Low viscosity aromatic hyperbranched polyester epoxy resin (HTBE) was synthesized by the reaction between epichlorohydrin (ECH) and carboxyl-end hyperbranched polyester (HTB) which was prepared from inexpensive materials A2 (1,4-butanediol glycol, BEG) and B₃ (trimellitic anhydride, TMA) by pseudo one-step method. The molar mass of the HTB was calculated from its acid value by “Recursive Probability Approach”. The degree of branching (DB) of the HTB was characterized by model compounds and¹H NMR-minus spectrum technology, and the DB of the HTB was about 0.47∼0.63. The viscosity and epoxy equivalent weight of the HTBE were 3,600∼5,000 cp and lower than 540 g/mol respectively. The reaction mechanism and structure of the AB₂ monomer, HTB and HTBE were investigated by MS,¹H NMR and FTIR spectra technology. The molecular size of HTBE is under 8.65 nm and its shape is ellipsoid-like as determined by molecular simulation.

中文翻译：

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低粘度芳族超支化聚酯环氧树脂的合成与表征

通过表氯醇（ECH）与羧基端超支化聚酯（HTB）之间的反应合成了低粘度芳族超支化聚酯环氧树脂（HTBE），后者由廉价的材料A2（1,4-丁二醇，BEG）和B ₃（偏苯三酸酐（TMA）的拟一步法。通过“递归概率法”由其酸值计算出HTB的摩尔质量。通过模型化合物和¹ H NMR-负谱技术对HTB的支化度（DB）进行了表征，HTB的DB约为0.47〜0.63。HTBE的粘度和环氧当量分别为3,600〜5,000 cp和低于540 g / mol。AB ₂的反应机理与结构通过MS，¹ H NMR和FTIR光谱技术研究了单体，HTB和HTBE 。HTBE的分子大小在8.65nm以下，并且通过分子模拟确定其形状为椭圆形。