摘要： 以三羟甲基丙烷和己内酯为原料，辛酸亚锡为催化剂，经开环聚合得到含柔性长链的液态聚己内酯多元醇（PCLs）。 再以 PCLs 为核单体，二羟甲基丙酸为臂，对甲苯磺酸为催化剂，经缩聚反应合成了两代超支化聚酯（HBPEs）。 采用 FT-IR、1H-NMR、GPC 对 HBPEs 进行结构表征，结果表明：HBPE-2 的支化度为 0.44，相对分子质量与理论相对分子质量比较接近，HBPE-1 和 HBPE-2 的相对分子质量分布系数分别为 1.70 和 1.82，聚酯的代数增加后相对分子质量分布有所变宽。 以 TDI三聚体为固化剂，对超支化聚酯 HBPEs 涂膜性能进行测试。 结果证明：根据结构设计所合成的超支化聚酯（HBPEs）的涂膜，与同类产物相比，涂膜耐冲击性和柔韧性更佳。 其中第 2 代超支化聚酯的综合性能更优异，耐冲击性 50 cm，柔韧性 1 mm，铅笔硬度 HB。

关键词: 超支化聚酯, 聚己内酯, 涂膜性能

Abstract: Poly-E-caprolactone polyols (PCLS)with long flexible chains was successfully synthesized via the ring opening polymerization with trimethylopropane and E-caprolactone as raw materials, and stannous octoate as catalyst. Two generations of hyperbranched polyesters(HBPEs)were prepared by polycondensation with 2, 2-bis(hydroxyl-methyl )propionic acid as arms, poly-E-caprolactone polyols (PCLs )as core monomer and p-toluene sulfonic acid as catalyst. The structure of HBPEs were characterized by FT-IR, 1H-NMR and GPC. The results showed that HBPE-2 gave adegree of branching 0.44, and its molecular weight approached the theoretical value. The molecular weight distribution index of HBPE-I and HBPE-2 were 1. 70 and 1. 82 respectively being wider than the theoretical value due to inherent property of polyester and side reactions thereof, etc. The film properties of HBPEs cured by toluene diisocyanate trimer were evaluated. Compared with the similar products, the HBPEs displayed excellent film properties such as impact resistance and flexibility, specifically,the second generation of hyperbranched polyesters (HBPE-2)exhibited better comprehensive properties including impact resistance 50 mm, flexibility 1 mm and pencil hardness HB.

Key words: hyperbranched polyester, poly-E-caprola, film properties