From my understanding, both PVB and TPU form a combination of Hydrogen bonds, Van der Waals forces and chemical bonds with the hydroxyl groups of the glass surface. Is it true that PVB has a higher probability of forming chemical bonds with the surface than PU does, therefore PVB has a stronger bond with the glass surface?
Any input is greatly appreciated.
Probably polyurethane as in PVB, some of the hydroxyl groups of polyvinyl alcohol are replaced hydrophobic butyral.
Thank you for your response Mohammad. While pvb does lose some of its hydroxyl binding sites to the butyral section of the polymer, doesn't pvb still have more hydroxyl groups and possible hydrogen bonding sites than a typical TPU chain? Unless I am going down the wrong thought process...
Undoubtedly PVB is better. They make glass for car windshields laminated with PVB, and architectural glass "sandwich" for windows.
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