| abstract |
A polymer foam and a preparation method thereof are disclosed. In the present invention, the method comprises the steps of: providing a polymer body; performing a pressure-induced flow on the polymer body at a first specific temperature, a first specific pressure, and a holding time (pressure- Induced flow, PIF) step to obtain a polymer sheet; and injecting a foaming agent onto the polymer sheet for foaming at a second specific temperature and a second specific pressure over a saturation time The step is to obtain a polymer foam. |