Colligate the relationship between swell rate and capillary number to establish the prediction model of the swell ratio and the average cell diameter for PS/SCCO2 foaming system.

• 综合胀大比和毛细管数的关系,提出了聚苯乙烯/超临界CO2发泡体系挤出胀大和泡孔平均直径预测模型。