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首先以马来海松酸三缩水甘油酯(MPTGE)和马来海松酸(MPA)为主要原料,一步法合成松香基超支化聚酯(HPR),然后HPR再与环氧氯丙烷(ECH)经开环酯化、闭环反应,得到松香基超支化环氧树脂(HPER)。讨论了开环酯化、闭环反应中各因素对产物性能的影响,采用凝胶色谱仪、红外光谱仪对合成产物进行了表征,并确定了适宜的工艺条件:氯丙烷(ECH)与超支化聚酯(HPR)物质的量比为18∶1,开环反应以四丁基溴化铵为催化剂,用量为反应物总质量的2%,反应温度100℃;闭环反应中以氢氧化钠溶液作为中和剂,50℃下反应3 h。所得环氧树脂的环氧值为0.23 mol/100 g,粘度为850 mPa.s。
Firstly, rosin-based hyperbranched polyesters (HPR) were synthesized in one-step using MPTGE and MPA as the main raw materials, and then reacted with epichlorohydrin (ECH) via HPR Ring-opening esterification, closed-loop reaction, to give rosin-based hyperbranched epoxy resin (HPER). The effects of various factors on the properties of the products such as ring-opening esterification and ring-closure reaction were discussed. The products were characterized by gel chromatography and infrared spectroscopy, and the suitable technological conditions were confirmed: the reaction of chloropropane (ECH) with hyperbranched poly (HPR) material ratio of 18: 1, the ring-opening reaction with tetrabutylammonium bromide as catalyst, the amount of 2% of the total mass of the reactants, the reaction temperature was 100 ℃; sodium hydroxide solution as a closed-loop reaction as Neutralizer, at 50 ℃ for 3 h. The resulting epoxy had an epoxy value of 0.23 mol / 100 g and a viscosity of 850 mPa.s.