【摘要】 以妥尔油脂肪酸二聚酸为原料,先与聚乙二醇(PEG 400)缩聚后得到聚酯,然后再用松香对聚酯封端,制备了松香基聚酯醚型非离子高分子表面活性剂,并对其性能进行了研究。聚酯适宜的制备工艺条件:减压条件下,反应物二聚酸与聚乙二醇的摩尔比为1∶1.20,催化剂SnC l2用量为二聚酸质量的0.30%,反应温度200℃,反应时间6 h,酯化率达到98.11%。产物的数均相对分子质量(Mn)6 135,重均相对分子质量(Mw)7 438,相对分子质量分布系数(Mw/Mn)为1.212且呈好的窄分布状态。正交试验优化后的松香封端反应的条件为:再补加聚酯质量0.20%的催化剂SnC l2,聚酯与松香物质的量之比为1∶1.30,反应温度215℃,反应时间2.8 h,封端率达62.75%。红外光谱验证了目标产物的存在。性能研究表明,产物具有很好的钙皂分散力、消泡和抑泡力、乳化性和乳化稳定性。更多还原

【Abstract】 A new kind of non-ionic polymeric surfactant,the dimeric fatty acid（DFA）/polyethylene glycol（PEG） polyester terminated with rosin acid,was prepared with rosin acid and a polyester which was synthesized from DFA and PEG 400,and its surface activities were studied.The optimum reaction conditions of esterification were as follows: molar ratio of DFA /PEG 400 1 ∶1.20,stannous chloride as the preferable catalyst at amount（0.30%） of DFA,reaction temperature（200℃）,reaction time 6 h,the conversion can reach（98.11%）.Number-average molecular weight（M_n） of the product is 6 135.Weight-average molecular weight（M_w） of the product is 7 438.The coefficient of distribution of molecular weight（M_w/M_n） is 1.212,which indicates a narrow distribution of molecular weight.Orthogonal experiment results of rosin acid terminated reaction of dimeric fatty acid polyethylene glycol polyester showed that optimum reaction conditions were as follows: molar ratio of materials n（DFA/PEG polyester） ∶n（rosin acid） 1 ∶1.30,dosage of catalyst SnCl₂（0.20%） of polyester,reaction temperature（215℃）.After 2.8 h,termination ratio of the end hydroxyl groups of polyester reached（62.75%）.Rosin acid terminated DFA/PEG polyester surfactant has excellent emulsification properties,emulsification stability,power to disperse calcium soap as well as（performances） of defoaming and inhibiting foaming.更多还原