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采用乳液聚合方法制备了超支化聚(酰胺-酯)-苯乙烯-丙烯酸丁酯的两亲性共聚物。乳液聚合转化率的测定及用扫描电镜(SEM)对相应乳胶粒子的观察表明,超支化大分子参与下的乳液聚合过程也包括3个阶段,符合经典乳液聚合特点。超支化大分子的加入使乳液对电解质稳定性提高。另外,超支化大分子具有三维网状球形结构,作为硬段部分引入到直链型共聚物分子中,使链段的运动能力下降,导致共聚物的玻璃化转变温度(Tg)上升。溶解性实验发现,此两亲共聚物可以很好地溶解在弱极性有机溶剂中,利用其两亲性可以将水溶性小分子染料甲基橙从水相转移到三氯甲烷溶液中。
An amphiphilic copolymer of hyperbranched poly (amide-ester) -styrene-butyl acrylate was prepared by emulsion polymerization. The determination of emulsion polymerization conversion and the observation of the corresponding latex particles by scanning electron microscopy (SEM) showed that the emulsion polymerization process involving hyperbranched macromolecules also includes three stages, which are in line with the classical emulsion polymerization. The addition of hyperbranched macromolecules increases the stability of the electrolyte to the electrolyte. In addition, the hyperbranched macromolecules have a three-dimensional reticular spheroidal structure, which is introduced into the linear copolymer molecules as a hard segment to decrease the mobility of the segments, resulting in the increase of the glass transition temperature (Tg) of the copolymer. Solubility experiments showed that this amphiphilic copolymer can dissolve well in weak polar organic solvents, and its amphiphilicity can transfer methyl orange, a water-soluble small molecule dye, from aqueous phase to chloroform solution.