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用四苯基卟啉氯化铝活性开环催化剂进行ε－己内酯（ＣＬ）和环氧丙烷（ＰＯ）嵌段共聚合，制备了ＰＣＬ－ＰＰＯ、ＰＰＯ－ＰＣＬ以及ＰＣＬ－ＰＰＯ－ＰＣＬ、ＰＰＯ－ＰＣＬ－ＰＰＯ嵌段共聚体。
PCL-PPO, PPO-PCL and PCL-PPO-PCL were prepared by the block copolymerization of ε-caprolactone (CL) and propylene oxide (PO) with tetraphenylporphyrin aluminum chloride active ring- PPO-PCL-PPO block copolymer.