTFE

I-Polytetrafluoroethylene, okanye i-PTFE, yayiyeyokuqala kwi-synthetic fluoropolymers ukuveliswa.Ungalazi igama layo lebhrendi elaziwa kakhulu, ipolymer, eveliswa yinkampani yaseDuPont.

PTFE mkhulu ekudaleni non-stick zokugquma kwizinto ezisetyenziselwa ukupheka kunye baking.Iibhulethi kunye nenkqubo yokuqokelela uthuli ikwasebenzisa PTFE.It is hydrophobic, ulwelo aluyi kumanzisa PTFE njengoko ine-electronegativity ephezulu.PTFE yindawo eyaziwayo kuphela apho iqungequ alinakunamathela.

FEP

I-ethylene propylene eFluorinated, okanye i-FEP, yahluke kancinane kwi-PTFE, nangona isenazo ezinye iimpawu ezifanayo zokungancamatheli zepolymer.

I-FEP ithambile kune PTFE kwaye inyibilika kubushushu obuphantsi ukuze ukubhaka kunye nokusetyenziswa kokupheka akuxhaphakanga.I-FEP icace kakhulu, ngoko ke nantoni na egqunyiweyo iya kuhlala ingumbala ofanayo.FEP iyaxhathisa kukukhanya kwelanga, ngoko ilungile kuzo zonke izicelo zemozulu.

PFA

Umahluko ophambili phakathi kwe-perfluoroalkoxy alkanes, PFA, kunye ne-PTFE ngamalungu e-alkoxy avumela i-polymer ukuba iqhutywe.

Kwinqanaba le-molecular, i-PFA inobude obuncinane bekhonkco ukuya kwezinye ii-fluoropolymers.Ikwanayo i-chain entanglement ephezulu kunezinye i-fluoropolymers.PFA ine-athomu ye-oxygen kwisakhiwo sayo.Abanye ababini abanayo le nto. Lo mahluko kulwakhiwo unika iPFA ukuhamba okuphuculweyo, ukumelana nokunyuka kunye nokuzinza kwe-thermal.

PS: Qhagamshelana nathi PTFE iimveliso ezigqityiweyo isampuli free