A hyperbranched polyester with carboxyl end group (HPC) was synthesized by using trimellitic anhydride and neopentyl glycol as raw materials via A₂ + B₃ polycondensation. Then, waterborne hyperbranched polyester acrylate (WHPC) was synthesized by partially modifying the carboxylic groups of HPC with glycidyl methacrylate. In order to explore the influence of molecular weight, acrylate groups content, and ion groups content on performances, a series of WHPC films with different molecular weight, acrylate groups content, and ion groups content were prepared. The dynamic light scattering spectrometer analysis shows that the higher ionic groups content and the lower molecular weight cause the smaller particle size. The ionic group content has a positive effect on the solubility. The smaller molecular weight and particle size cause the lower viscosity. The Fourier-transform IR spectrophotometer reveals that the double bond final conversion increased with increasing acrylate groups content. The final conversion is between 69 and 86%. The curing speed is fast, and the curing time is about 70 s due to the numerous end groups owned by the hyperbranched structure. The dynamic mechanical thermal analysis coupled with end-use mechanical property tests illustrates that the crosslink density has a positive effect on the storage modulus and a negative effect on the flexibility. It is also found that glass transition temperature and pencil hardness are determined by the balance between crosslink segment and hyperbranched polyester segment. The thermogravimetric analysis proves that increased crosslink density and molecular weight promote the heat resistance of films. This work utilizes a novel hyperbranched structure that excels in viscosity, flexibility, and water solubility. Furthermore, the preparation process is convenient.

以偏苯三酸酐和新戊二醇为原料，通过A ₂  + B ₃合成具有羧基端基的超支化聚酯（HPC）。缩聚。然后，通过用甲基丙烯酸缩水甘油酯部分改性HPC的羧基来合成水性超支化聚酯丙烯酸酯（WHPC）。为了探索分子量，丙烯酸酯基含量和离子基含量对性能的影响，制备了一系列不同分子量，丙烯酸酯基含量和离子基含量的WHPC薄膜。动态光散射光谱仪分析表明，较高的离子基团含量和较低的分子量导致较小的粒径。离子基团含量对溶解度有积极影响。较小的分子量和粒度导致较低的粘度。傅里叶变换红外分光光度计表明，双键的最终转化率随丙烯酸酯基含量的增加而增加。最终转化率为69％至86％。固化速度快，由于超支化结构拥有许多端基，因此固化时间约为70 s。动态机械热分析以及最终用途的机械性能测试表明，交联密度对储能模量有积极影响，而对柔韧性有负面影响。还发现玻璃化转变温度和铅笔硬度由交联链段和超支化聚酯链段之间的平衡决定。热重分析表明，增加的交联密度和分子量可提高薄膜的耐热性。这项工作利用了一种新型的超支化结构，该结构在粘度，柔韧性和水溶性方面表现出色。此外，制备过程方便。