Different structural perfluoropolyether(PFPE) and suppliers
A perfluorinated polymer containing ether bonds, a colorless, odourless, transparent oily liquid at normal temperature. 
Molecular structure: contains only C, F, O three elements, so that these materials can be used under extreme conditions, can be stable in corrosive chemicals and oxidative environments. 
The main trade names are Krytox (DuPont/Chemours), Demnum (Daikin), Fomblin (Solvay) and Juhua. 

DuPont/Chemour's PFPE is a K-type structure.

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 When n ≥ 3, the molecular formula is shown as a high molecular weight perfluoropolyether. 
High molecular weight K-type perfluoropolymer is a perfluoropolymer made of hexafluoroepoxide propane (HFPO) as raw material, in non-proton solvent with fluorine ions as catalyst for open-loop polymerization, re-sealing. K-type perfluoropolymer has different uses according to the high and low molecular weight, commonly used K-type polymer relative molecular mass is 103 ~ 104. High molecular weight perfluoropolymer can prepare fluorine ether oil, low molecular weight perfluoropolymer can be used to synthesize fluorocarbon surfactants.

Solvay and Juhua's PFEP are Y-type structures. 

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The preparation method of Y-type perfluoropolyether is similar to the preparation method of Z-type perfluoropolyether, the polymer monomer is changed to hexafluoropropylene, a straight chain polymer formed by photooxidation under the action of ultraviolet light.

Different structures of PFP can play the best performance in different use environments, please consult customer service in specific cases.

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