2008 年 33 巻 1 号 p. 149-152
We have studied the preparations and characterizations of nano-sized complexes derived from stimuli-responsive AB- or ABA-type block copolymers and G3 poly(amidoamine) dendrimers. The block copolymers consisted of thermo-responsive poly(N-isopropylacrylamide) and poly(methacrylic acid), respectively. The nano-sized complexes were consequent on the electrostatic interactions between carboxyl groups of the block copolymers and amino groups of dendrimers in aqueous solutions. We confirmed the effective nano-sized complex formation by dynamic light scattering measurement and transmission electron microscope. Interestingly, the nano-sized complex derived from ABA-type triblock copolymer had smaller size than that from AB-type diblock copolymer. The condensation reactions between the block copolymers and the dendrimers effectively improved the stability of the nano-sized complexes in aqueous solutions. Furthermore, we also confirmed the sensitive response in temperature change.
