含聚氧乙烯链端树枝状聚(胺-酯)的合成及性能

Synthesis and Properties of Dendritic Poly( amine-ester) with Polyoxyethylene Chain

以端基为8个伯氨基的树枝状化合物〔PAE(NH2)8〕和聚氧乙烯〔PEO-A(454)〕或丙烯酸钠(SAA)与聚氧乙烯为原料合成了含聚氧乙烯链端树枝状聚(胺-酯)(PAE-PEO-A和PAE-SAA-PEO-A)。通过正交实验讨论了反应温度、反应时间及原料配比对产物产率的影响,并用FTIR、1HNMR、13CNMR及GPC对试样进行结构表征。测定了含聚氧乙烯链端树枝状聚(胺-酯)的表面张力及对苯甲酸、水杨酸的增溶性。实验结果表明,当反应温度为65℃,反应时间为96 h,原料的配比量n〔PAE(NH2)8〕∶n[(PEO-A(454)]=1∶16,以甲醇为溶剂,产物产率为88.30%。PAE-PEO-A溶液的临界胶束质量浓度为0.007 5 g/L,最小表面张力为43.8 mN/m。PAE-PEO-A对苯甲酸、水杨酸都有增溶性,且增溶能力随着它们的表面官能团数的增多和浓度的增加而增大。当反应温度为50℃,反应时间为96 h,原料的配比量n〔PAE(NH2)8〕∶n(SAA)∶n〔PEO-A(454)〕=1∶12∶8,以甲醇为溶剂,产物产率为48.83%。PAE-SAA-PEO-A水溶性极好,其表面张力与水接近,几乎不具有表面活性。PAE-SAA-PEO-A对苯甲酸和水杨酸有良好的增溶性,尤其是对水杨酸的增溶性明显。在相同质量浓度0.500 g/L时,PAE-SAAPEO-A对水杨酸的增溶量约为PEG-400的2.4倍。

Dendritic poly （amine-ester） with polyoxyethylene chain （ PAE-PEO-A and PAE-SAA-PEO- A） was synthesized from a dendrimer with 8 primary amine as the terminal group [PAE （NH2）8] and poly （ ethylene oxide） [ PEO-A （ 454 ） ] or sodium acrylate （SAA） and poly （ ethylene oxide）. The effects of reaction temperature, reaction time and ratio of reactants on the yield of products were investigated by an orthogonal experiment. The structure of the products was identified by FTIR, 1HNMR, 13 CNMR and GPC. The surface tension of dendritic poly （amine-ester） with polyoxyethylene chain and their solubilization effects for benzoic acid and salicylic acid were determined. It was found that, when the reaction temperature was 65℃, reaction time was 96 h, n [ PAE （ NH2 ） 8 ] ：n [ PEG-A （454） ] = 1 ： 16, and CH3OH was used as solvent, the yield was 88.30%. The critical micelle mass concentration of PAE-PEO-A solution was 0. 0075 g/L. Its lowest surface tension was 43.8 mN/m. PAE-PEO-A had a solubilization on benzoic acid and salicylic acid. The solubilization capacity increased with the increasing number of surface functional groups and concentrations. It was found that, when the reaction temperature was 50℃, reaction time was 96 h, n[PAE （ NH2 ）8] ：n （ SAA ） ：n [PEO-A （454） 3 = 1：12：8, and CH3OH was used as solvent, the yield was 48. 83%. It was also found that PAE-SAA-PEO-A hadgood water solubility and surface activity. PAE-SAA-PEO-A had good solubilization onbenzoic acid and salicylic acid, and its solubilization on the latter was more significant, which was about 2.4 times that of PEG - 400 at the same concentration of 0. 500 g/L.