A novel approach was established to promote favorable PP foams at low temperatures by regulating the melt crystallization behavior. The crystallization behavior of PP on supercritical CO₂ foaming was systematically studied in the presence of alcohol as co-blowing agent. The results of dissipative particle dynamics (DPD) simulations revealed that the diffusion coefficient of blowing agents in PP was enhanced with the increase of alcohol molecular weight. Alcohols had a significant effect on the melt and crystallization behavior of PP. The crystallization temperature was decreased from 88 ℃ to 82 ℃, and crystallinity declined from 17% to 9% by adding 1-decanol in 8 MPa CO₂. The addition of co-blowing agents decelerated desorption rate of blowing agents. The lower limit of foaming temperature moved further down with the carbon chain growth of alcohol, e.g., the lower temperature decreased from 145 ℃ to 130 ℃ by adding 1-decanol.

通过调节熔体的结晶行为，建立了一种在低温下促进良好的PP泡沫的新方法。在乙醇作为共发泡剂存在下，系统地研究了PP在超临界CO ₂发泡时的结晶行为。耗散粒子动力学（DPD）模拟的结果表明，发泡剂在PP中的扩散系数随醇分子量的增加而增强。酒精对PP的熔融和结晶行为具有重要影响。通过在8 MPa CO _2中添加1-癸醇，结晶温度从88℃降低到82℃，结晶度从17％降低到9％。。共发泡剂的添加降低了发泡剂的解吸速率。发泡温度的下限随着醇的碳链增长而进一步下降，例如，通过加入1-癸醇使发泡温度的下限从145℃降低至130℃。