自Szwarc发现活性聚合物以来,二步聚合方法被广泛应用于制备窄分布的样品。二步聚合也叫播种技术(seedingtechnique),即将单体分二批加入引发剂中。一些研究工作者认为:引发剂与第一批加入的少量单体间的作用起“播种”作用,使引发剂分子好象种子发芽一样,形成分子 Since the discovery of living polymers by Szwarc, the two-stage polymerization method is widely used to prepare narrowly distributed samples. Two-stage polymerization, also known as seeding technique, involves adding monomers in two separate batches to the initiator. Some researchers believe that the role of the initiator and the first addition of small amounts of monomer play a “sowing” effect, allowing the initiator molecule to germinate like a seed to form a molecule