摘要： 分别以大分子二醇Ymer^TMN120、1,4-丁二醇和新戊二醇为核单体,二羟甲基丙酸为AB2型单体,对甲苯磺酸为催化剂,采用准一步法合成了第三代超支化聚酯HBP-1、HBP-2和HBP-3。采用FT-IR、¹ H NMR和GPC对其结构和相对分子质量进行表征,并考察了超支化聚酯的溶液黏度和特性黏度。以甲苯二异氰酸酯加成物为固化剂制备交联HBP涂膜,表征了涂膜性能。结果表明:以Ymer^TMN120为核单体的超支化聚酯HBP-1具有较高的支化度(达到0.48)和较低的相对分子质量分布指数(1.60)。HBP-1在极性溶剂中具有较好的溶解性,其特性黏度最低,为3.85 mL/g。超支化聚酯的固化膜都具有优异的附着力、柔韧性和较高的硬度。

关键词: 超支化聚酯, 核单体, 特性黏度, Ymer^TMN120

Abstract: The third generation hyperbranched polyesters (HBPs)were synthesized by a quasi-one step method with 2, 2-bis(hydroxyl-me)propionic acid as a AB₂ monomer, Ymer^TMN120, 1,4-butanediol(BDO), and neopentyl glycol( NPG)as core monomers and p-toluene sulfonic acid as the catalyst The structures and molecular weights of HBPs were characterized with FT-IR, ¹ H NMR and GPC. The solution viscosity and intrinsic viscosities were also investigated. The film properties of HBPs cured by the TDI adduct were also tested.The thermal stability of cured HBPs films were examined by thermogravi analysis (TGA). It was found that HBPs were successfully synthesized and HBP-1 showed the highest branching degree up to 0. 48 and exhibited the lowest polydispersity index 1. 60 and better solubility in polar solvents and lower intrinsic viscosity 3. 85 mL/g. All the cured HBPs films presented excellent adhesion, flexibility and higher hardness.

Key words: hyperbranched polyesters, core monomer, intrinsic viscosity, Ymer^TM N120