中文摘要：

为开发以C36二聚脂肪酸（Dimer fatty acid,DFA）作为改性剂或原料制成的新型改性不饱和聚酯材料,以DFA和乙二醇（Ethylene glycol,EG）为原料,对甲苯磺酸（p-toluene sulfonic acid,TSOH）为催化剂,通过直接熔融缩聚法制备了DFA-EG聚酯,并采用傅里叶红外光谱（Fourier transform infrared spectrum,FT-IR）、核磁共振氢谱（Nuclear magnetic resonance,^1H-NMR）、差式扫描量热法（Differential scanning calorimetry,DSC）、热失重分析法（Thermogravimetric analysis,TGA）、凝胶渗透色谱（Gel permeation chromatography,GPC）表征了聚酯结构、热性能、相对分子质量及其分布.结果表明：当n（DFA）∶n（EG）∶n（TSOH）=1.0∶1.4∶0.016,反应温度165℃,反应时间6 h时,酯化率可达99.30%,产物质均相对分子质量为8 643 g/mol,相对分子质量分布为1.227 8,初始热分解温度及玻璃化转变温度分别为380℃和-13.3℃.由此认为,DFA-EG聚酯可作为一种绿色环保嵌段聚酯的基体材料.

英文摘要：

For the development of C36 Dimer fatty acid （DFA） as a modifier or raw materials to make a new type of modified unsaturated polyester materials, DFA-EG polyester was synthesized by direct melt polycondensation method, with C36 dimer fatty acid （DFA） and ethylene glycol （EG） as raw materials, p-toluene sulfonic acid （TSOH） as catalyst. The resultant polyester structure was characterized by fourier transform infrared spectrum（FT-IR） and nuclear magnetic resonance （^1H-NMR）, the thermal performance was characterized by differential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）, and the relative molecular mass and its distribution of DFA-EG polyester were characterized by gel permeation chromatography （GPC）. The results showed that when n （ DFA ） ： n （EG） ： n （ TSOH ） = 1 ： 1.4： 0. 016, reaction temperature 165 ℃ and reaction time 6 h, the esterifieation rate of polyester 99. 30% could be obtained. The weight-average molecular mass was 8 643 g/mol, relative molecular mass distribution was 1. 227 8. The initial thermal decomposition temperature and glass transition temperature of 380 ℃ and - 13.3 ℃ respectively. Therefore, the DFA-EG polyester can be used as a kind of green environmental protection block polyester base material.