Hydrogen bond effect in thermoplastic polyurethane elastomers

摘要

hydrogen bond effects in thermoplastic polyurethane elastomers (TPU) with different chain ex- tender structures and hard segment contents have been studied quantitatively by dynamic mechani- cal analysis. It has been found that the hydrogen bond effects in TPU decrease with the increase of temperature. The temperature dependence of hydrogen bonding in TPU's can be described by the Arrhenius equation, and the activation energy of hydrogen bonding as well as the physical Cross-link density have been calculated.