<p>In the present study, the exploration focuses on the relationship between relaxation time and strain rate in polymer-bonded sugar (PBS). This investigation encompasses a wide range of strain rates varying from 10⁻⁵ s⁻¹ to 10⁵ s⁻¹, covering 11 orders of magnitude from quasi-static to intensive impact loading. Stress and strain curves of the material were acquired through quasi-static compression, Split-Hopkinson Pressure Bar (SHPB), and first-stage light gas gun experiments at various loading speeds. These curves exhibit a noticeable correlation with strain rate, suggesting the presence of a viscosity effect on the material. The Maxwell model is employed to characterize the stress-strain curves. The findings verify that the strain rate dependence of relaxation time follows a power law relationship across static loading to intensive impact conditions.</p>