Bio-absorbable polymers such as vascular stent and suture thread for use as materials for clinical practice have almost definite dynamic properties such as tensile strength and degradation rate for absorption. When the dynamic properties thereof are elevated, therefore, the bio-absorbable polymers turn fragile, involving slower degradation rate. When the degradation rate is elevated, further, the dynamic properties are deteriorated. Disadvantageously, such bio-absorbable polymers have limited purposes for use and limited sites for use. Thus, copolymerization of bio-absorbable polymers with a cyclic depsipeptide to form a copolymer of the ring-opened and copolymerized depsipeptide can allow the adjustment of the dynamic properties and degradation rate of the resulting copolymer depending on the content of the depsipeptide.
生物可吸收聚合物(如血管支架和缝线)作为临床实践材料,几乎具有明确的动态特性,如拉伸强度和吸收降解速率。因此,当这些动态特性提高时,
生物可吸收聚合物变得脆弱,降解速率变慢。当降解速率提高时,动态特性会受到损害。不利的是,这种
生物可吸收聚合物的用途和使用场所有限。因此,通过将
生物可吸收聚合物与环状依赖肽共聚合,形成环开放和共聚合依赖肽的共聚物,可以根据依赖肽的含量调整所得到的共聚物的动态特性和降解速率。