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聚己内酯(PCL)是一种环境友好、生物相容性和生物可降解性良好的高分子材料,在生物医学、涂料和包装等领域中得到广泛应用。以价格低廉的乙酰丙酮和四氯化钛为原料,采用简单易制的方法制得乙酰丙酮钛;然后以此作为ε-己内酯(ε-CL)单体的催化剂,采用本体开环聚合法制备了高转化率和高Mη(黏均相对分子质量)的PCL。研究结果表明:当n(ε-CL)∶n(催化剂)=150∶1、聚合时间为210 min和聚合温度为110℃时,所得PCL的转化率(99.5%)和M_η(2.662×10~4)相对最大。
Polycaprolactone (PCL) is an environmentally friendly, biocompatible and biodegradable macromolecule material that is widely used in biomedical, coatings and packaging applications. Acetylacetone and titanium tetrachloride are used as raw materials to prepare titanium acetylacetonate by a simple and easy preparation method. Then, the catalyst is used as a catalyst of ε-caprolactone (ε-CL) monomer, and the ring-opening polymerization Method to prepare a high conversion rate and high Mη (viscosity average molecular weight) PCL. The results showed that the conversion of PCL (99.5%) and M_η (2.662 × 10 ~ (-1)) were obtained when n (ε-CL): n (catalyst) = 150:1, polymerization time was 210 min and polymerization temperature was 110 ℃. 4) Relative maximum.