Molecular structural characteristics of polytetrafluoroethylene microporous membrane
The excellent performance of polytetrafluoroethylene microporous membrane is determined by its molecular structure.
The molecule of polytetrafluoroethylene is composed of two elements, c and F, combined by covalent bonds. The C-F bond has a higher bond energy. To break the C-F bond requires a larger bond energy, so polytetrafluoroethylene Ethylene microporous membrane has a high degree of stability and is not prone to chemical reactions.
Although polytetrafluoroethylene and polyethylene are both linear polymers, and the chain skeletons are composed of carbon atoms, the roles played by fluorine atoms and oxygen atoms around carbon atoms are different.
The van der Waals radius of a fluorine atom is O. 136nm is significantly larger than the van der Waals radius of hydrogen atoms, which is O.11-0.12nm. Compared with polyethylene, there is a strong repulsive force between unchained atoms in polytetrafluoroethylene, which causes the macromolecules of polytetrafluoroethylene to adopt a helical configuration. Rather than the planar all-trans configuration of polyethylene.
?Due to the large van der Waals radius of fluorine atoms, the repulsive force between fluorine atoms is large, which makes the rotation barrier of the polytetrafluoroethylene macromolecular chain much larger than that of polyethylene, so it can be expected that polytetrafluoroethylene Ethylene chains are less flexible than polyethylene chains.
This gives the PTFE microporous membrane a high melting point and high melt viscosity.
? is a high-tech enterprise specializing in the research, development, production and sales of fluorine material films. It strives for excellence in product quality and occupies a dominant position in the market with its unique and stable performance.
The ptfe materials produced are all imported raw materials, with a full set of advanced production equipment, an advanced clean room and an independent composite slitting workshop to ensure the production quality of membrane materials.
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