The main difference between perfluoroalkoxy alkanes, PFA, and PTFE is the alkoxy substituents that allow the polymer to be melt-processed.
On a molecular level, PFA has a smaller chain length to other fluoropolymers.
It also has a higher chain entanglement than other fluoropolymers.
PFA has an oxygen atom in its structure. The other two do not possess this.
This difference in structure gives PFA improved flow, creep resistance and thermal stability.(Sold In Box Qty Only)