A small amount of oil-soluble initiator, BPO, was dissolved in the aqueous phase and some monomer was polymerized for the water soluble of monomer, when acrylonitrile (AN) suspension polymerization was taken.

• 在AN的悬浮均聚反应中，由于单体AN有相当部分溶于水，同时也有少量的BPO被带到了水相，从而有水相聚合发生，但与总的聚合转化率相比，这部分水相聚合往往可以忽略不计。