Abstract
In this paper, through the study of the principle and method of the preparation of rigid foam polyurethane foam, the foaming process was optimized and the best formula was obtained. The effect of thin plastering on the thermal stability of the composites was analyzed, and the mechanism of the action of coupling agent and straw fiber was discussed. Physical adding method was used to introduce thin plaster for rigid polyurethane thermal insulation material. Synergistic insulation system is formed in polyurethane system to improve its thermal insulation performance. At the same time, the failure mechanism of the straw fiber polyurethane foam was also discussed. It is concluded that the compressive strength of the straw wall reinforced foam plastics is enhanced due to the addition of thin plastering, which improves the compressive strength of the thin plastering polyurethane foam.
