Propylene/1-butene (PPB) copolymer foam materials are successfully prepared by supercritical CO₂ and the effects of different 1-butene content on the mechanical, crystallization, foaming, and cushioning properties of prepared PPB foam material are investigated. The decrease in hardness value (from 90 to 67), tensile strength (from 37.8 MPa to 32.5 MPa), and bending strength (from 40.6 MPa to 34 MPa) of PPB materials along with the enhanced impact strength (from 3834.3 MJ/m² to 6699.65 MJ/m²) are a result of high 1-butene content. The increased foaming ratio and broadened foaming temperature window of PPB materials achieved with increased 1-butene content. Energy absorption efficiency has enhanced (from 0.678 to 0.847), and ideal parameters also improved significantly (from 0.242 to 0.303) at the same density along with the cushioning performance of PPB foaming materials. Low-density, high 1-butene content PPB materials have a better energy absorption effect with a lower permissible stress.

通过超临界CO ₂成功地制备了丙烯/ 1-丁烯（PPB）共聚物泡沫材料，并研究了不同的1-丁烯含量对所制备的PPB泡沫材料的力学性能，结晶性能，发泡性能和缓冲性能的影响。PPB材料的硬度值（从90降低到67），抗张强度（从37.8 MPa降低到32.5 MPa）和弯曲强度（从40.6 MPa降低到34 MPa）以及增强的冲击强度（从3834.3 MJ / m ^2降低）至6699.65 MJ / m ²）是1-丁烯含量高的结果。1-丁烯含量的增加可提高PPB材料的发泡率，并扩大其发泡温度范围。能量吸收效率提高了（从0.678到0.847），并且在相同密度下，理想的参数（PPB泡沫材料的缓冲性能）也显着提高了（从0.242到0.303）。低密度，高1-丁烯含量的PPB材料具有更好的能量吸收效果和更低的许用应力。