CAJ | 학술논문

利用原子转移自由基聚合的方法合成了新型三嵌段共聚物聚（氧化乙烯）甲基醚-b-聚丙烯酸-b-聚[6-（4-甲氧基偶氮苯-4′-氧基）己基甲基丙烯酸]，通过透射电子显微镜、扫描电子显微镜、激光光散射和紫外-可见光光谱研究了该共聚物在水中的自组装行为及其 pH 值和光响应性。研究发现该共聚物可自组装形成囊泡。在 pH 值小于3．4时，胶束粒径随着 pH 值的减小而急剧增大；pH 值大于3．4时，粒径无明显变化。在偏振光的照射下，聚集体会随着照射时间的延长而拉长。
이용원자전이자유기취합적방법합성료신형삼감단공취물취（양화을희）갑기미-b-취병희산-b-취[6-（4-갑양기우담분-4′-양기）기기갑기병희산]，통과투사전자현미경、소묘전자현미경、격광광산사화자외-가견광광보연구료해공취물재수중적자조장행위급기 pH 치화광향응성。연구발현해공취물가자조장형성낭포。재 pH 치소우3．4시，효속립경수착 pH 치적감소이급극증대；pH 치대우3．4시，립경무명현변화。재편진광적조사하，취집체회수착조사시간적연장이랍장。
A new triblock copolymer poly(ethylene oxide)monomethyl ether-b-poly(acrylic aid)-b-poly[6-4-methoxy-azobenzene-4′-oxy)hexyl methylacrylate]was synthesized by the atom transfer radical polymerization (ATRP)method.The self-assembly behaviors in aqueous media,pH sensitive and photo-sensitive properties of this copolymer were studied by the means of transmis-sion electron microscopy (TEM),scanning electron microscopy (SEM),laser light scattering (LLS)and UV-Vis spectropho-tometer.It is found that the polymer can self-assemble into vesicle structure.With decreasing the pH value,the particle size of the aggregates increases sharply obviously bigger when pH<3.4.However,there is not significant change for the particle size of micelles when pH>3.4.Upon irradiation with polarized light,the aggregates are elongated with increasing the irradiation time.