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。
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 （Mn） of the product is 6 135. Weight-average molecular weight （Mw） of the product is 7 438. The coefficient of distribution of molecular weight （Mw/Mn） 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.
出处
《林产化学与工业》
EI
CAS
CSCD
2006年第2期7-12,共6页
Chemistry and Industry of Forest Products
基金
河南省自然科学基金资助课题(0511021000)
