Polycaprolactone block copolymer and preparation method thereof

The invention discloses a polycaprolactone block copolymer and a preparation method thereof. According to the invention, a simple organic aluminum compound is used as a catalyst, gamma-site and alpha-modified epsilon-caprolactone monomers are used as one of polycaprolactone monomers, and polymerization is carried out at a low reaction temperature to obtain the terminated polycaprolactone polymer beneficial to a cross-linking reaction. The polycaprolactone material is composed of lactide, ethylene oxide and methoxypolyethylene glycol as monomers, and the obtained polycaprolactone material is easier to degrade. 本发明公开了一种聚己内酯嵌段共聚物及其制备方法。本发明中以简单有机铝化合物为催化剂，以γ位和α修饰的ε-己内酯单体作为聚己内酯单体组成之一，在较低反应温度下聚合得到有利于交联反应的端基化聚己内酯聚合物。采用丙交酯、环氧乙烷、聚乙二醇单甲醚为单体组成，获得的聚己内酯材料更易于降解。