Tailored Dynamic Viscoelasticity of Polyurethanes Based on Different Diols.

ABSTRACT: The development of damping and tire materials has led to a growing need to customize the dynamic viscoelasticity of polymers. In the case of polyurethane (PU), which possesses a designable molecular structure, the desired dynamic viscoelasticity can be achieved by carefully selecting flexible soft segments and employing chain extenders with diverse chemical structures. This process involves fine-tuning the molecular structure and optimizing the degree of micro-phase separation. It is worth noting that the temperature at which the loss peak occurs increases as the soft segment structure becomes more rigid. By incorporating soft segments with varying degrees of flexibility, the loss peak temperature can be adjusted within a broad range, from -50 °C to 14 °C. Furthermore, when the molecular s

SUBMITTER: Wang J 

PROVIDER: S-EPMC10302606 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature