低密度PMP聚合物泡沫成型控制

Fabrication control of low density PMP foams

为了进一步提高低密度聚-4-甲基-1-戊烯(PMP)聚合物泡沫的成型性能,满足惯性约束聚变物理实验的需求,采用热诱导倒相法结合原位成型和机械加工来进行低密度PMP聚合物泡沫的成型控制研究。研究结果表明:在热诱导倒相法制备过程中,聚合物溶液形成凝胶后施加气压,再将其在加压状态下在液氮中淬火,可以大大减少得到的PMP/溶剂混合体中大的孔洞,提高其强度,并且在溶剂脱除后PMP泡沫收缩形变小,微观结构更加均匀,孔径更加细小。采用原位成型和机械加工的方法,可以实现低密度PMP聚合物泡沫的精密成型控制。

To improve the forming performance of low density polymer foams and to meet the requirement of ICF physical experiments,the forming control of low density polymer foams was studied using thermally induced phase-inversion technique combined with in situ moulding or machining.The results indicate that the fine structure and homogeneity of the foam were preserved by quenching the liquid gel to liquid nitrogen under appropriate nitrogen pressure,and after the solvents being released,the resulted PMP foams had higher strength,more uniform microstrucure and finer pore size.By using in situ moulding or machining,precision forming control of low density PMP foams could be achieved.