A process including topically applying a finely divided powder onto a plurality of polystyrene beads. The finely divided powder includes brominated compounds including a brominated alkane having at least one substituent aromatic group. The polystyrene beads are pre-expanded with the topically applied brominated compounds and a molded pattern is formed from the pre-expanded polystyrene beads. A lost foam casting mold is formed with the molded pattern. Molten metal is poured into the lost foam casting mold and onto the molded pattern to depolymerize the polystyrene beads with the topically applied brominated compounds.
一种工艺,包括在多个聚
苯乙烯珠子上局部涂抹细粉。精细粉末包括
溴化化合物,其中
溴化
烷烃具有至少一个取代芳香基团。聚
苯乙烯珠子用局部施用的
溴化化合物预膨化,并由预膨化的聚
苯乙烯珠子形成模塑图案。用模塑图案形成消失模铸造模具。将熔融
金属倒入消失模铸造模具并浇注到成型图案上,使聚
苯乙烯珠与局部应用的
溴化化合物发生解聚。